DOC AIRBUS | AMM A320FDe-Preservation of the Aircraft after a Sand/Dust Storm or Volcanic Ash Conditions on the Ground
TASK 10-11-00-553-802-A
De-Preservation of the Aircraft after a Sand/Dust Storm or Volcanic Ash Conditions on the Ground
This procedure gives the information about the de-preservation of the aircraft after a sand/dust storm or volcanic ash condition.
You must remove the protection as soon as possible after the sand/dust storm or volcanic ash condition.
2. Job Set-up Information
A. Fixtures, Tools, Test and Support Equipment
B. Consumable Materials
C. Referenced Information
3. Job Set-up
Subtask 10-11-00-210-069-A
Subtask 10-11-00-160-050-A
Subtask 10-11-00-942-065-A
[Rev.10 from 2021]
2026.03.31 22:53:20 UTC
De-Preservation of the Aircraft after a Sand/Dust Storm or Volcanic Ash Conditions on the Ground
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.
WARNING:
BEFORE YOU START WORK, YOU MUST PUT ON A SAFETY HARNESS AND ATTACH IT TO THE ACCESS PLATFORM. WITHOUT A SAFETY HARNESS, YOU CAN FALL. THIS CAN KILL YOU OR CAUSE YOU INJURY.
WARNING:
BE CAREFUL WHEN YOU USE CONSUMABLE MATERIALS. OBEY THE MATERIAL MANUFACTURER'S INSTRUCTIONS AND YOUR LOCAL REGULATIONS.
CAUTION:
BEFORE YOU DO WORK ON AN EXTERNAL SURFACE OF THE AIRCRAFT, MAKE SURE THAT THIS SURFACE HAS A CORRECT PROTECTION. IF THE PROTECTION IS NOT CORRECT, YOU CAN CAUSE DAMAGE TO THE SURFACE.
1. Reason for the JobThis procedure gives the information about the de-preservation of the aircraft after a sand/dust storm or volcanic ash condition.
You must remove the protection as soon as possible after the sand/dust storm or volcanic ash condition.
2. Job Set-up Information
A. Fixtures, Tools, Test and Support Equipment
| REFERENCE | QTY | DESIGNATION |
|---|---|---|
| No specific | 1 | ACCESS PLATFORM 8M (26 FT) - ADJUSTABLE |
| No specific | 1 | BLOWING EQUIPMENT - DRY AIR |
| No specific | AR | BRUSH - BRISTLED, SOFT |
| No specific | AR | FILM - POLYETHYLENE |
| No specific | AR | TAPE - ADHESIVE |
| No specific | 1 | VACUUM CLEANER |
| REFERENCE | DESIGNATION |
|---|---|
| (Material No.08BBB1) | Non Aqueous Cleaner-- Petroleum Based - |
| (Material No.14SBA1) | Textile-Lint free Cotton - |
| REFERENCE | DESIGNATION |
|---|---|
| TASK 05-51-25-200-002-A | Inspection after a Flight through a Sand/Dust Storm or after Sand/Dust 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 |
| 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 24-41-00-861-002-A | Energize the Aircraft Electrical Circuits from the External Power |
| TASK 24-41-00-861-002-A-01 | Energize the Aircraft Electrical Circuits from the APU |
| TASK 24-41-00-861-002-A-02 | Energize the Aircraft Electrical Circuits from Engine 1(2) |
| 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) |
Subtask 10-11-00-210-069-A
A. General
(2) The sand/dust and volcanic ash can stay:
(3) The texture of volcanic ash is almost the same as talcum powder.
(4) Volcanic ash is hard, very abrasive and acid (pH between 2 and neutral).
(5) Sand/dust and ash can cause erosion/abrasion, etching or shot-peening on the surfaces and can remove the finish/protection and thus cause damage/corrosion.
4. ProcedureNOTE: Definition of a sand/dust storm:
A sand/dust storm is an unusual condition in which strong winds blow large quantities of sand/dust into the air. A sand/dust storm goes on large areas and decreases visibility very much.
A sand/dust storm is an unusual condition in which strong winds blow large quantities of sand/dust into the air. A sand/dust storm goes on large areas and decreases visibility very much.
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 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 a volcanic ash environment can cause important damage to the engine and/or APU.
(1) The sand/dust and volcanic ash particles can be of different sizes, they can enter all openings and can go through many seals. Volcanic ash is small particles of rock powder that are blown out of a volcano. These particles can go into the atmosphere to 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 a volcanic ash environment can cause important damage to the engine and/or APU.
(2) The sand/dust and volcanic ash can stay:
- On all exposed lubricated surfaces
- In all corners
- In bottom positions.
(3) The texture of volcanic ash is almost the same as talcum powder.
(4) Volcanic ash is hard, very abrasive and acid (pH between 2 and neutral).
(5) Sand/dust and ash can cause erosion/abrasion, etching or shot-peening on the surfaces and can remove the finish/protection and thus cause damage/corrosion.
Subtask 10-11-00-160-050-A
A. Removal of Contamination from the External Surfaces of the Aircraft
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 sand/dust or volcanic ash contamination occurred) to let the water drain.
2 If no FILM - POLYETHYLENE was installed on the probes/sensors before the sand/dust or volcanic ash contamination occurred:
a Remove the contamination from the protection covers/devices (if installed before the sand/dust or volcanic ash contamination occurred) and their adjacent structure with a Textile-Lint free Cotton - (Material No.14SBA1) .
b If no protection covers/devices were installed on the probes/sensors before the sand/dust or volcanic ash contamination occurred:
1 Clean the top of the aircraft first and then the bottom.
3 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.
Subtask 10-11-00-555-086-A CAUTION:
DO NOT RUB THE SURFACE WHEN YOU REMOVE SAND/DUST OR VOLCANIC ASH FROM THE AIRCRAFT. IF YOU RUB THE SURFACE, YOU CAN CAUSE EROSION/ABRASION.
(1) Dry sand/dust or volcanic ash: CAUTION:
IF THERE IS DRY SAND/DUST OR VOLCANIC ASH, DO NOT USE FLUIDS TO REMOVE THE SAND/DUST OR THE VOLCANIC ASH. IF THERE IS A LAYER OF SAND/DUST OR VOLCANIC ASH ON THE AIRCRAFT SURFACES, REMOVE THE SAND/DUST OR VOLCANIC 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 SAND/DUST OR THE VOLCANIC 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 SAND/DUST OR VOLCANIC ASH WITH AN AIR BLOWER, MAKE SURE THAT THE SAND/DUST OR THE VOLCANIC ASH DOES NOT CAUSE CONTAMINATION OF THE OTHER COMPONENTS (PROBES, ETC.).
(a) If there is a layer of dry sand/dust or volcanic ash on the aircraft surfaces: - Remove the sand/dust or volcanic ash with a VACUUM CLEANER, a BLOWING EQUIPMENT - DRY AIR, a Textile-Lint free Cotton - (Material No.14SBA1) or a BRUSH - BRISTLED, SOFT.
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 sand/dust or 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 sand/dust or volcanic ash contamination occurred) to let the water drain.
2 If no FILM - POLYETHYLENE was installed on the probes/sensors before the sand/dust or volcanic ash contamination occurred:
a Remove the contamination from the protection covers/devices (if installed before the sand/dust or volcanic ash contamination occurred) and their adjacent structure with a Textile-Lint free Cotton - (Material No.14SBA1) .
b If no protection covers/devices were installed on the probes/sensors before the sand/dust or volcanic ash contamination occurred:
- Remove the contamination from the probes/sensors and their adjacent structure with a Textile-Lint free Cotton - (Material No.14SBA1) .
- Install the protection covers/devices (Ref. AMM TASK 10-11-00-555-013).
- 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.
- 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.
- 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.
NOTE: You can apply the FILM - POLYETHYLENE in a rectangular shape for the probes/sensors that are near 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.
1 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.
2 Carefully clean the recesses and empty spaces (cavities) on the aircraft (e.g. the slats, flaps, brakes, landing gears and landing gear bays) where particles can stay. 3 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.
B. Removal of the Protection
Primary Protection ** ON A/C NOT FOR ALL
Primary Protection ** ON A/C NOT FOR ALL
Primary Protection ** ON A/C NOT FOR ALL
Primary Protection on the Engines ** ON A/C NOT FOR ALL
Primary Protection on the Engines ** ON A/C NOT FOR ALL
Primary Protection on the Engines ** ON A/C NOT FOR ALL
Primary Protection on the Engines ** ON A/C NOT FOR ALL
Secondary Protection ** ON A/C NOT FOR ALL
Secondary Protection ** ON A/C NOT FOR ALL
Secondary Protection ** ON A/C NOT FOR ALL
Secondary Protection ** ON A/C NOT FOR ALL
(1) Put the ACCESS PLATFORM 8M (26 FT) - ADJUSTABLE in position near the aircraft.
(2) Refer to the recorded position and remove all the TAPE - ADHESIVE and FILM - POLYETHYLENE that you installed during the preservation procedure.
(3) Make sure that you record all the materials as removed.
(4) Remove all the signs of TAPE - ADHESIVE marks with a Textile-Lint free Cotton - (Material No.14SBA1) soaked with Non Aqueous Cleaner-- Petroleum Based - (Material No.08BBB1) .
(5) Remove the protection covers/devices (Ref. AMM TASK 10-11-00-555-014).
(6) Record all positions where you find the signs of contamination below the protection when you remove it.
This will help you prepare the inspection after a sand/dust storm or volcanic ash conditions in flight or on the ground (Ref. AMM TASK 05-51-25-200-002) and (Ref. AMM TASK 05-51-25-200-003).
Subtask 10-11-00-210-070-A Primary Protection ** ON A/C NOT FOR ALL Primary Protection ** ON A/C NOT FOR ALL Primary Protection ** ON A/C NOT FOR ALL Primary Protection on the Engines ** ON A/C NOT FOR ALL Primary Protection on the Engines ** ON A/C NOT FOR ALL Primary Protection on the Engines ** ON A/C NOT FOR ALL Primary Protection on the Engines ** ON A/C NOT FOR ALL Secondary Protection ** ON A/C NOT FOR ALL Secondary Protection ** ON A/C NOT FOR ALL Secondary Protection ** ON A/C NOT FOR ALL Secondary Protection ** ON A/C NOT FOR ALL (2) Refer to the recorded position and remove all the TAPE - ADHESIVE and FILM - POLYETHYLENE that you installed during the preservation procedure.
(3) Make sure that you record all the materials as removed.
(4) Remove all the signs of TAPE - ADHESIVE marks with a Textile-Lint free Cotton - (Material No.14SBA1) soaked with Non Aqueous Cleaner-- Petroleum Based - (Material No.08BBB1) .
(5) Remove the protection covers/devices (Ref. AMM TASK 10-11-00-555-014).
(6) Record all positions where you find the signs of contamination below the protection when you remove it.
This will help you prepare the inspection after a sand/dust storm or volcanic ash conditions in flight or on the ground (Ref. AMM TASK 05-51-25-200-002) and (Ref. AMM TASK 05-51-25-200-003).
C. Inspection
(1) After a sand/dust storm, do the inspection after a sand/dust storm condition in flight or on the ground (Ref. AMM TASK 05-51-25-200-002).
(2) After a volcanic ash condition, do the inspection after a volcanic ash condition in flight or on the ground (Ref. AMM TASK 05-51-25-200-003).
5. Close-up(1) After a sand/dust storm, do the inspection after a sand/dust storm condition in flight or on the ground (Ref. AMM TASK 05-51-25-200-002).
(2) After a volcanic ash condition, do the inspection after a volcanic ash condition in flight or on the ground (Ref. AMM TASK 05-51-25-200-003).
Subtask 10-11-00-942-065-A
A. Aircraft Maintenance Configuration
(1) Energize the aircraft electrical circuits
(Ref. AMM TASK 24-41-00-861-002).
(Ref. AMM TASK 24-41-00-862-002).
(4) Remove the WARNING NOTICE(S).
(5) Make an entry in the logbook.
(6) Remove the access platform(s).
(7) Remove all the fixtures, tools, test and support equipment used during this procedure.
(1) Energize the aircraft electrical circuits
(Ref. AMM TASK 24-41-00-861-002).
CAUTION:
MONITOR THE TEMPERATURE OF THE AVIONICS COMPARTMENT AND MAKE SURE THAT IT DOES NOT INCREASE TO MORE THAN 55 DEG.C DURING THE PROCEDURE.
(2) On the CABIN PRESS section of panel 25VU: - Lift the guard and release the DITCHING pushbutton switch (the ON legend goes off) to open the avionics ventilation overboard-valve and the outflow valves.
(Ref. AMM TASK 24-41-00-862-002).
(4) Remove the WARNING NOTICE(S).
(5) Make an entry in the logbook.
(6) Remove the access platform(s).
(7) Remove all the fixtures, tools, test and support equipment used during this procedure.