De-Icing of the Aircraft in Power-Off Condition

TASK 12-31-12-660-002-A
De-Icing of the Aircraft in Power-Off Condition

WARNING: BE CAREFUL WHEN YOU USE CONSUMABLE MATERIALS. OBEY THE MATERIAL MANUFACTURER'S INSTRUCTIONS AND YOUR LOCAL REGULATIONS.

CAUTION: BEFORE YOU START THE ENGINE OR YOU PRESSURIZE THE HYDRAULIC SYSTEMS, MAKE SURE THAT THERE IS NO ICE OR SNOW ON THE FLIGHT CONTROLS AREA (ELEVATOR, RUDDER AND AILERON). IF YOU DO NOT OBEY THIS PRECAUTION, DAMAGE TO THE FLIGHT CONTROL SYSTEM CAN OCCUR .

CAUTION: DO NOT TRY TO OPERATE THE FLIGHT CONTROL SURFACES IF THERE IS ICE ON THEM. IF YOU DO, YOU CAN CAUSE DAMAGE TO THE SYSTEM. SMALL SURFACE MOVEMENT IS PERMITTED AT HYDRAULIC POWER-UP OF AIRCRAFT.

CAUTION: DO NOT APPLY ANTI-ICING AND DE-ICING FLUID DIRECTLY IN:

THE PITOT, ICE DETECTION, STATIC PROBES AND THE AOA SENSORS
THE AIR INTAKES AND EXHAUSTS OF THE ENGINE AND THE APU
ALL OTHER AIR INTAKES OR OUTLETS.

IF YOU DO, ELECTRICAL MALFUNCTIONS AND/OR DAMAGE TO EQUIPMENT CAN OCCUR.

CAUTION: DO NOT USE JET EXHAUST TO REMOVE SNOW OR ICE FROM THE AIRFRAME. THE HIGH PRESSURE AND HIGH TEMPERATURE OF JET EXHAUST CAN CAUSE DAMAGE TO THE AIRCRAFT.

CAUTION: DO NOT POINT THE JETS DIRECTLY AT THE COCKPIT, CABIN AND DOOR WINDOWS. THE JETS CAN CAUSE CRAZING OF THE ACRYLIC AND CAN PUSH THE FLUID INTO THE WINDOW SEALS.

CAUTION: DO NOT USE HIGH-PRESSURE JETS OR VAPOR TO DO THE ANTI-ICING/ DE-ICING PROCEDURE. THIS TYPE OF EQUIPMENT CAN PUT FLUID IN PARTS, AND CAN CAUSE DAMAGE TO EQUIPMENT, SPECIALLY TO:

ELECTRICAL EQUIPMENT SUCH AS HARNESSES, PROXIMITY SENSORS AND CONNECTORS (WITH SHORT CIRCUITS OR INCORRECT INDICATIONS AS A RESULT)
EQUIPMENT SUCH AS GEAR BOX SEALS, STEADY BEARINGS, ROTARY ACTUATORS AND UNIVERSAL JOINTS.

HIGH PRESSURE JETS CAN PUSH LIQUIDS INTO BEARINGS, JOINTS, BRAKES, ELECTRICAL CONNECTORS AND OTHER SEALED COMPONENTS. LIQUIDS THAT GET INTO THESE AREAS CAN CAUSE CORROSION, FREEZE DURING AIRCRAFT FLIGHT, REMOVE NECESSARY LUBRICANTS OR START INCORRECT ELECTRICAL FUNCTIONS.

CAUTION: DO THIS PROCEDURE AT THE LAST POSSIBLE OPPORTUNITY BEFORE THE AIRCRAFT DEPARTURE. THE ANTI-ICING/DE-ICING MATERIAL HOLDOVER-TIME CAN DECREASE. THIS CAN OCCUR IN ONE (OR MORE) OF THESE CONDITIONS:

LOW TEMPERATURE
HEAVY PRECIPITATION
HEAVY MOISTURE
HIGH WIND SPEEDS
JET BLASTS
AN AIRCRAFT SKIN TEMPERATURE OF LESS THAN THE OAT.

1. Reason for the Job
This procedure gives guidelines for the removal of ice and snow from the aircraft.
This procedure is for an aircraft parked in an applicable de-icing area with:

The engines and APU stopped,
No Ground Power Unit (GPU) connected.

NOTE: All the data related to the fluids must be from the manufacture's recommendations for application and holdover times (supplied with the fluid). The ice protection procedures and all the data related to de-icing/anti-icing fluids are given in the latest edition of the Society of Automotive Engineers (SAE):

SAE AS 6285 (Aircraft Ground De-Icing/Anti-Icing Processes).
SAE AS 6286 (Training and Qualification Program for De-Icing/Anti-Icing of Aircraft on the Ground).

NOTE: The data given in this procedure are guidelines only.
The operators can use these guidelines and their experience and knowledge of the local weather conditions to help them to make decisions.
It is the responsibility of the operators to make the decision about the applicable protection procedures.

NOTE: On the ground, in specific weather conditions with very low temperatures, ice or snow accretion can occur in the lower part of the forward fuselage.
Ice or snow accretion can change the airflow.
This change can cause incorrect operation of the pitot probes, the static ports and the Angle Of Attack (AOA) sensors.
This can cause incorrect indications on the related cockpit instruments.

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

REFERENCE	QTY	DESIGNATION
No specific	1	BROOM
No specific	1	BRUSH - BRISTLED, SOFT
No specific	AR	CHOCK - WHEEL(S)
No specific	1	DE- ANTI-ICING EQUIPMENT - 12M (39 FT) SPRAYING HEIGHT
No specific	AR	FILM - POLYETHYLENE
No specific	AR	WARNING NOTICE(S)

B. Consumable Materials

REFERENCE	DESIGNATION
(Material No.03BDB9)	Mineral base Lubricating Oil-General & Water-displacing Preservative Low Temp. -

C. Referenced Information

REFERENCE	DESIGNATION
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 10-11-00-555-015-A	Procedure for the Installation of Wheel Chocks on Aircraft
TASK 12-31-00-600-001-A	Cold-Weather Maintenance Procedures
TASK 12-34-24-869-002-A	Aircraft Grounding (Earthing) for the Maintenance Operations
TASK 12-34-24-869-002-A-01	Aircraft Grounding (Earthing) during Transit, Turnaround or Overnight Stop
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)
TASK 27-50-00-866-009-A-01	Retraction of the Flaps/Slats on the Ground
TASK 32-00-00-481-001-A	Installation of the Safety Devices on the Landing Gears
De-Icing Fluid Application ** ON A/C NOT FOR ALL
De-Icing Fluid Application ** ON A/C NOT FOR ALL
De-Icing Fluid Application ** ON A/C NOT FOR ALL
De-Icing Fluid Application ** ON A/C NOT FOR ALL
De-Icing Fluid Application ** ON A/C NOT FOR ALL
De-Icing Fluid Application ** ON A/C NOT FOR ALL

3. Job Set-up
Subtask 12-31-12-660-075-A

A. De-Icing General Information
(1) Refer to (Ref. AMM TASK 12-31-00-600-001) for:

The definitions
The cold weather procedures
The de-icing and anti-icing guidelines
The materials that you can use
The general information on effects of icing
The de-icing and/or anti-icing equipment and materials.

Subtask 12-31-12-860-052-A

B. Aircraft Maintenance Configuration

CAUTION: DO THIS TASK IN A LOCATION WITH SUFFICIENT DRAINAGE FOR THE ANTI-ICING/DE-ICING FLUIDS OR MOVE THE AIRCRAFT BEFORE THE ENGINE START. THE ANTI-ICING/DE-ICING FLUIDS CAN MAKE A POOL UNDER THE ENGINE AIR INTAKE. THIS CAN CAUSE THE ANTI-ICING/DE-ICING MATERIALS TO GO INTO THE ENGINE AND PREVENT ITS CORRECT OPERATION.

(1) Park the aircraft on a flat surface. Make sure that the wheels of the NLG are on the aircraft axis and that the aircraft points into the wind.
(2) Make sure that the APU and the aircraft engines are stopped.
(3) Install the safety devices on the landing gears (Ref. AMM TASK 32-00-00-481-001).
(4) Put the CHOCK - WHEEL(S) in position (Ref. AMM TASK 10-11-00-555-015).
(5) Ground the aircraft (Ref. AMM TASK 12-34-24-869-002).
(6) Make sure that the slats, flaps and thrust reversers are retracted.
If they are not in correct position:
(a) Do an inspection of the slats, flaps and thrust reversers for contamination (snow, frost, ice or slush).
(b) If you find contamination, remove it.
(7) Energize the aircraft electrical circuits
(Ref. AMM TASK 24-41-00-861-002).
(8) If necessary, put the slats and flaps in retracted position (Ref. AMM TASK 27-50-00-866-009).
(9) If necessary, put the thrust reversers in retracted position.
(10) On the CABIN PRESS section of panel 25VU:

WARNING: BEFORE YOU PUSH THE DITCHING PUSHBUTTON SWITCH, MAKE SURE THAT THERE IS NO SUPPLY OF AIR TO THE AIRCRAFT THROUGH THE LOW PRESSURE CONNECTION. IF THERE IS A SUPPLY OF AIR, YOU CAN CAUSE UNWANTED PRESSURIZATION OF THE AIRCRAFT. THIS CAN CAUSE INJURY TO PERSONS AND/OR DAMAGE TO THE AIRCRAFT.

(a) Make sure that the MODE SEL pushbutton switch is in the AUTO position:

The FAULT and MAN legends of the MODE SEL pushbutton switch are off.

(b) Lift the guard and push the DITCHING pushbutton switch (the ON legend comes on).

NOTE: The upper ECAM Display Unit (DU) can show the VENT AVNCS SYS FAULT message. It is permitted to ignore this message, but it is necessary to do a reset (open and close) of the circuit breakers of the Avionics Equipment Ventilation Computer (AEVC) at the end of the procedure.

1 Put the WARNING NOTICE(S) in position to tell persons not to operate this pushbutton switch.

CAUTION: ALL PERSONS WHO GET ACCESS TO THE CARGO COMPARTMENT MUST REMOVE SNOW/ICE FROM THEIR SHOES AND CLOTHES. IF NOT, SNOW/ICE CAN GO ON THE CARGO COMPARTMENT LATCHES. THIS CAN CAUSE THE CARGO LOADING SYSTEM NOT TO OPERATE CORRECTLY.

(11) Put the WARNING NOTICE(S) in position to tell persons to remove snow or ice from their shoes and clothes before they go into the aircraft.
(12) De-energize the aircraft electrical circuits
(Ref. AMM TASK 24-41-00-862-002).
(13) Make sure that the landing gear doors, passenger/crew doors, cargo compartment doors, emergency exits, service doors and sliding windows are closed.
(14) If necessary, use the BRUSH - BRISTLED, SOFT to remove contamination (snow, frost, ice or slush) from the adjacent area before you close the doors and the windows.

Subtask 12-31-12-860-058-A

CAUTION: BEFORE YOU APPLY ANTI-ICING/DE-ICING FLUIDS, MAKE SURE THAT THE SUPPLY PRESSURE IS NOT MORE THAN THE SPECIFIED VALUES.

CAUTION: DO NOT MAKE THE ANTI-ICING/DE-ICING FLUID IN TANKS HOT TOO MANY TIMES OR FOR LONG PERIODS. IF YOU DO, THE QUANTITY OF WATER IN THE FLUID WILL DECREASE AND THERE WILL BE A POSSIBLE DEGRADATION OF THE FLUID PERFORMANCE.

C. Preparation of Equipment

NOTE: Refer to AC 5-9-0 for de-iced aircraft areas.

(1) Put the DE- ANTI-ICING EQUIPMENT - 12M (39 FT) SPRAYING HEIGHT in position. Make sure that the safety zone of the aircraft is clear. This is to make sure that the DE- ANTI-ICING EQUIPMENT - 12M (39 FT) SPRAYING HEIGHT moves easily.

NOTE: When used on the ramp, the DE- ANTI-ICING EQUIPMENT - 12M (39 FT) SPRAYING HEIGHT has a storage tank for the anti-icing/de-icing fluid. It is not permitted to mix other fluids with the anti-icing/de-icing fluid. The fluid must have the recommended concentration for the temperature to get a correct protection.

(2) On the DE- ANTI-ICING EQUIPMENT - 12M (39 FT) SPRAYING HEIGHT:
(a) Set the supply pressure to:

Not more than an impact pressure of 1.5 psi (0.1034 bar) on the radome, belly fairing, rudder and elevators
Not more than an impact pressure of 10 psi (0.6895 bar) on all other surfaces.

NOTE: Airbus recommends that you get the approval of the impact pressure values from the equipment manufacturer.

(b) Set the de-icing fluid temperature to the maximum of 90 deg.C (194 deg.F).

NOTE: The temperature of the de-icing fluid must be high as possible (but not more than the maximum temperature) to make the removal of the ice faster.

(3) It is permitted to use forced air or forced air mixed with de-icing fluid. The procedure and equipment must agree with SAE AIR6284.

4. Procedure
Subtask 12-31-12-660-067-A

A. Manual Snow Removal
(1) Use the BRUSH - BRISTLED, SOFT to remove the snow from:

The engine air intakes and exhausts,
The APU exhaust,
The landing gear (brakes, wheels, leg, etc.) and landing gear doors,
The outflow valve air-outlet,
The inlet and outlet of the avionics-compartment ventilation system,
The inlets and outlets of the air conditioning system,
The pitot probes,
The static probes,
The standby static probes,
The AOA sensors,
The Total Air Temperature (TAT) sensors,
The ice detectors (if installed).

(2) Install the aircraft protection equipment (Ref. AMM TASK 10-11-00-555-013).
(3) Install the FILM - POLYETHYLENE or equivalent on each landing gear wheel/brake.
(4) If the layer of snow is too thick, use the BROOM to remove most of the snow. Use the BROOM with soft bristles to prevent damage to the aircraft skin.
(5) At very low temperatures ( -15 deg.C (5 deg.F) and less), the effect of the fluid becomes less satisfactory.
If the temperature is less than -15 deg.C (5 deg.F), remove the contamination manually or with the forced air.

Subtask 12-31-12-660-088-A

CAUTION: DURING THE DE-ICING AND CLEANING PROCEDURES, MAKE SURE THAT THE HOT WATER OR HOT WATER/FLUID MIXTURES DO NOT CAUSE THE TEMPERATURE OF THE AIRCRAFT SKIN TO INCREASE TO MORE THAN +70°C. DO NOT USE STEAM. IF YOU DO NOT OBEY THESE PRECAUTIONS, YOU CAN CAUSE DAMAGE TO THE SURFACE OR TO PARTS.

CAUTION: FOR THIS SPECIAL PROCEDURE, MAKE SURE THAT YOU POINT THE SPRAYING EQUIPMENT NOZZLE FROM THE REAR TO THE FRONT OF THE AIRCRAFT. IF YOU DO NOT OBEY THIS PRECAUTION, THERE IS A RISK THAT THE DE-ICING FLUID WILL GO INTO THE PITOT PROBES.

B. De-icing from the Forward Frame of Passenger/Crew Door 1 to the Radome (included) with the Spraying Equipment

NOTE: This paragraph is applicable for removal of the ice, frost, slush or snow with the de-icing fluid from the forward frame of passenger/crew door 1 to the radome (included). It is also applicable for removal of the ice accretion in front of the pitot probes.
This is a special procedure to make sure that the de-icing fluid does not go into the pitot probes or the TAT sensors. It is not applicable for the other areas of the aircraft.

(1) De-icing fluid application

De-Icing Fluid Application ** ON A/C NOT FOR ALL

(a) You must apply the de-icing fluid directly from the rear to the front of the aircraft.
(b) Apply the de-icing fluid on the aircraft skin with the spray gun of the DE- ANTI-ICING EQUIPMENT - 12M (39 FT) SPRAYING HEIGHT. The spray gun nozzle must be at a distance of between 0.5 m (1.64 ft.) and 3 m (9.84 ft.) from the aircraft skin.

NOTE: At a distance more than 3 m (9.84 ft.), the effect of the de-icing fluid will not be satisfactory.

The standby static probes (1),
The pitot probes (3),
The TAT sensors (16),
The ice detectors (15) (if installed),
The cockpit windows (2) and
The cabin doors (9).

(3) To prevent the flow of de-icing fluid on the cockpit windows, remove the remaining de-icing fluid from the forward areas. You can clean the surface with clean water and a soft cloth.
(4) If you find the de-icing fluid on the cockpit windows, clean the windows with clean water and a soft cloth.
Do not use the wipers to clean the de-icing fluid from the windshield.
Be careful to remove all the de-icing fluid from the windshield, specially in the wiper area.

Subtask 12-31-12-660-089-A

C. De-icing from the Forward Frame of Passenger/Crew Door 1 to the Rear of the Aircraft with the Spraying Equipment

CAUTION: DO NOT APPLY THE DE-ICING OR ANTI-ICING FLUID DIRECTLY FROM THE REAR TO THE FRONT OF THE STRUCTURE OF THE AIRCRAFT (WINGS, HORIZONTAL STABILIZER AND ELEVATOR).

(1) De-icing fluid application:

De-Icing Fluid Application ** ON A/C NOT FOR ALL

(a) Make sure that there are covers on the landing gear wheels and brakes.
(b) You must apply the de-icing fluid directly from the front to the rear of the aircraft.
(c) Apply the de-icing fluid on the aircraft skin with the spray gun of the DE- ANTI-ICING EQUIPMENT - 12M (39 FT) SPRAYING HEIGHT. The spray gun nozzle must be at a distance of between 0.5 m (1.64 ft.) and 3 m (9.84 ft.) from the aircraft skin.

NOTE: At a distance more than 3 m (9.84 ft.), the effect of the de-icing fluid will not be satisfactory.

(d) Apply the de-icing fluid on the ice or snow accretion.
(e) Do not apply the de-icing fluid directly on:

The APU air intake (11) and exhaust (10)
The engine air intakes (7) and exhausts (8)
The inlets (6) and outlets (13) of the air conditioning system
The landing gears (brakes, wheels, leg, etc.) (12)
The static probes (4)
The AOA sensors (14)
The cabin windows (5) and
The cabin doors (9).

(f) Do not use too much de-icing fluid on the rudder, the elevator and the aileron servocontrol areas. Use sufficient de-icing fluid to remove the contamination (snow, frost, ice or slush).

CAUTION: IN THE TRIMMABLE HORIZONTAL STABILIZER (THS) AREA, BE SPECIALLY CAREFUL TO POINT THE SPRAY FROM THE FRONT TO THE REAR. IF YOU DO NOT OBEY THIS PRECAUTION, THE FLUID CAN GO INTO THE REAR FUSELAGE NON-PRESSURIZED COMPARTMENT AND CAUSE DAMAGE TO THE FLIGHT DATA RECORDER (FDR).

(g) In the Trimmable Horizontal Stabilizer (THS) area, carefully point the spray from the front to the rear of the aircraft.

NOTE: If you point the spray in the other direction (from the rear to the front), de-icing fluid can go into the THS or into the rear fuselage non-pressurized-compartment.

Subtask 12-31-12-210-059-A

D. Inspection after De-icing
(1) Make sure that there is no ice, ice ridges, frost, slush or snow on:

The radome and the forward fuselage, specially in front of the pitot probes, the static probes and the AOA sensors,
The fuselage,
The wings,
The fuel tank vents,
The flap and slat tracks,
The control surfaces,
The tail cone,
The vertical stabilizer,
The THS,
The APU air intake and exhaust,
The engine intakes and exhausts,
The ice detectors (if installed),
The TAT sensors,
The pitot probes,
The static probes,
The AOA sensors,
The inlet and outlet of the avionics-compartment ventilation system,
The inlets and outlets of the air conditioning system,
The outflow valve,
The landing gears and the landing gear doors.

NOTE: A thin layer of frost (less than 3 mm (0.1181 in.)) is permitted on the wing lower surfaces in cold soaked areas.
This is not applicable to the THS.

(2) Make sure that there is no remaining de-icing fluid on:

The pitot probes,
The static probes,
The APU inlet (clean the APU inlet if necessary).

(3) An aircraft that is prepared for flight must not have ice, snow, slush or frost on the areas that follow:

The leading edge devices
The control surfaces
The upper wing surfaces
The engines
The aerodynamically quiet areas and the flight control cavities.

NOTE: The aerodynamically quiet areas and the flight control cavities are the areas and low points which are not on the aerodynamic airflow, where water, snow and ice can collect.

Thin hoarfrost is permitted on the top surface of the fuselage if all the vents and ports are clear.

NOTE: Thin hoarfrost is usually a white crystalline deposit which usually occurs equally on the external surfaces during cold nights without clouds. It is sufficiently thin that you can see surface features (paint lines, markings or lettering) below it.

NOTE: A frost layer of a maximum thickness of 3.17 mm (0.12 in.) is permitted on the bottom side of the wing between the front and rear spars. This is applicable if there is no effect on the take-off performance and if cold fuel caused it (low fuel temperature, OAT above freezing and high humidity). This is not applicable to the bottom side of the THS.

Subtask 12-31-12-640-052-A

E. Lubrication
(1) If the control handle of the cargo compartment doors stays blocked, lubricate the handle and the latch with Mineral base Lubricating Oil-General & Water-displacing Preservative Low Temp. - (Material No.03BDB9) .

5. Close-up
Subtask 12-31-12-860-053-A

A. Put the aircraft back to its initial configuration.
(1) Energize the aircraft electrical circuits
(Ref. AMM TASK 24-41-00-861-002).
(2) On the CABIN PRESS section of panel 25VU:
(a) Remove the WARNING NOTICE(S).
(b) Release the DITCHING pushbutton switch (the ON legend goes off).
(c) Visually make sure that outflow valve 10HL is in the open position.

Subtask 12-31-12-865-053-A

B. If the VENT AVNCS SYS FAULT message is shown on the upper ECAM DU, do a reset of the AEVC circuit breaker:

PANEL	DESIGNATION	FIN	LOCATION
** ON A/C ALL
122VU	AIR COND/AVNCS/VENT/MONG	3HQ	Y17

Subtask 12-31-12-942-061-A

C. If you schedule an APU or engine start immediately after the de-icing operation:

Operate the APU or the engine(s) for some minutes
Wait for 5 minutes before you open the engine or APU bleed valve(s).

Subtask 12-31-12-942-057-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 aircraft protection equipment (Ref. AMM TASK 10-11-00-555-014) and clean the covers with water to remove all signs of de-icing fluid.
(3) Remove the ground support and maintenance equipment, the special and standard tools, materials used for protection and all other items.

[Rev.10 from 2021] 2026.04.01 04:25:08 UTC