Cold Weather Maintenance - Anti-Icing Protection

TASK 12-31-11-660-001-A
Cold Weather Maintenance - Anti-Icing Protection

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

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 the instructions to prevent the formation of ice in some zones (wings, vertical and horizontal stabilizers, rudder). It also gives instructions make the removal of snow from the aircraft easier.

NOTE: The source of all the data related to the fluids must be the manufacturer's recommendations for the 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 SAE standards available on the website www.sae.org:

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 operators must use the procedures applicable to their special operating procedures and requirements.

NOTE: The data given in this procedure are guidelines only.
These guidelines and their experience and knowledge of the local weather conditions help the operator to make the correct decision.
It is the responsibility of the operator to make the decision about the protection methods.

NOTE: The protection time will be shorter in very bad weather conditions.
High wind speeds and jet blast can cause damage to the protective film. If these conditions occur, the protection time will be much shorter.
The protection time can also be much shorter if the wind temperature is lower than the Outside Air Temperature (OAT).

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

REFERENCE	QTY	DESIGNATION
No specific	1	DE- ANTI-ICING EQUIPMENT - 12M (39 FT) SPRAYING HEIGHT
No specific	AR	FILM - POLYETHYLENE
No specific	1	WARNING NOTICE(S)

B. 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 12-31-12-660-002-A	De-Icing of the Aircraft in Power-Off Condition
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 32-00-00-481-001-A	Installation of the Safety Devices on the Landing Gears
Anti-Icing Fluid Application ** ON A/C NOT FOR ALL
Anti-Icing Fluid Application ** ON A/C NOT FOR ALL
Anti-Icing Fluid Application ** ON A/C NOT FOR ALL
Anti-Icing Fluid Application ** ON A/C NOT FOR ALL
Anti-Icing Fluid Application ** ON A/C NOT FOR ALL

3. Job Set-up
Subtask 12-31-11-660-058-A

A. Anti-Icing General Information
(1) If the aircraft comes to the gate with the flaps/slats in a position other than fully retracted:

You must do an inspection of these flaps/slats.
You must remove the ice before retraction, if necessary.

(2) Application limits:
Do not apply a new layer of anti-icing fluid directly on a layer applied before.
If you must apply new anti-icing protection before the subsequent flight, you must:

First, do the de-icing of the aircraft with a hot fluid solution of Type 1 fluid (Ref. AMM TASK 12-31-12-660-002).
Then, apply the anti-icing protection on the clean aircraft.

(3) Refer to (Ref. AMM TASK 12-31-00-600-001) for:

Definition,
Cold weather procedures,
De-icing and Anti-icing Guidelines,
Useable Materials,
General Information on Effects of Icing,
De-icing and/or Anti-icing Equipment and Materials.

Subtask 12-31-11-860-053-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 nose landing gear are on the aircraft axis and that the aircraft points into the wind.
(2) Install the safety devices on the landing gears (Ref. AMM TASK 32-00-00-481-001).
(3) Put the wheel chocks in position (Ref. AMM TASK 10-11-00-555-015).
(4) Ground the aircraft (Ref. AMM TASK 12-34-24-869-002).
(5) Energize the ground service network
(Ref. AMM TASK 24-41-00-861-002).
(6) Make sure that the flaps, the slats, the spoilers, the speed brakes and the thrust reversers are retracted.
(7) Make sure that the Auxiliary Power Unit (APU) and the engine bleed-air systems are stopped.
(8) 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 Electronic Centralized Aircraft Monitoring (ECAM) Display Unit (DU) can show the VENT AVNCS SYS FAULT message. Ignore this message, but make sure that you do a reset (open and close) of the Avionics Equipment Ventilation Computer (AEVC) circuit breakers at the end of the procedure.

1 Put a WARNING NOTICE(S) in position to tell persons not to operate this pushbutton switch.
(9) Put a WARNING NOTICE(S) to tell persons to remove snow from their shoes and clothes before they go into the aircraft. This is very important in the cargo compartments. If there is ice or snow on the latches, this can cause defective operation of the cargo loading system.
(10) De-energize the ground service network
(Ref. AMM TASK 24-41-00-862-002).
(11) To prevent contamination of the aircraft interior, make sure that all the doors and the sliding windows are closed.
(12) Install the protection equipment (Ref. AMM TASK 10-11-00-555-013).
(13) Install a FILM - POLYETHYLENE or equivalent on each landing gear wheel/brake.

Subtask 12-31-11-941-055-A

C. Preparation of Equipment

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.

(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 so 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/de-icing fluid. Do not mix other fluids with the anti/de-icing fluid. Use the fluid at 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 1.5 psi (0.1034 bar) impact pressure on the radome, belly fairing, rudder and elevators
Not more than 10 psi (0.6895 bar) impact pressure on all other surfaces.

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

4. Procedure
Subtask 12-31-11-660-059-A

A. Aircraft Anti-Icing
(1) Apply the anti-icing fluid to all the external surfaces of the aircraft with the DE- ANTI-ICING EQUIPMENT - 12M (39 FT) SPRAYING HEIGHT.
You must apply the fluid directly from the front to the rear of the aircraft.
(2) Do not apply Type II, III or IV fluid directly on the fuselage area forward of the passenger/crew door.
(3) Do not apply fluid directly on:

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

The APU air intake (13) and exhaust (12)
The engine cowls (8), air intakes (7) and exhausts (10)
The inlets (6) and outlets (15) of the Air Conditioning System (ACS)
The landing gears (brakes, wheels, leg, etc.) (14)
The pitot probes (3)
The static probes (4)
The standby static probes (1)
The Angle of Attack (AOA) sensors (16)
The Total Air Temperature (TAT) sensors (18)
The ice detectors (17) (if installed)
The cabin windows (5)
The cockpit windows (2)
The cabin doors (11)
The radome (19)
The bleed-air precooler-exchanger ventilation-grids (9).

(4) Do not use too much anti-icing fluid on the rudder, the elevator and in the aileron servocontrol areas.

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).

(5) In the Trimmable Horizontal Stabilizer (THS) area, be specially careful to point the spray from the front to the rear.

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

(6) To prevent the flow of fluid on the cockpit windows, remove the remaining fluid from the forward areas. You can clean the surface with clean water and a soft cloth.
(7) If you find fluid on the cockpit windows, clean the windows with clean water and a soft cloth.

Do not use the wipers to remove the fluid from the windshield.
Be careful to remove all the fluid from the windshield, specially in the wiper area.

(8) Inspection of the APU inlet:
(a) Make sure that there is no remaining anti-icing solution on APU inlet.
(b) If necessary, clean the APU inlet.

5. Close-up
Subtask 12-31-11-942-053-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).

Subtask 12-31-11-865-050-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 12-31-11-942-054-A

C. 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 anti-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] 2026.03.31 22:57:24 UTC