Inspection after a Flight through Volcanic Ash, after Volcanic Sulfur Odor or after Volcanic Ash Contamination on the Ground

TASK 05-51-25-200-003-A
Inspection after a Flight through Volcanic Ash, after Volcanic Sulfur Odor or after Volcanic Ash Contamination on the Ground

1. Reason for the Job
This procedure gives information about the inspection of the aircraft:

After a flight in volcanic ash conditions, or
If there was a sulfur odor during a flight in volcanic ash conditions, or
After volcanic ash contamination when the aircraft was on the ground.

NOTE: Definition of volcanic ash:
Volcanic ash is small particles of rock powder that are blown out of a volcano. These particles can go into the atmosphere to the aircraft flight levels. They can move thousands of miles and stay in the atmosphere for long periods.
Many events show that engine and/or APU operation in volcanic ash environment can cause important damage to the engine and/or APU.

It is the responsibility of the operator to make the decision to do the inspection after volcanic ash conditions.

NOTE: The necessary inspections are related to the preservation level of the aircraft before the volcanic ash event.
The inspections are necessary for the components/systems for which there was no preservation or unsatisfactory preservation (volcanic ash found behind the protection covers/devices).
The inspection of the probes/sensors is always necessary.

NOTE: An adjustable access platform (2.5m to 17m (8.2ft to 55.9ft)) is necessary to get access to the different parts of the aircraft during this inspection.

2. Job Set-up Information
A. Fixtures, Tools, Test and Support Equipment

REFERENCE	QTY	DESIGNATION
No specific	1	ACCESS PLATFORM 2M (6 FT) - ADJUSTABLE
No specific	AR	BLOWING EQUIPMENT - DRY AIR
No specific	AR	BRUSH - BRISTLED, SOFT
No specific	AR	FILM - POLYETHYLENE
No specific	AR	TAPE - ADHESIVE
No specific	AR	VACUUM CLEANER
No specific	AR	WARNING NOTICE(S)

B. Consumable Materials

REFERENCE	DESIGNATION
(Material No.14SBA1)	Textile-Lint free Cotton -

C. Referenced Information

REFERENCE	DESIGNATION
TASK 10-11-00-553-801-A	Preservation of the Aircraft from a Sand/Dust Storm or Volcanic Ash Conditions on the Ground
TASK 10-11-00-555-013-A	Installation of the Aircraft Protection Equipment
TASK 10-11-00-555-014-A	Removal of the Aircraft Protection Equipment
TASK 12-15-38-613-001-A	Fill the Potable Water Tank System (Aircraft Electrical Power Available)
TASK 12-15-38-613-002-A	Fill the Potable Water Tank System (Aircraft Electrical Power not Available)
TASK 12-21-11-615-002-A	External Cleaning
TASK 12-24-34-600-001-A	Bleeding of the Standby Air Data System
TASK 12-24-38-680-001-A	Draining of the Potable Water System (with Electrical Power)
TASK 12-24-38-680-002-A	Draining of the Potable Water System (without Electrical Power)
TASK 12-32-28-281-803-A	Sample Fuel for Volcanic-Ash Contamination Analysis
TASK 12-32-29-281-001-A	Analyze Hydraulic Fluid
TASK 21-21-41-000-001-A	Removal of the Recirculation Filter Cartridge
TASK 21-21-41-400-001-A	Installation of the Recirculation Filter Cartridge
TASK 21-26-43-600-016-A	Discard Demister Filter Element and Filter Cartridge (LE BOZEC)
TASK 21-26-43-600-018-A	Servicing of the Demister Filter
TASK 21-26-43-600-019-A	Servicing of the Filter Cartridge
TASK 21-26-43-920-001-A	Discard Filter Cartridge (PALL)
TASK 21-51-51-000-001-A	Removal of the Pack Flow-Control Valve/ Pack Flow-Control Unit
TASK 21-51-51-400-001-A	Installation of the Pack Flow-Control Valve/Pack Flow-Control Unit
TASK 21-63-52-000-001-A	Removal of the Pressure Regulating Valve
TASK 21-63-52-400-001-A	Installation of the Pressure Regulating Valve
TASK 24-41-00-862-002-A	De-energize the Aircraft Electrical Circuits Supplied from the External Power
TASK 24-41-00-862-002-A-01	De-energize the Aircraft Electrical Circuits Supplied from the APU
TASK 24-41-00-862-002-A-02	De-energize the Aircraft Electrical Circuits Supplied from the Engine 1(2)
TASK 26-15-00-100-001-A	Cleaning of the Avionics-Compartment Smoke-Detector Piccolo-Tubes
TASK 26-15-15-000-001-A	Removal of the Smoke Detector - Avionics Compartment
TASK 26-15-15-400-001-A	Installation of the Smoke Detector - Avionics Compartment
TASK 26-16-15-000-001-A	Removal of the Cargo-Compartment Smoke Detectors
TASK 26-16-15-400-001-A	Installation of the Cargo-Compartment Smoke Detectors
TASK 26-21-00-720-003-A-01	Check Distribution Piping to Detect Leakage and Obstruction
TASK 26-21-00-720-003-B-01	Check Distribution Piping to Detect Leakage and Obstruction
TASK 26-21-00-720-003-C	Check Distribution Piping to Detect Leakage and Obstruction
TASK 26-21-00-720-003-C-01	Check Distribution Piping to Detect Leakage and Obstruction
TASK 26-21-00-720-003-C-02	Check Distribution Piping to Detect Leakage and Obstruction
TASK 26-21-00-720-802-A	Check Distribution Piping to Detect Leakage and Obstruction
TASK 27-50-00-866-008-A	Extension of the Flaps on the Ground
TASK 27-50-00-866-008-A-01	Extension of the Flaps/Slats on the Ground
TASK 27-50-00-866-009-A	Retraction of the Flaps on the Ground
TASK 27-50-00-866-009-A-01	Retraction of the Flaps/Slats on the Ground
TASK 27-60-00-866-002-A	Extension-Retraction of the Spoilers for Maintenance
TASK 27-80-00-866-004-A	Extending the Slats on the Ground
TASK 27-80-00-866-005-A	Retracting the Slats on the Ground
TASK 27-84-63-000-001-A	Removal of the No. 1 Slat
TASK 27-84-63-400-002-A	Installation of the No. 1 Slat
TASK 27-84-64-000-001-A	Removal of the No. 2 Slat
TASK 27-84-64-400-002-A	Installation of the No. 2 Slat
TASK 27-84-65-000-001-A	Removal of the No 3 Slat
TASK 27-84-65-400-002-A	Installation of the No 3 Slat
TASK 27-84-66-000-001-A	Removal of the No. 4 Slat
TASK 27-84-66-400-002-A	Installation of the No. 4 Slat
TASK 27-84-67-000-001-A	Removal of the No. 5 Slat
TASK 27-84-67-400-002-A	Installation of the No. 5 Slat
TASK 28-12-47-200-001-A	Visual Check of NACA Intake for Signs of Blockage
TASK 28-13-00-200-001-A	Inspection of the Drain Mast Outlet for Obstruction
TASK 29-00-00-864-001-A	Put the Related Hydraulic System in the Depressurized Configuration before Maintenance Action
TASK 29-10-00-200-006-A	Check Clogging Indicator on Engine-Driven Pump (EDP) Case Drain Filter
TASK 29-10-00-200-007-A	Check Clogging Indicator on Engine Driven Pump (EDP) Case Drain Filter (Pop Out not Protruding)
TASK 29-10-00-210-002-A	Check Clogging Indicators on Return, Case Drain, Ground Servicing, HP Delivery, HP Bleed Air and LP Bleed Air, Water Separator Filters and Reservoir Pressurization Filter
TASK 29-11-43-200-802-A	Visual Check of the Engine-Pump Case-Drain Filter Contamination (Pop-Out) Indicator
TASK 29-13-43-200-802-A	Visual Check of the Engine-Pump Case-Drain Filter Contamination (Pop-Out) Indicator
TASK 29-14-42-000-002-A	Removal of the Filter Element of the Water Separator
TASK 29-14-42-400-002-A	Installation of the Filter Element of the Water Separator
TASK 29-22-00-869-005-A	Extension of the Ram Air Turbine (RAT) on the Ground
TASK 29-22-00-869-006-A	Retraction of the Ram Air Turbine (RAT) on the Ground
TASK 30-11-41-000-001-A	Removal of the Telescopic Duct
TASK 30-11-41-400-001-A	Installation of the Telescopic Duct
TASK 30-11-51-000-001-A	Removal of the Wing Anti-Ice Control-Valve
TASK 30-11-51-000-002-A	Removal of the Anti-Ice Valve Filter
TASK 30-11-51-400-001-A	Installation of the Wing Anti-Ice Control-Valve
TASK 30-11-51-400-002-A	Installation of the Anti-Ice Valve Filter
TASK 30-21-51-000-010-B	Removal of the Engine Air Intake Anti-ice Valve
TASK 30-21-51-000-040-A	Removal of the Engine Air-Intake Anti-Ice Valve
TASK 30-21-51-000-041-A	Removal of the Engine Air-Intake Anti-ice Valve
TASK 30-21-51-000-802-A	Removal of the Upper Anti-Ice Valve
TASK 30-21-51-000-803-A	Removal of the Lower Anti-Ice Valve
TASK 30-21-51-400-010-B	Installation of the Engine Air Intake Anti-ice Valve
TASK 30-21-51-400-041-A	Installation of the Engine Air-Intake Anti-Ice Valve
TASK 30-21-51-400-042-A	Installation of the Engine Air-Intake Anti-ice Valve
TASK 30-21-51-400-802-A	Installation of the Upper Anti-Ice Valve
TASK 30-21-51-400-803-A	Installation of the Lower Anti-Ice Valve
TASK 32-00-00-481-001-A	Installation of the Safety Devices on the Landing Gears
TASK 32-12-00-010-001-A	Open the Main Gear Doors for Access
TASK 32-12-00-410-001-A	Close the Main Gear Doors after Access
TASK 32-22-00-010-001-A	Nose Gear Doors - Ground Doors Opening
TASK 32-22-00-410-001-A	Nose Gear Doors - Ground Doors Closing
TASK 34-10-00-170-001-A	Flushing of the Total Pressure Lines
TASK 34-10-00-170-002-A	Flushing of the Principal Static Pressure Lines
TASK 34-10-00-170-003-A	Draining and Flushing of Standby Pneumatic Circuits
TASK 34-11-15-200-001-A	Inspection/Check of the Pitot Probe
TASK 34-11-16-200-001-A	Inspection of the Static Port and Standby Static Port
TASK 34-11-18-200-002-A	Inspection/Check of the TAT Sensor
TASK 34-11-19-200-001-A	Inspection of the Angle Of Attack (AOA) Sensor
TASK 34-22-25-170-001-A	Draining and Flushing of Standby Pneumatic Circuits
TASK 35-12-41-100-001-A	Cleaning of Oxygen Masks
TASK 36-11-51-000-010-A	Removal of the HP Bleed Valve
TASK 36-11-51-000-040-A	Removal of the High Pressure Bleed Valve
TASK 36-11-51-000-042-A	Removal of the High Pressure Bleed Valve
TASK 36-11-51-000-802-A	Removal of the HP Bleed Valve (HPV)
TASK 36-11-51-400-010-A	Installation of the HP Bleed Valve
TASK 36-11-51-400-040-A	Installation of the High-Pressure Bleed Valve
TASK 36-11-51-400-042-A	Installation of the High-Pressure Bleed Valve
TASK 36-11-51-400-802-A	Installation of the HP Bleed Valve (HPV)
TASK 36-11-52-000-010-B	Removal of the Bleed Pressure-Regulator Valve
TASK 36-11-52-000-040-A	Removal of the Bleed Pressure-Regulator Valve
TASK 36-11-52-000-042-A	Removal of the Bleed Pressure Regulator Valve
TASK 36-11-52-000-802-A	Removal of the Bleed Pressure-Regulator Valve
TASK 36-11-52-400-010-B	Installation of the Bleed Pressure-Regulator Valve
TASK 36-11-52-400-040-A	Installation of the Bleed Pressure-Regulator Valve
TASK 36-11-52-400-042-A	Installation of the Bleed Pressure Regulating Valve (PRV)
TASK 36-11-52-400-802-A	Installation of the Bleed Pressure-Regulator Valve
TASK 36-12-52-000-001-A	Removal of the Crossbleed Valve
TASK 36-12-52-400-001-A	Installation of the Crossbleed Valve
TASK 38-41-00-610-001-A	Discard System Filter Element
TASK 47-10-41-920-001-A	D-ULPA Filter Element Replacement
TASK 47-10-43-920-001-A	Air Separator Module Replacement
TASK 47-20-43-000-001-A	Removal of the Dual-Flapper Check Valve
TASK 47-20-43-400-001-A	Installation of the Dual-Flapper Check Valve
TASK 47-21-41-000-001-A	Removal of the Isolation Valve Assembly
TASK 47-21-41-400-001-A	Installation of the Isolation Valve Assembly
TASK 47-21-43-000-001-A	Removal of the Dual-Flow and Shut-off Valve
TASK 47-21-43-400-001-A	Installation of the Dual-Flow and Shut-off Valve
TASK 47-31-34-740-001-A	BITE Test of the IGGS with Bleed Air
TASK 49-00-00-200-807-A	Procedure After Volcanic Ash Environment Operation (APS3200)
TASK 49-00-00-200-809-A	Procedure After Volcanic Ash Environment Operation (131-9(A))
TASK 53-15-11-200-001-A	Detailed Inspection of the Radome
TASK 53-15-11-200-001-A-01	Detailed Inspection of the Radome
TASK 56-11-11-200-001-A	Inspection of the Windshields
TASK 56-11-12-200-001-A	Inspection of the Fixed Windows
TASK 56-12-11-200-001-A	Inspection of the Sliding Windows
TASK 56-21-13-200-001-A	Detailed Inspection of Cabin Window Panes, including Window Panes in Doors
TASK 56-31-00-210-001-A	Detailed Inspection of the Passenger/Crew Door Windows
TASK 71-00-00-200-807-A	Inspection and Cleaning of the Nacelle (After Exposure to Volcanic Ash/Sand)
TASK 71-11-00-210-001-A	Visual Inspection of the Air Intake Cowl
TASK 71-11-00-210-040-A	Visual Inspection of the Air Intake Cowl
TASK 71-11-11-200-011-A	Visually Examine the Air Intake Cowl - Allowable Damage Data
TASK 71-13-00-200-010-A	Detailed Inspection of the Fan Cowl Doors
TASK 71-13-11-200-804-A	Visual Inspection of the Fan Cowl Doors
TASK 71-13-11-200-804-C	Visual Inspection of Fan Cowl Doors
TASK 72-00-00-200-020-A	Inspection after Flight Through Volcanic Ash
TASK 72-00-00-200-041-A	Procedure After Volcanic Ash, Dust, or Sand Ingestion
TASK 72-00-00-200-043-A	Procedure after Volcanic Ash, Dust, or Sand Ingestion
TASK 72-00-00-210-815-A	Visual Examination of the Engine (after Exposure to Volcanic Ash/Sand)
TASK 78-32-00-200-015-A	Visually Examine the Thrust Reverser - Allowable Damage Data
TASK 78-32-11-210-001-A	Detailed Visual Inspection of the Thrust Reverser
TASK 78-32-11-210-040-A	Detailed Visual Inspection of the Thrust Reverser
TASK 12-22-27-03	FLIGHT CONTROLS - SERVICING
TASK 12-22-32-03	LANDING GEAR - SERVICING
TASK 26-17-15-04	DETECTOR - SMOKE - REMOVAL/INSTALLATION
Protection Cover/Device on the AOA Sensor - Diamond Shape
Protection Cover/Device on the Probe/Sensor - Square Shape

3. Job Set-up
Subtask 05-51-25-210-074-A

A. General

WARNING: DO NOT BREATHE VOLCANIC ASH. DO NOT GET VOLCANIC ASH IN YOUR EYES. PUT ON PROTECTIVE CLOTHES, EYE GOGGLES AND A RESPIRATOR MASK. MAKE SURE THAT THE RESPIRATOR MASK CAN REMOVE VOLCANIC ASH FROM THE AIR. VOLCANIC ASH CAN CAUSE EYE IRRITATION AND INJURY TO THE RESPIRATORY SYSTEM.

(1) Volcanic ash
(a) Volcanic ash is hard, very abrasive and acid (pH between 2 and neutral).
It can cause erosion/abrasion, etching or shot-peening on the surfaces and can remove the finish/protection layers and thus cause damage/corrosion.
(b) The ash particles can be of different sizes but the texture of volcanic ash is almost the same as talcum powder. It can go into all holes/openings and go through many seals. Volcanic ash will stay:

On bare and lubricated surfaces
In all corners
In bottom places.

It can cause unusual wear and contamination of many aircraft systems and filter elements.
(c) The volcanic ash will melt when it goes through the combustion chamber of the engines.
The melted ash has very high adhesive qualities and bonds to engine parts and thus decreases engine performance. It can cause blockage of the fuel injectors and can cause an engine shutdown.
(2) Inspection requirements
(a) Volcanic ash can cause severe damage/contamination on the structure/systems of the aircraft.
It is not possible to estimate the quantity and the type of damage after volcanic ash contamination. Thus, it is necessary to do a full inspection of the aircraft to know the damage and make a decision about the necessary repair/action.
(b) All the necessary inspections are visual unless the text gives other instructions.
Operators can refer to the Non-destructive Testing Manual (NTM) and use non-destructive procedures.
(c) If you find damage to the aircraft structure, refer to the Structural Repair Manual (SRM). The SRM has the approved damage limits and repair procedures.
(d) If you find damage to paint/protection, refer to the Structural Repair Manual (SRM). The SRM has the approved paint/protection repair procedures.
(e) Examine the aircraft surfaces, structures, systems for contamination, erosion/abrasion, dents, etching, delamination or other damage.

Subtask 05-51-25-210-075-A

B. Inspection Preparation
(1) If contamination occurred in flight or during landing or take off:
(a) Before you start, we recommend that you get information from the crew about the flight conditions.
(b) Make sure that you have the related aircraft Post Flight Report (PFR).
(c) Do a check of all the events reported by the crew or by the PFR in addition/conjunction with this inspection.
(2) If contamination occurred when the aircraft was on the ground with preservation from volcanic ash (Ref. AMM TASK 10-11-00-553-801):

Do not do a check of the systems which have the applicable protective covers/devices if you do not find volcanic ash behind them.

(3) If there was a sulfur odor during a flight in volcanic ash conditions without the volcanic ash seen on the external surface of the aircraft:
(a) Examine the recirculation filters for contamination.
1 If you find contamination in the recirculation filters:
a Replace the recirculation filters (Ref. AMM TASK 21-21-41-000-001) and (Ref. AMM TASK 21-21-41-400-001).
b Do all the procedures given in paragraph 4 of this task.
2 If there is no contamination in the recirculation filters:
a Replace the recirculation filters (Ref. AMM TASK 21-21-41-000-001) and (Ref. AMM TASK 21-21-41-400-001).

Subtask 05-51-25-481-052-A

C. Safety Precautions
(1) Install the safety devices on the landing gears (Ref. AMM TASK 32-00-00-481-001).

Subtask 05-51-25-866-054-A

D. Extension of the Flight Control Surfaces
(1) Extend the flaps (Ref. AMM TASK 27-50-00-866-008).
(2) Extend the slats (Ref. AMM TASK 27-80-00-866-004).
(3) Extend the spoilers (Ref. AMM TASK 27-60-00-866-002).

Subtask 05-51-25-010-052-A

E. Get Access
(1) Open the main gear doors and install the safety devices (Ref. AMM TASK 32-12-00-010-001).
(2) Open the nose gear doors and install the safety devices (Ref. AMM TASK 32-22-00-010-001).

Subtask 05-51-25-860-053-A

F. Aircraft Maintenance Configuration
(1) Make sure that the hydraulic systems are depressurized
(Ref. AMM TASK 29-00-00-864-001)
(2) De-energize the aircraft electrical circuits
(Ref. AMM TASK 24-41-00-862-002).
(3) Put WARNING NOTICE(S) in the cockpit to tell persons not to operate the systems.
(4) Put the ACCESS PLATFORM 2M (6 FT) - ADJUSTABLE in position near the inspection area.

4. Procedure
Subtask 05-51-25-160-052-A

CAUTION: DO NOT RUB THE SURFACE WHEN YOU REMOVE THE ASH FROM THE AIRCRAFT. IF YOU RUB THE SURFACE, YOU CAN CAUSE EROSION/ABRASION.

A. Removal of Volcanic Ash Contamination from the External Surfaces

NOTE: If the aircraft was on the ground with preservation from volcanic ash:

Aircraft cleaning is not necessary if you cleaned it before the removal of the protective covers (Ref. AMM TASK 10-11-00-555-014).

(1) Dry volcanic ash:

CAUTION: IF THERE IS DRY ASH, DO NOT USE FLUIDS TO REMOVE THE ASH. IF THERE IS A LAYER OF ASH ON THE AIRCRAFT SURFACES, REMOVE THE ASH WITH A VACUUM CLEANER (OR, IF YOU CANNOT USE A VACUUM CLEANER, USE AN AIR BLOWER, A SOFT CLOTH OR A HAND BRUSH). FLUIDS CAN MIX WITH THE ASH AND MAKE A PASTE THAT CAN CAUSE EROSION/ABRASION. THIS PASTE CAN GO INTO AREAS THAT ARE NOT EASY TO CLEAN.

CAUTION: WHEN YOU BLOW DRY ASH WITH AN AIR BLOWER, MAKE SURE THAT THE ASH DOES NOT CAUSE CONTAMINATION OF THE OTHER COMPONENTS (PROBES, ETC.).

(a) If there is a layer of volcanic ash on the aircraft surfaces, remove the volcanic ash with the VACUUM CLEANER, the BLOWING EQUIPMENT - DRY AIR, Textile-Lint free Cotton - (Material No.14SBA1) or the BRUSH - BRISTLED, SOFT.
(2) Wet volcanic ash:

CAUTION: USE A LOW-PRESSURE WATER SUPPLY EQUIPMENT WITH A MAXIMUM FLOW TO REMOVE WET CONTAMINATION. DO NOT USE A HIGH-PRESSURE SPRAYING EQUIPMENT. DO NOT POINT THE WATER JET IN THE DIRECTION OF THE PROBES AND SENSORS. YOU MUST CLEAN THESE AREAS BY HAND. IF YOU DO NOT OBEY THESE INSTRUCTIONS, DAMAGE TO THE PROBES, WINDSHIELD, DOORS AND OTHER EQUIPMENT CAN OCCUR.

(a) If there is a layer of wet volcanic ash on the aircraft surfaces:
1 On the static probes, pitot probes, ice detectors (if installed), Angle of Attack (AOA) sensors and Total Air Temperature (TAT) sensors, remove the TAPE - ADHESIVE from the bottom side of the FILM - POLYETHYLENE (if installed before the volcanic ash condition) to let the water drain.
2 If no FILM - POLYETHYLENE was installed on the probes/sensors before the volcanic ash condition:
a Remove the contamination from the protection covers/devices (if installed before the volcanic ash condition) and their adjacent structure with Textile-Lint free Cotton - (Material No.14SBA1) .
b If no protection covers/devices were installed on the probes/sensors before the volcanic ash condition:

Remove the contamination from the probes/sensors and their adjacent structure with Textile-Lint free Cotton - (Material No.14SBA1) .
Install the protection covers/devices (Ref. AMM TASK 10-11-00-555-013).

c After the installation of the protection covers/devices on the AOA sensors:

Apply the FILM - POLYETHYLENE (diamond shape (length 600 mm (23.62 in.) and width 600 mm (23.62 in.))) on the protection covers/devices on the AOA sensors.
Protection Cover/Device on the AOA Sensor - Diamond Shape
Seal the FILM - POLYETHYLENE at the top and on the sides with the TAPE - ADHESIVE. Do not seal the bottom corner of the FILM - POLYETHYLENE on a length of 50 mm (1.97 in.) to let the water drain.
Make sure that the FILM - POLYETHYLENE is not too tight on the protection covers/devices on the AOA sensors.
Record the locations where you apply the FILM - POLYETHYLENE and the TAPE - ADHESIVE.

d After the installation of the protection covers/devices on the other probes/sensors (static probes, ice detectors (if installed), pitot probes, and TAT sensors):

Apply the FILM - POLYETHYLENE (square shape (length 600 mm (23.62 in.) and width 600 mm (23.62 in.))) on the protection covers/devices on the probes/sensors.
Protection Cover/Device on the Probe/Sensor - Square Shape

NOTE: You can apply the FILM - POLYETHYLENE in rectangular shape for the probes/sensors that are near from each other.

Seal the FILM - POLYETHYLENE at the top and on the sides with the TAPE - ADHESIVE. Do not seal the bottom side of the FILM - POLYETHYLENE to let the water drain.
Make sure that the FILM - POLYETHYLENE is not too tight on the protection covers/devices on the probes/sensors.
Record the locations where you apply the FILM - POLYETHYLENE and the TAPE - ADHESIVE.

3 Remove the volcanic ash from the aircraft surface with a low-pressure water-supply equipment:
a Clean the top of the aircraft first and then the bottom.

NOTE: Cleaning from the top to the bottom is recommended to make sure that the contamination is fully removed from the aircraft.

b Carefully clean the recesses and empty spaces (cavities) on the aircraft (e.g. slats, flaps, brakes, landing gears and landing gear bays) where particles can stay.
c After cleaning, do an inspection of the recesses, empty spaces and outlets on the top of the aircraft (e.g. precooler exhausts). Make sure that there is no contamination on the inner surfaces of these parts.
4 Refer to the recorded positions and remove all the TAPE - ADHESIVE and the FILM - POLYETHYLENE installed during the preservation procedure.

Subtask 05-51-25-210-076-A

B. Internal Inspection
This inspection is not necessary if:

You do not find contamination behind the doors immediately after you open them, and
All the doors (passenger and cargo) and windows were closed and the aircraft was in ditching mode during the dust/sand storm.

ITEM	INSPECTION TASKS	PHASE 1	PHASE 2	PHASE 3
1.	Inspection of the cabin area
A.	Examine the cabin area for ash contamination. If you find contamination:	X
	(1) Clean all the surfaces with contamination.		X
B.	In the lavatories, examine all the smoke detectors for ash contamination. If you find contamination:	X
	Replace the smoke detectors, refer to the applicable procedure in (Ref. AMM D/O 26-17-15-04) - DETECTOR-SMOKE-REMOVAL/INSTALLATION.		X
C.	In all the auxiliary areas that follow (if installed), examine all the smoke detectors for ash contamination: The Global System for the Mobile Communication (GSM) Rack The Video Control Center (VCC). If you find contamination:	X
	(1) Replace the smoke detector(s) in: The GSM Rack (Ref. AMM TASK 26-18-15-000-001) The VCC Rack (Ref. AMM TASK 26-18-15-000-802).		X
D.	Examine the cockpit for ash contamination. If you find contamination:	X
	(1) Clean all the surfaces with contamination.		X
	(2) Examine the full-face oxygen masks for contamination. If you find contamination :		X
	(a) Clean the full-face oxygen masks (Ref. AMM TASK 35-12-41-100-001).			X
E.	(1) Examine the avionics compartment (all the items that you can see) for volcanic ash contamination, specially: - Around the ventilated components - The plugs - The equipment. If you find contamination:	X
	(a) Clean all the surfaces with contamination. NOTE : If there is a crew report of a very dense cloud of volcanic ash, includes the computers in the workshop.		X
	(b) Replace the filter cartridge [2082HM] (Ref. AMM TASK 21-26-43-600-002) (Ref. AMM TASK 21-26-43-600-803) (Ref. AMM TASK 21-26-43-600-016) (Ref. AMM TASK 21-26-43-920-001).		X
	(c) Replace the demister filter [2081HM] (if installed) (Ref. AMM TASK 21-26-43-600-001) (Ref. AMM TASK 21-26-43-600-802) (Ref. AMM TASK 21-26-43-600-018).		X
	(2) Clean the smoke detector piccolo-tubes in the avionics compartment (Ref. AMM TASK 26-15-00-100-001). If you find contamination:	X
	(a) Replace the smoke detectors (Ref. AMM TASK 26-15-15-000-001) (Ref. AMM TASK 26-15-15-400-001).		X
F.	Examine the cargo compartments for ash contamination. If you find contamination:	X
	(1) Clean all the surfaces with contamination (specially the sensors of the Power Drive Unit (PDU)).		X
	(2) Examine the cargo drainage system (if installed) for ash contamination. If you find contamination:		X
	(a) Replace the filters of the drain funnels.			X
	(3) Examine all the smoke detectors. If you find contamination:	X
	(a) Replace the smoke detectors (Ref. AMM TASK 26-16-15-000-001) (Ref. AMM TASK 26-16-15-400-001).		X

Subtask 05-51-25-210-077-A

C. Inspection of the Fuselage, the Wings and the Stabilizers

ITEM	INSPECTION TASKS	PHASE 1	PHASE 2
1.	Inspection of the fuselage
A.	Examine the radome skin for damage (Ref. AMM TASK 53-15-11-200-001).	X
B.	Examine the windshield, the fixed windows and the sliding windows for damage: - For the windshield (Ref. AMM TASK 56-11-11-200-001) - For the fixed windows (Ref. AMM TASK 56-11-12-200-001) - For the sliding windows (Ref. AMM TASK 56-12-11-200-001)	X
C.	Examine the passenger cabin windows, the passenger/crew doors and the emergency exit windows for damage (Ref. AMM TASK 56-21-13-200-001) (Ref. AMM TASK 56-31-00-210-001).	X
D.	Examine all of the fuselage skin, the belly fairing and the wing-to-fuselage fairings for damage.	X
E.	Examine the ram air inlet and outlet, the air inlet and outlet flaps for damage.	X
2.	Inspection of the Wings
A.	Examine all the static dischargers for damage.	X
B.	Examine the top and bottom skin of the wings for damage.	X
C.	Examine the flap track fairings for damage.	X
D.	Examine the skin of all the control surfaces (slats, flaps, ailerons and spoilers), specially the leading and the trailing edges, for damage.	X
E.	Examine the hinge areas of the spoilers and the ailerons for contamination.	X
F.	Examine the flap tracks, flap inter connecting strut, track 4 sensor, roller mechanisms, steady bearings and universal joints for contamination. Make sure that there is no ash deposit on the roller stops. If you find contamination:	X
	(1) Clean and lubricate the related components (Ref. AMM D/O 12-22-27-03).		X
G.	Examine the piston rods of each servocontrol of the ailerons and the spoilers for contamination. If you find contamination:	X
	(1) Clean the piston rods of the servocontrols.		X
3.	Inspection of the Vertical Stabilizer
A.	Examine all the static dischargers for damage.	X
B.	Examine the skin of the vertical stabilizer and the rudder, specially the leading and the trailing edges, for damage.	X
C.	Examine the hinge areas of the rudder for contamination.	X
D.	Examine the piston rods of each servocontrol of the rudder for contamination. If you find contamination:	X
	(1) Clean the piston rods of the servocontrols.		X
4.	Inspection of the Horizontal Stabilizers
A.	Examine all the static dischargers for damage.	X
B.	Examine the skin of the horizontal stabilizers and the elevators, specially the leading and the trailing edges, for damage.	X
C.	Examine the hinge areas of the elevators for contamination.	X
D.	Examine the piston rods of each servocontrol of the elevators for contamination. If you find contamination:	X
	(1) Clean the piston rods of the servocontrols.		X
5.	Inspection of the external lights
A.	Examine all the external lights for damage. If you find damage:	X
	(1) Replace the related component(s).		X
6.	Inspection of the antennas and the drain masts
A.	Examine all the antennas and the drain masts for damage. If you find damage:	X
	(1) Replace the related component(s).		X

Subtask 05-51-25-210-078-A ** ON A/C NOT FOR ALL

D. Inspection of the Probes and Sensors
(1) You must flush all the pressure lines if:

There is a flight crew report of a very dense cloud of volcanic ashes, or
There is a maintenance crew report of a very dense cloud of volcanic ashes with the probe covers/devices not in position, or
A general inspection shows signs of heavy contamination.

ITEM	INSPECTION TASKS	PHASE 1
1.	Inspection of the probes and sensors (if you did the preservation of the aircraft and you found no contamination behind the protection covers/devices of the probes and sensors during the de-preservation of the aircraft)
A.	Do an inspection of the probes and sensors:
	(1) Examine all the probes and sensors for damage and contamination (not clogged): - The pitot probes (Ref. AMM TASK 34-11-15-200-001) - The static probes (Ref. AMM TASK 34-11-16-200-001) - The TAT sensors (Ref. AMM TASK 34-11-18-200-002) - The AOA sensors (Ref. AMM TASK 34-11-19-200-001) - The ice detectors (if installed) and lighted icing indicators. (2) Make sure that the AOA sensors move freely and that the drain holes of the pitot probes are not clogged.	X
2.	Inspection of the probes and sensors (if you found contamination behind the protection covers/devices of the probes and sensors during the de-preservation of the aircraft)
A.	Do an inspection of the probes and sensors:
	(1) Examine all the probes and sensors for damage and contamination (not clogged): - The pitot probes (Ref. AMM TASK 34-11-15-200-001) - The static probes (Ref. AMM TASK 34-11-16-200-001) - The TAT sensors (Ref. AMM TASK 34-11-18-200-002) - The AOA sensors (Ref. AMM TASK 34-11-19-200-001) - The ice detectors (if installed) and lighted icing indicators. (2) Make sure that the AOA sensors move freely and that the drain holes of the pitot probes are not clogged.	X
B.	Clean all the probes and sensors:
	(1) Drain the standby static pressure lines (Ref. AMM TASK 12-24-34-600-001).	X
	(2) Flush the principal total-pressure lines (Ref. AMM TASK 34-10-00-170-001).	X
	(3) Flush the principal static-pressure lines (Ref. AMM TASK 34-10-00-170-002).	X
	(4) Drain and flush the standby static and standby total-pressure lines (Ref. AMM TASK 34-10-00-170-003)	X

Subtask 05-51-25-210-078-B ** ON A/C NOT FOR ALL

D. Inspection of the Probes and Sensors

NOTE: You must flush all the pressure lines if:

There is a flight crew report of a very dense cloud of volcanic ashes, or
There is a maintenance crew report of a very dense cloud of volcanic ashes with the probe covers/devices not in position, or
A general inspection shows signs of heavy contamination.

ITEM	INSPECTION TASKS	PHASE 1
1.	Inspection of the probes and sensors (if you did the preservation of the aircraft and you found no contamination behind the protection covers/devices of the probes and sensors during the de-preservation of the aircraft)
A.	Do an inspection of the probes and sensors:
	(1) Examine all the probes and sensors for damage and contamination (not clogged): - The pitot probes (Ref. AMM TASK 34-11-15-200-001) - The static probes (Ref. AMM TASK 34-11-16-200-001) - The TAT sensors (Ref. AMM TASK 34-11-18-200-002) - The AOA sensors (Ref. AMM TASK 34-11-19-200-001) - The ice detectors (if installed) and lighted icing indicators. (2) Make sure that the AOA sensors move freely and that the drain holes of the pitot probes are not clogged.	X
2.	Inspection of the probes and sensors (if you found contamination behind the protection covers/devices of the probes and sensors during the de-preservation of the aircraft)
A.	Do an inspection of the probes and sensors:
	(1) Examine all the probes and sensors for damage and contamination (not clogged): - The pitot probes (Ref. AMM TASK 34-11-15-200-001) - The static probes (Ref. AMM TASK 34-11-16-200-001) - The TAT sensors (Ref. AMM TASK 34-11-18-200-002) - The AOA sensors (Ref. AMM TASK 34-11-19-200-001) - The ice detectors (if installed) and lighted icing indicators. (2) Make sure that the AOA sensors move freely and that the drain holes of the pitot probes are not clogged.	X
B.	Clean all the probes and sensors:
	(1) Drain the standby static pressure-lines (Ref. AMM TASK 12-24-34-600-001).	X
	(2) Flush the principal total-pressure lines (Ref. AMM TASK 34-10-00-170-001).	X
	(3) Flush the principal static-pressure lines (Ref. AMM TASK 34-10-00-170-002).	X
	(4) Drain and flush the standby static and standby total-pressure lines (Ref. AMM TASK 34-22-25-170-001).	X

Subtask 05-51-25-210-079-A

E. Inspection of the Landing Gear Doors, the Landing Gears and the Landing Gear Wells

NOTE: If the aircraft was in flight with the landing gears retracted and the landing gears doors closed when volcanic ash contamination occurred, this inspection is not necessary.

ITEM	INSPECTION TASKS	PHASE 1
1.	Inspection of the landing gear doors, the landing gears and the landing gear wells. If you find contamination, you must: (a) Remove the contamination from surface, the moving joints and the chromed areas of shock absorbers and actuators before the next flight. (b) Do a full lubrication of the landing gears before a maximum of 10 flight cycles. (Ref. AMM D/O 12-22-32-03)
A.	Inspection of the doors (1) Examine all the doors for damage and/or contamination, specially on: - The door skin - The sealing - The door hinges - The proximity sensors - The actuator bare rods - The door recesses.	X
B.	Inspection of the landing gears (1) Examine all the landing gear structures and the components installed on them for damage and/or contamination, specially on: - The attachment points of the landing gears - The proximity sensors - The actuator rods - The chromed areas of the shock absorbers - The mechanical linkages and the moving joints.	X
C.	Inspection of the landing gear wells (1) Examine all the landing gear wells and the components installed in them for damage and/or contamination.	X

Subtask 05-51-25-210-080-A ** ON A/C NOT FOR ALL

F. Inspection of the Nacelles and the Engines

NOTE: If the aircraft was on the ground with the applicable protective covers/devices installed when the volcanic ash contamination occurred, this inspection is not necessary if there is no ash behind the covers.

NOTE: If the aircraft was on the ground without the applicable protective covers/devices installed:

We recommend that, after you start the engines, you let the engines operate for some minutes before you start the bleed air systems. This is to make sure that the engines blow out remaining particles.

ITEM	INSPECTION TASKS	PHASE 1	PHASE 2
1.	Inspection of the nacelles and engines
A.	Inspection of the nacelles
	(1) Examine the air intake cowl for damage. (Ref. AMM TASK 71-11-00-210-040)	X
	(2) Examine the fan cowl doors for damage. (Ref. AMM TASK 71-13-11-200-804)	X
	(3) Examine the thrust reversers for damage. (Ref. AMM TASK 78-32-11-210-040)	X
B.	Inspection of the engines
	(1) Examine the fire extinguisher outlets for contamination. If you find contamination:	X
	(a) Do a check of the distribution piping for blockage (Ref. AMM TASK 26-21-00-720-003).		X
	(2) Do the inspection/check of the engines after volcanic ash ingestion (Ref. AMM TASK 72-00-00-200-041)	X

Subtask 05-51-25-210-080-B ** ON A/C NOT FOR ALL

F. Inspection of the Nacelles and the Engines

NOTE: If the aircraft was on the ground without the applicable protective covers/devices installed:

We recommend that, after you start the engines, you let the engines operate for some minutes before you start the bleed air systems. This is to make sure that the engines blow out remaining particles.

ITEM	INSPECTION TASKS	PHASE 1	PHASE 2
1.	Inspection of the nacelles and engines
A.	Inspection of the nacelles
	(1) Examine the air intake cowl for damage. (Ref. AMM TASK 71-11-11-200-011)	X
	(2) Examine the fan cowl doors for damage. (Ref. AMM TASK 71-13-00-200-010)	X
	(3) Examine the thrust reversers for damage. (Ref. AMM TASK 78-32-00-200-015)	X
B.	Inspection of the engines
	(1) Examine the fire extinguisher outlets for contamination. If you find contamination:	X
	(a) Do a check of the distribution piping for blockage (Ref. AMM TASK 26-21-00-720-003).		X
	(2) Do the inspection/check of the engines after flight through volcanic ash (Ref. AMM TASK 72-00-00-200-020)	X

Subtask 05-51-25-210-080-C ** ON A/C NOT FOR ALL

F. Inspection of the Nacelles and the Engines

NOTE: If the aircraft was on the ground without the applicable protective covers/devices installed:

We recommend that, after you start the engines, you let the engines operate for some minutes before you start the bleed air systems. This is to make sure that the engines blow out remaining particles.

ITEM	INSPECTION TASKS	PHASE 1	PHASE 2
1.	Inspection of the nacelles and engines
A.	Inspection of the nacelles
	(1) Examine the air intake cowl for damage. (Ref. AMM TASK 71-11-00-210-001)	X
	(2) Examine the fan cowl doors for damage. (Ref. AMM TASK 71-13-11-200-804)	X
	(3) Examine the thrust reversers for damage. (Ref. AMM TASK 78-32-11-210-001)	X
B.	Inspection of the engines
	(1) Examine the fire extinguisher outlets for contamination. If you find contamination:	X
	(a) Do a check of the distribution piping for blockage (Ref. AMM TASK 26-21-00-720-003).		X
	(2) Do the inspection/check of the engines after volcanic ash ingestion (Ref. AMM TASK 72-00-00-200-043)	X

Subtask 05-51-25-210-080-E ** ON A/C NOT FOR ALL

F. Inspection of the Nacelles and the Engines

NOTE: If the aircraft was on the ground without the applicable protective covers/devices installed:

We recommend that, after you start the engines, you let the engines operate for some minutes before you start the bleed air systems. This is to make sure that the engines blow out remaining particles.

ITEM	INSPECTION TASKS	PHASE 1	PHASE 2
1.	Inspection of the nacelles and engines
A.	Do an inspection of the nacelles (Ref. AMM TASK 71-00-00-200-807).	X
B.	Inspection of the engines
	(1) Examine the fire extinguisher outlets for contamination. If you find contamination:	X
	(a) Do a check of the distribution piping for blockage (Ref. AMM TASK 26-21-00-720-802).		X
	(2) Do the inspection/check of the engines after volcanic ash ingestion (Ref. AMM TASK 72-00-00-210-815).	X

Subtask 05-51-25-210-100-A

G. Inspection of the APU

ITEM	INSPECTION TASKS	PHASE 1
A.	Do the Procedure after Volcanic Ash Environment Operation:	X
	(1) For APU GTCP 36-300: - (Ref. AMM D/O 49-00-00-20)
	(2) For APU 131-9 (A): - (Ref. AMM TASK 49-00-00-200-809)
	(3) For APU APS 3200: - (Ref. AMM TASK 49-00-00-200-807).

Subtask 05-51-25-210-082-A

H. Inspection of the Fuel System

ITEM	INSPECTION TASKS	PHASE 1	PHASE 2
1.	Inspection of the fuel system
A.	Inspect the NACA vent intakes for contamination (Ref. AMM TASK 28-12-47-200-001). If you find contamination:	X
	(1) Get a sample of fuel from the water drain valves and do a check for particle contamination (Ref. AMM TASK 12-32-28-281-803). If you find contamination:	X
	(a) Clean the fuel tanks.		X
B.	Examine the refuel/defuel control panel for contamination. If you find contamination:	X
	(1) Clean the refuel/defuel control panel.		X
C.	Examine the refuel/defuel coupling and the refuel/defuel coupling cap for contamination. If you find contamination:	X
	(1) Clean the refuel/defuel coupling and the refuel/defuel coupling cap.		X
D.	Examine the overwing refuel adaptor /cap for contamination. If you find contamination:	X
	(1) Clean the overwing refuel adaptor/cap.		X
E.	Examine the fuel drain mast for contamination (Ref. AMM TASK 28-13-00-200-001). If you find contamination:	X
	(1) Clean the fuel drain mast.		X

Subtask 05-51-25-210-088-A ** ON A/C NOT FOR ALL

I. Inspection of the Anti-Ice System

NOTE: If the anti-ice system was off during or after the event, this inspection is not necessary.

ITEM	INSPECTION TASKS	PHASE 1	PHASE 2	PHASE 3
1.	Inspection of the Anti-Ice System
A.	Examine the air inlet and the outlet of the pre-cooler for contamination.	X
	If you find contamination: (1) If the anti-ice system was not in operation during or after volcanic ash contamination:
	(a) Disconnect and remove the duct immediately upstream of the wing anti-ice valve.		X
	(b) Examine the valve for contamination. If you find contamination:		X
	- Clean the ducts upstream of the wing anti-ice valve.			X
	- Clean the valve and replace the valve filter (Ref. AMM TASK 30-11-51-000-001) (Ref. AMM TASK 30-11-51-400-001) (Ref. AMM TASK 30-11-51-000-002) (Ref. AMM TASK 30-11-51-400-002).			X
	(2) If the anti-ice system was in operation during or immediately after volcanic ash contamination:
	(a) Remove the valve filter and install a clean filter (Ref. AMM TASK 30-11-51-000-001) (Ref. AMM TASK 30-11-51-400-001) (Ref. AMM TASK 30-11-51-000-002) (Ref. AMM TASK 30-11-51-400-002).		X
	(b) Disconnect the anti-ice duct from the telescopic duct and examine it for contamination. If you find contamination:		X
	- Clean all the anti-ice ducts from the pylon interface to the telescopic duct outlet.			X
	- Clean the wing anti-ice valve.			X
	- Examine the slat anti-ice duct outlets for contamination. Clean them if necessary.			X
	(c) Disconnect the slat inter- connecting ducts and examine them for contamination. If you find contamination:		X
	- Remove the slats for component maintenance (Ref. AMM TASK 27-84-63-000-001) (Ref. AMM TASK 27-84-63-400-002) (Ref. AMM TASK 27-84-64-000-001) (Ref. AMM TASK 27-84-64-400-002) (Ref. AMM TASK 27-84-65-000-001) (Ref. AMM TASK 27-84-65-400-002) (Ref. AMM TASK 27-84-66-000-001) (Ref. AMM TASK 27-84-66-400-002) (Ref. AMM TASK 27-84-67-000-001) (Ref. AMM TASK 27-84-67-400-002).			X
	(d) Make sure that the telescopic duct operates correctly and examine it for contamination If you find contamination:		X
	- Remove the telescopic duct for component maintenance (Ref. AMM TASK 30-11-41-000-001) (Ref. AMM TASK 30-11-41-400-001).			X
B.	Examine the nacelle anti-ice valves for contamination (Ref. AMM TASK 30-21-51-000-040) (Ref. AMM TASK 30-21-51-400-041). If you find contamination:	X
	(1) Clean the ducts.		X

Subtask 05-51-25-210-085-B ** ON A/C NOT FOR ALL

J. Inspection of the Air Conditioning System

ITEM	INSPECTION TASKS	PHASE 1	PHASE 2
1.	Inspection of the air conditioning system
A.	Examine the high-pressure bleed valves for contamination (Ref. AMM TASK 36-11-51-000-040) (Ref. AMM TASK 36-11-51-400-040). If you find contamination:	X
	(1) Clean the ducts.		X
B.	Examine the bleed pressure regulator-valves for contamination (Ref. AMM TASK 36-11-52-000-040) (Ref. AMM TASK 36-11-52-400-040). If you find contamination:	X
	(1) Clean the ducts.		X
C.	Examine the crossbleed valve for contamination (Ref. AMM TASK 36-12-52-000-001) (Ref. AMM TASK 36-12-52-400-001). If you find contamination:	X
	(1) Clean the ducts.		X
	(2) Replace the crossbleed valve.		X
D.	Examine the flow control valves for contamination (Ref. AMM TASK 21-51-51-000-001) (Ref. AMM TASK 21-51-51-400-001). If you find contamination:	X
	(1) Clean the ducts.		X
E.	Examine the primary heat exchangers, the main heat exchangers, the condensers, the reheaters and the water extractors for contamination. If you find contamination:	X
	(1) Clean the related component (refer to the manufacturer's instructions for the cleaning procedure).		X
F.	Examine the trim-air pressure regulating-valve for contamination (Ref. AMM TASK 21-63-52-000-001) (Ref. AMM TASK 21-63-52-400-001). If you find contamination:	X
	(1) Clean the ducts.		X
	(2) Replace the filter.		X
G.	Examine the recirculation filters for contamination (Ref. AMM TASK 21-21-41-000-001) (Ref. AMM TASK 21-21-41-400-001). If you find contamination:	X
	(1) Replace the recirculation filters.		X
H.	Examine the water-extractor drain lines for contamination and blockage.	X

Subtask 05-51-25-210-088-B ** ON A/C NOT FOR ALL

K. Inspection of the Anti-Ice System

NOTE: If the anti-ice system was off during or after the event, this inspection is not necessary.

ITEM	INSPECTION TASKS	PHASE 1	PHASE 2	PHASE 3
1.	Inspection of the Anti-Ice System
A.	Examine the air inlet and the outlet of the pre-cooler for contamination.	X
	If you find contamination: (1) If the anti-ice system was not in operation during or after volcanic ash contamination:
	(a) Disconnect and remove the duct immediately upstream of the wing anti-ice valve.		X
	(b) Examine the valve for contamination. If you find contamination:		X
	- Clean the ducts upstream of the wing anti-ice valve.			X
	- Clean the valve and replace the valve filter (Ref. AMM TASK 30-11-51-000-001) (Ref. AMM TASK 30-11-51-400-001) (Ref. AMM TASK 30-11-51-000-002) (Ref. AMM TASK 30-11-51-400-002).			X
	(2) If the anti-ice system was in operation during or immediately after volcanic ash contamination:
	(a) Remove the valve filter and install a clean filter (Ref. AMM TASK 30-11-51-000-001) (Ref. AMM TASK 30-11-51-400-001) (Ref. AMM TASK 30-11-51-000-002) (Ref. AMM TASK 30-11-51-400-002).		X
	(b) Disconnect the anti-ice duct from the telescopic duct and examine it for contamination. If you find contamination:		X
	- Clean all the anti-ice ducts from the pylon interface to the telescopic duct outlet.			X
	- Clean the wing anti-ice valve.			X
	- Examine the slat anti-ice duct outlets for contamination. Clean them if necessary.			X
	(c) Disconnect the slat inter- connecting ducts and examine them for contamination. If you find contamination:		X
	- Remove the slats for component maintenance (Ref. AMM TASK 27-84-63-000-001) (Ref. AMM TASK 27-84-63-400-002) (Ref. AMM TASK 27-84-64-000-001) (Ref. AMM TASK 27-84-64-400-002) (Ref. AMM TASK 27-84-65-000-001) (Ref. AMM TASK 27-84-65-400-002) (Ref. AMM TASK 27-84-66-000-001) (Ref. AMM TASK 27-84-66-400-002) (Ref. AMM TASK 27-84-67-000-001) (Ref. AMM TASK 27-84-67-400-002).			X
	(d) Make sure that the telescopic duct operates correctly and examine it for contamination. If you find contamination:		X
	- Remove the telescopic duct for component maintenance (Ref. AMM TASK 30-11-41-000-001) (Ref. AMM TASK 30-11-41-400-001).			X
B.	Examine the nacelle anti-ice valves for contamination (Ref. AMM TASK 30-21-51-000-010) (Ref. AMM TASK 30-21-51-400-010).	X
	(1) Clean the ducts.		X

Subtask 05-51-25-210-085-A ** ON A/C NOT FOR ALL

L. Inspection of the Air Conditioning System

ITEM	INSPECTION TASKS	PHASE 1	PHASE 2
1.	Inspection of the air conditioning system
A.	Examine the high-pressure bleed valves for contamination (Ref. AMM TASK 36-11-51-000-010) (Ref. AMM TASK 36-11-51-400-010). If you find contamination:	X
	(1) Clean the ducts.		X
B.	Examine the bleed pressure regulator-valves for contamination (Ref. AMM TASK 36-11-52-000-010) (Ref. AMM TASK 36-11-52-400-010). If you find contamination:	X
	(1) Clean the ducts.		X
C.	Examine the crossbleed valve for contamination (Ref. AMM TASK 36-12-52-000-001) (Ref. AMM TASK 36-12-52-400-001). If you find contamination:	X
	(1) Clean the ducts.		X
	(2) Replace the crossbleed valve.		X
D.	Examine the flow control valves for contamination (Ref. AMM TASK 21-51-51-000-001) (Ref. AMM TASK 21-51-51-400-001). If you find contamination:	X
	(1) Clean the ducts.		X
E.	Examine the primary heat exchangers, the main heat exchangers, the condensers, the reheaters and the water extractors for contamination. If you find contamination:	X
	(1) Clean the related component (refer to the manufacturer's instructions for the cleaning procedure).		X
F.	Examine the trim-air pressure regulating-valve for contamination (Ref. AMM TASK 21-63-52-000-001) (Ref. AMM TASK 21-63-52-400-001). If you find contamination:	X
	(1) Clean the ducts.		X
	(2) Replace the filter.		X
G.	Examine the recirculation filters for contamination (Ref. AMM TASK 21-21-41-000-001) (Ref. AMM TASK 21-21-41-400-001). If you find contamination:	X
	(1) Replace the recirculation filters.		X
H.	Examine the water-extractor drain lines for contamination and blockage.	X

Subtask 05-51-25-210-088-C ** ON A/C NOT FOR ALL

M. Inspection of the Anti-Ice System

NOTE: If the anti-ice system was off during or after the event, this inspection is not necessary.

ITEM	INSPECTION TASKS	PHASE 1	PHASE 2	PHASE 3
1.	Inspection of the Anti-Ice System
A.	Examine the air inlet and the outlet of the pre-cooler for contamination. If you find contamination: (1) If the anti-ice system was not in operation during or after volcanic ash contamination:	X
	(a) Disconnect and remove the duct immediately upstream of the wing anti-ice valve.		X
	(b) Examine the valve for contamination. If you find contamination:		X
	- Clean the ducts upstream of the wing anti-ice valve.			X
	- Clean the valve and replace the valve filter (Ref. AMM TASK 30-11-51-000-001) (Ref. AMM TASK 30-11-51-400-001) (Ref. AMM TASK 30-11-51-000-002) (Ref. AMM TASK 30-11-51-400-002).			X
	(2) If the anti-ice system was in operation during or immediately after volcanic ash contamination:
	(a) Remove the valve filter and install a clean filter (Ref. AMM TASK 30-11-51-000-001) (Ref. AMM TASK 30-11-51-400-001) (Ref. AMM TASK 30-11-51-000-002) (Ref. AMM TASK 30-11-51-400-002).		X
	(b) Disconnect the anti-ice duct from the telescopic duct and examine it for contamination. If you find contamination:		X
	- Clean all the anti-ice ducts from the pylon interface to the telescopic duct outlet.			X
	- Clean the wing anti-ice valve.			X
	- Examine the slat anti-ice duct outlets for contamination. Clean them if necessary.			X
	(c) Disconnect the slat inter- connecting ducts and examine them for contamination. If you find contamination:		X
	- Remove the slats for component maintenance (Ref. AMM TASK 27-84-63-000-001) (Ref. AMM TASK 27-84-63-400-002) (Ref. AMM TASK 27-84-64-000-001) (Ref. AMM TASK 27-84-64-400-002) (Ref. AMM TASK 27-84-65-000-001) (Ref. AMM TASK 27-84-65-400-002) (Ref. AMM TASK 27-84-66-000-001) (Ref. AMM TASK 27-84-66-400-002) (Ref. AMM TASK 27-84-67-000-001) (Ref. AMM TASK 27-84-67-400-002).			X
	(d) Make sure that the telescopic duct operates correctly and examine it for contamination. If you find contamination:		X
	- Remove the telescopic duct for component maintenance (Ref. AMM TASK 30-11-41-000-001) (Ref. AMM TASK 30-11-41-400-001).			X
B.	Examine the nacelle anti-ice valves for contamination (Ref. AMM TASK 30-21-51-000-041) (Ref. AMM TASK 30-21-51-400-042). If you find contamination:	X
	(1) Clean the ducts.		X

Subtask 05-51-25-210-085-C ** ON A/C NOT FOR ALL

N. Inspection of the Air Conditioning System

ITEM	INSPECTION TASKS	PHASE 1	PHASE 2
1.	Inspection of the air conditioning system
A.	Examine the high-pressure bleed valves for contamination (Ref. AMM TASK 36-11-51-000-042) (Ref. AMM TASK 36-11-51-400-042). If you find contamination:	X
	(1) Clean the ducts.		X
B.	Examine the bleed pressure regulator-valves for contamination (Ref. AMM TASK 36-11-52-000-042) (Ref. AMM TASK 36-11-52-400-042). If you find contamination:	X
	(1) Clean the ducts.		X
C.	Examine the crossbleed valve for contamination (Ref. AMM TASK 36-12-52-000-001) (Ref. AMM TASK 36-12-52-400-001). If you find contamination:	X
	(1) Clean the ducts.		X
	(2) Replace the crossbleed valve.		X
D.	Examine the flow control valves for contamination (Ref. AMM TASK 21-51-51-000-001) (Ref. AMM TASK 21-51-51-400-001). If you find contamination:	X
	(1) Clean the ducts.		X
E.	Examine the primary heat exchangers, the main heat exchangers, the condensers, the reheaters and the water extractors for contamination. If you find contamination:	X
	(1) Clean the related component (refer to the manufacturer's instructions for the cleaning procedure).		X
F.	Examine the trim-air pressure regulating-valve for contamination (Ref. AMM TASK 21-63-52-000-001) (Ref. AMM TASK 21-63-52-400-001). If you find contamination:	X
	(1) Clean the ducts.		X
	(2) Replace the filter.		X
G.	Examine the recirculation filters for contamination (Ref. AMM TASK 21-21-41-000-001) (Ref. AMM TASK 21-21-41-400-001). If you find contamination:	X
	(1) Replace the recirculation filters.		X
H.	Examine the water-extractor drain lines for contamination and blockage.	X

Subtask 05-51-25-210-088-E ** ON A/C NOT FOR ALL

O. Inspection of the Anti-Ice System

NOTE: If the anti-ice system was off during or after the event, this inspection is not necessary.

ITEM	INSPECTION TASKS	PHASE 1	PHASE 2	PHASE 3
1.	Inspection of the Anti-Ice System
A.	Examine the air inlet and the outlet of the pre-cooler for contamination. If you find contamination: (1) If the anti-ice system was not in operation during or after volcanic ash contamination:	X
	(a) Disconnect and remove the duct immediately upstream of the wing anti-ice valve.		X
	(b) Examine the valve for contamination. If you find contamination:		X
	- Clean the ducts upstream of the wing anti-ice valve.			X
	- Clean the valve and replace the valve filter (Ref. AMM TASK 30-11-51-000-001) (Ref. AMM TASK 30-11-51-400-001) (Ref. AMM TASK 30-11-51-000-002) (Ref. AMM TASK 30-11-51-400-002).			X
	(2) If the anti-ice system was in operation during or immediately after volcanic ash contamination:
	(a) Remove the valve filter and install a clean filter (Ref. AMM TASK 30-11-51-000-001) (Ref. AMM TASK 30-11-51-400-001) (Ref. AMM TASK 30-11-51-000-002) (Ref. AMM TASK 30-11-51-400-002).		X
	(b) Disconnect the anti-ice duct from the telescopic duct and examine it for contamination. If you find contamination:		X
	- Clean all the anti-ice ducts from the pylon interface to the telescopic duct outlet.			X
	- Clean the wing anti-ice valve.			X
	- Examine the slat anti-ice duct outlets for contamination. Clean them if necessary.			X
	(c) Disconnect the slat inter- connecting ducts and examine them for contamination. If you find contamination:		X
	- Remove the slats for component maintenance (Ref. AMM TASK 27-84-63-000-001) (Ref. AMM TASK 27-84-63-400-002) (Ref. AMM TASK 27-84-64-000-001) (Ref. AMM TASK 27-84-64-400-002) (Ref. AMM TASK 27-84-65-000-001) (Ref. AMM TASK 27-84-65-400-002) (Ref. AMM TASK 27-84-66-000-001) (Ref. AMM TASK 27-84-66-400-002) (Ref. AMM TASK 27-84-67-000-001) (Ref. AMM TASK 27-84-67-400-002).			X
	(d) Make sure that the telescopic duct operates correctly and examine it for contamination. If you find contamination:		X
	- Remove the telescopic duct for component maintenance (Ref. AMM TASK 30-11-41-000-001) (Ref. AMM TASK 30-11-41-400-001).			X
B.	Examine the nacelle anti-ice valves for contamination (Ref. AMM TASK 30-21-51-000-802) and (Ref. AMM TASK 30-21-51-000-803) (Ref. AMM TASK 30-21-51-400-802) and (Ref. AMM TASK 30-21-51-400-803). If you find contamination:	X
	(1) Clean the ducts.		X

Subtask 05-51-25-210-085-E ** ON A/C NOT FOR ALL

P. Inspection of the Air Conditioning System

ITEM	INSPECTION TASKS	PHASE 1	PHASE 2
1.	Inspection of the air conditioning system
A.	Examine the high-pressure bleed valves for contamination (Ref. AMM TASK 36-11-51-000-802) (Ref. AMM TASK 36-11-51-400-802). If you find contamination:	X
	(1) Clean the ducts.		X
B.	Examine the bleed pressure regulator-valves for contamination (Ref. AMM TASK 36-11-52-000-802) (Ref. AMM TASK 36-11-52-400-802). If you find contamination:	X
	(1) Clean the ducts.		X
C.	Examine the crossbleed valve for contamination (Ref. AMM TASK 36-12-52-000-001) (Ref. AMM TASK 36-12-52-400-001). If you find contamination:	X
	(1) Clean the ducts.		X
	(2) Replace the crossbleed valve.		X
D.	Examine the flow control valves for contamination (Ref. AMM TASK 21-51-51-000-001) (Ref. AMM TASK 21-51-51-400-001). If you find contamination:	X
	(1) Clean the ducts.		X
E.	Examine the primary heat exchangers, the main heat exchangers, the condensers, the reheaters and the water extractors for contamination. If you find contamination:	X
	(1) Clean the related component (refer to the manufacturer's instructions for the cleaning procedure).		X
F.	Examine the trim-air pressure regulating-valve for contamination (Ref. AMM TASK 21-63-52-000-001) (Ref. AMM TASK 21-63-52-400-001). If you find contamination:	X
	(1) Clean the ducts.		X
	(2) Replace the filter.		X
G.	Examine the recirculation filters for contamination (Ref. AMM TASK 21-21-41-000-001) (Ref. AMM TASK 21-21-41-400-001). If you find contamination:	X
	(1) Replace the recirculation filters.		X
H.	Examine the water-extractor drain lines for contamination and blockage.	X

Subtask 05-51-25-210-084-D ** ON A/C NOT FOR ALL

Q. Inspection of the Hydraulic System

NOTE: If engine 1, the air ground connectors and the bleed system were not in operation during the event, this inspection is not necessary.

ITEM	INSPECTION TASKS	PHASE 1	PHASE 2	PHASE 3
1.	Inspection of the Hydraulic System
A.	Examine the clogging indicator of the filter of the reservoir pressurization unit (1360GM). If the red indicator button is out:	X
	(1) Examine the filters for contamination (clogging indicators and filter elements). (Ref. AMM TASK 29-10-00-210-002) (Ref. AMM TASK 29-10-00-200-007). If you find contamination:		X
	(a) Replace the filter elements.			X
	(2) Replace the filter element of the water separator (Ref. AMM TASK 29-14-42-000-002) (Ref. AMM TASK 29-14-42-400-002).		X
	(3) Get a sample of fluid and make sure that contamination is in the permitted limits (Ref. AMM TASK 12-32-29-281-001).		X

Subtask 05-51-25-210-084-E ** ON A/C NOT FOR ALL

Q. Inspection of the Hydraulic System

NOTE: If engine 1, the air ground connectors and the bleed system were not in operation during the event, this inspection is not necessary.

ITEM	INSPECTION TASKS	PHASE 1	PHASE 2	PHASE 3
1.	Inspection of the Hydraulic System
A.	Examine the clogging indicator of the filter of the reservoir pressurization unit (1360GM). If the red indicator button is out:	X
	(1) Examine the filters for contamination (clogging indicators and filter elements). (Ref. AMM TASK 29-10-00-210-002) (Ref. AMM TASK 29-10-00-200-006). If you find contamination:		X
	(a) Replace the filter elements.			X
	(2) Replace the filter element of the water separator (Ref. AMM TASK 29-14-42-000-002) (Ref. AMM TASK 29-14-42-400-002).		X
	(3) Get a sample of fluid and make sure that contamination is in the permitted limits (Ref. AMM TASK 12-32-29-281-001).		X

Subtask 05-51-25-210-084-H ** ON A/C NOT FOR ALL

Q. Inspection of the Hydraulic System

NOTE: If engine 1, the air ground connectors and the bleed system were not in operation during the event, this inspection is not necessary.

ITEM	INSPECTION TASKS	PHASE 1	PHASE 2	PHASE 3
1.	Inspection of the Hydraulic System
A.	Examine the clogging indicator of the filter of the reservoir pressurization unit (1360GM). If the red indicator button is out:	X
	(1) Examine the filters for contamination (clogging indicators and filter elements) (Ref. AMM TASK 29-10-00-210-002) (Ref. AMM TASK 29-13-43-200-802) and (Ref. AMM TASK 29-11-43-200-802). If you find contamination:		X
	(a) Replace the filter elements.			X
	(2) Replace the filter element of the water separator (Ref. AMM TASK 29-14-42-000-002) (Ref. AMM TASK 29-14-42-400-002).		X
	(3) Get a sample of fluid and make sure that contamination is in the permitted limits (Ref. AMM TASK 12-32-29-281-001).		X

Subtask 05-51-25-210-104-A

R. Inspection of the Ram Air Turbine (RAT)

ITEM	INSPECTION TASKS	PHASE 1	PHASE 2
1.	Inspection of the RAT
A.	Examine the RAT for contamination and/or damage:	X
	(1) Do an extension of the RAT on the ground (Ref. AMM TASK 29-22-00-869-001).
	(2) Do a visual inspection to make sure that there is no volcanic ash: - On the RAT - In the RAT compartment - On the RAT actuator - On the RAT door - On the RAT blades.
	(3) Turn the turbine blades manually and make sure that they turn freely. If you find contamination:
	(a) Remove the volcanic ash with the VACUUM CLEANER, Textile-Lint free Cotton - (Material No.14SBA1) , the BRUSH - BRISTLED, SOFT.		X
	(4) Do a retraction of the RAT on the ground (Ref. AMM TASK 29-22-00-869-002).	X

Subtask 05-51-25-210-086-A

S. Inspection of the Potable Water System (PWS)

NOTE: If the aircraft was on the ground with the applicable protective covers/devices installed when the volcanic ash contamination occurred and there is no volcanic ash behind the covers, this inspection is not necessary.

NOTE: If the engines, the air ground connectors and the bleed system were not in operation during the event, this inspection is not necessary.

ITEM	INSPECTION TASKS	PHASE 1	PHASE 2
1.	Inspection of the PWS
A.	Examine the air filter [4210MM] for contamination (Ref. AMM TASK 38-41-00-610-001). If you find contamination:	X
	(a) Replace the filter element (Ref. AMM TASK 38-41-00-610-001).		X
	(b) Drain the PWS, flush and refill with potable water (Ref. AMM TASK 12-24-38-680-001) or (Ref. AMM TASK 12-24-38-680-002) and (Ref. AMM TASK 12-15-38-613-001) or (Ref. AMM TASK 12-15-38-613-002).		X

Subtask 05-51-25-210-099-A ** ON A/C NOT FOR ALL

T. Inspection of the Inerting Gas Generation System (IGGS)
(Ref. AMM TASK 47-31-34-740-001).

ITEM	INSPECTION TASKS	PHASE 1	PHASE 2	PHASE 3
1.	Inspection of the Inerting Gas Generation System (IGGS)
A.	If the IGGS was not in operation during or after volcanic ash contamination:
	(1) Disconnect and remove the gate valve (Ref. AMM TASK 47-21-41-000-001).	X
	(2) Examine the gate valve for contamination. If you find contamination:	X
	(a) Clean the ducts upstream of the gate valve.		X
	(b) Clean the gate valve.		X
	(3) Install the gate valve (Ref. AMM TASK 47-21-41-400-001).	X
B.	If the IGGS was in operation during or immediately after volcanic ash contamination:
	(1) Replace the filter element (Ref. AMM TASK 47-10-41-920-001).	X
	(2) Examine the filter element for contamination. If you find contamination:	X
	(a) Remove the gate valve (Ref. AMM TASK 47-21-41-000-001).		X
	(b) Clean the ducts upstream/downstream of the gate valve.		X
	(c) Clean the gate valve.		X
	(d) Clean the filter assembly.		X
	(e) Install the gate valve (Ref. AMM TASK 47-21-41-400-001).		X
	(3) Examine the Air Separation Module (ASM) (air inlet, Oxygen Enriched Air (OEA) outlet and Nitrogen Enriched Air (NEA) outlet) for contamination. If you find contamination:	X
	(a) Replace the ASM (Ref. AMM TASK 47-10-43-920-001).		X
	(b) Remove the Dual Flow and Shut-Off Valve (DFSOV) (Ref. AMM TASK 47-21-43-000-001).		X
	(c) Examine the DFSOV for contamination. If you find contamination:		X
	- Clean the ducts from the ASM to the DFSOV.			X
	- Clean the DFSOV.			X
	(d) Install the DFSOV (Ref. AMM TASK 47-21-43-400-001).		X
	(e) Remove the Dual Flapper Check Valve (DFCV) (Ref. AMM TASK 47-20-43-000-001).		X
	(f) Examine the DFCV for contamination. If you find contamination:		X
	- Clean the ducts from the DFSOV to the DFCV inlet.			X
	- Clean the DFCV.			X
	(g) Install the DFCV (Ref. AMM TASK 47-20-43-400-001).		X

5. Close-up
Subtask 05-51-25-160-058-A

A. Cleaning of the Aircraft
(1) Clean the aircraft internally if necessary.
(2) Clean the aircraft externally if necessary (Ref. AMM TASK 12-21-11-615-002).

Subtask 05-51-25-866-055-A

B. Retraction of the Flight Control Surfaces
(1) Retract the flaps (Ref. AMM TASK 27-50-00-866-009).
(2) Retract the slats (Ref. AMM TASK 27-80-00-866-005).
(3) Retract the spoilers (Ref. AMM TASK 27-60-00-866-002).

Subtask 05-51-25-410-053-A

C. Close Access
(1) Make sure that the work area is clean and clear of tools and other items.
(2) Close the NLG doors (Ref. AMM TASK 32-22-00-410-001).
(3) Close the MLG doors (Ref. AMM TASK 32-12-00-410-001).
(4) Close all the access doors, and the access panels opened during the inspection procedure.
(5) Remove the access platform(s).
(6) Remove the WARNING NOTICE(S).

Subtask 05-51-25-860-054-A

D. Put the aircraft back to its initial configuration.
(1) De-energize the aircraft electrical circuits (Ref. AMM TASK 24-41-00-862-002).
(2) Remove the access platform(s).
(3) Remove the WARNING NOTICE(S).

[Rev.10 from 2021] 2026.03.31 22:51:44 UTC