DOC AIRBUS | AMM A320FCold Weather Maintenance - Power Plant
TASK 12-31-71-660-803-A
Cold Weather Maintenance - Power Plant
This procedure gives the cold weather maintenance practices for the engines.
2. Job Set-up Information
A. Fixtures, Tools, Test and Support Equipment
B. Consumable Materials
C. Referenced Information
3. Job Set-up
Subtask 12-31-71-941-052-A
Subtask 12-31-71-660-055-A
[Rev.10 from 2021]
2026.04.01 12:57:39 UTC
Cold Weather Maintenance - Power Plant
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:
INSTALL ENGINE INLET AND EXHAUST PLUG COVERS WHEN AIRCRAFT IS STORED UNDER HEAVY SNOWSTORM CONDITIONS SINCE CONSEQUENTIAL ENGINE INTERNAL DAMAGES MAY OCCUR.
CAUTION:
DO NOT SPRAY DEICING FLUID INTO THE ENGINE INLET WITH ENGINES OPERATING. THIS IS TO PREVENT THE POSSIBILITY OF THE PASSAGE OF NOXIOUS FUMES INTO THE AIRPLANE.
1. Reason for the JobThis procedure gives the cold weather maintenance practices for the engines.
2. Job Set-up Information
A. Fixtures, Tools, Test and Support Equipment
| REFERENCE | QTY | DESIGNATION |
|---|---|---|
| No specific | 1 | GUN - HOT AIR |
| No specific | 1 | HOT AIR BLOWER |
| No specific | 1 | HOT AIR BLOWER MAX OPERATING 55DEG C (131 DEG F) |
| REFERENCE | DESIGNATION |
|---|---|
| (Material No.CP2499) | Kilfrost ABC3 |
| (Material No.14SBA1) | Textile-Lint free Cotton - |
| REFERENCE | DESIGNATION |
|---|---|
| TASK 71-00-00-790-805-A | Fuel or Hydraulic or Oil Leakage Limits |
| TASK 71-00-00-860-831-A | Start the Engine in Cold Weather Conditions (Outside Air Temperature (OAT) less than -20 deg.F (-29 deg.C)) |
Subtask 12-31-71-941-052-A
A. Not applicable
4. ProcedureSubtask 12-31-71-660-055-A
A. When the Outside Air Temperature (OAT) is less than -20 deg.F (-29 deg.C), do the procedure to start the engine in cold weather conditions (Ref. AMM TASK 71-00-00-860-831).
Ice can collect in the engine intakes and can cause the fan to freeze. Thus, you must examine the engine intake and the fan carefully before you start the engine.
Make sure that there is no ice on the forward and rear sides of the fan blades.
Use a HOT AIR BLOWER to remove all signs of ice and water before you start the engine.
Subtask 12-31-71-660-056-A Ice can collect in the engine intakes and can cause the fan to freeze. Thus, you must examine the engine intake and the fan carefully before you start the engine.
Make sure that there is no ice on the forward and rear sides of the fan blades.
Use a HOT AIR BLOWER to remove all signs of ice and water before you start the engine.
B. Freezing Points
(1) The oil temperature is also a limitation. For the approved oils and the oil limitation temperatures, you must refer to the engine manufacturer's data.
Subtask 12-31-71-660-057-A (1) The oil temperature is also a limitation. For the approved oils and the oil limitation temperatures, you must refer to the engine manufacturer's data.
C. Preparation for Engine Start
(2) De-icing of the intake cowls and the fan exhaust duct.
(a) If ice collected, blow hot air on the intake cowls and the fan exhaust duct at a maximum air temperature of 158 deg.F (70.00 deg.C) until you fully remove the ice. Use a hot air duct from a HOT AIR BLOWER (maximum operating temperature: 158 deg.F (70.00 deg.C)).
(3) Do a visual check for ice collected on the cowling and the thrust reverser external-surfaces.
(4) De-icing of the cowling and the thrust reverser external-surfaces.
(a) If there is ice on the cowling and the thrust reverser external-surfaces, blow hot air at a maximum air temperature of 158 deg.F (70.00 deg.C) until you fully remove the ice. Use a hot air duct from a HOT AIR BLOWER (maximum operating temperature: 158 deg.F (70.00 deg.C)).
(5) De-icing of the drain mast area.
(a) Apply heat to the drain mast area with a HOT AIR BLOWER or GUN - HOT AIR (maximum operating temperature: 158 deg.F (70.00 deg.C)).
(6) If it is necessary, de-ice or anti-ice the fan blades with Kilfrost ABC3 (Material No.CP2499) and HOT AIR BLOWER MAX OPERATING 55DEG C (131 DEG F).
(a) Prepare the deicing/anti-icing fluid with the table given that follows:
CONCENTRATION OF HEATED WATER/DEICER FLUID (VOL %)
(7) Look at the general condition of the fan spinner and fan blades, core exhaust nozzle, Low Pressure Turbine (LPT) and external surfaces of the cowls.
(8) Do a check of the drain ports for fuel, oil and hydraulic leaks (Ref. AMM TASK 71-00-00-790-805). Also make sure that fuel drained from the engine does not cause a fire.
WARNING:
DEICING/ANTI-ICING FLUID IS DANGEROUS. USE RUBBER GLOVES AND EYE PROTECTION. KEEP THE FLUID AWAY FROM HEAT AND AN OPEN FLAME. PROVIDE ADEQUATE VENTILATION.
CAUTION:
USE ONLY GLYCOL ALCOHOL AS A DEICING/ANTI-ICING MIXTURE. METHANOL CAN CAUSE CORROSION TO ENGINE PARTS MADE OF TITANIUM.
(1) Do a visual check of the intake cowls and the fan exhaust duct for collected ice.(2) De-icing of the intake cowls and the fan exhaust duct.
(a) If ice collected, blow hot air on the intake cowls and the fan exhaust duct at a maximum air temperature of 158 deg.F (70.00 deg.C) until you fully remove the ice. Use a hot air duct from a HOT AIR BLOWER (maximum operating temperature: 158 deg.F (70.00 deg.C)).
(3) Do a visual check for ice collected on the cowling and the thrust reverser external-surfaces.
(4) De-icing of the cowling and the thrust reverser external-surfaces.
(a) If there is ice on the cowling and the thrust reverser external-surfaces, blow hot air at a maximum air temperature of 158 deg.F (70.00 deg.C) until you fully remove the ice. Use a hot air duct from a HOT AIR BLOWER (maximum operating temperature: 158 deg.F (70.00 deg.C)).
(5) De-icing of the drain mast area.
(a) Apply heat to the drain mast area with a HOT AIR BLOWER or GUN - HOT AIR (maximum operating temperature: 158 deg.F (70.00 deg.C)).
(6) If it is necessary, de-ice or anti-ice the fan blades with Kilfrost ABC3 (Material No.CP2499) and HOT AIR BLOWER MAX OPERATING 55DEG C (131 DEG F).
(a) Prepare the deicing/anti-icing fluid with the table given that follows:
CONCENTRATION OF HEATED WATER/DEICER FLUID (VOL %)
| ------------------------------------------------------------------------------ |
| ! OAT deg F (deg C) ! DEICING ! ANTI-ICING ! |
| ------------------------------------------------------------------------------ |
| ! ! WATER HEATED TO 140 DEG F ! ! |
| ! 27 (-3) and above ! (60 DEG C) MINIMUM OR HEATED ! 50/50 WATER/DEICER ! |
| ! ! MIX OF DEICER WITH WATER ! ! |
| !----------------------!--------------------------------!--------------------! |
| ! ! ! ! |
| ! 19 to 26 (-4 to -7) ! 50/50 HEATED WATER/DEICER ! 50/50 WATER/DEICER ! |
| ! ! ! ! |
| !----------------------!--------------------------------!--------------------! |
| ! ! ! ! |
| ! 7 to 18 (-8 to -14) ! 50/50 HEATED WATER/DEICER ! 25/75 WATER/DEICER ! |
| ! ! ! ! |
| !----------------------!--------------------------------!--------------------! |
| ! ! ! ! |
| ! 1 to 6 (-15 to -17) ! 50/50 HEATED WATER/DEICER ! 100% DEICER ! |
| ! ! ! ! |
| !----------------------!--------------------------------!--------------------! |
| ! ! ! ! |
| ! -13 to 0 (-18 to -25)! 25/75 HEATED WATER/DEICER ! 100% DEICER ! |
| ! ! ! ! |
| !----------------------!-----------------------------------------------------! |
| ! ! SAE TYPE II FLUIDS CAN BE USED AS ! |
| ! ! DEICING/ANTI-ICING AGENTS, IF A 13 DEG F (7 DEG C) ! |
| ! ! BUFFER IS MAINTAINED BETWEEN THE FREEZING POINT OF ! |
| ! -14 (-26) and below ! THE CONCENTRATED FLUID AND OAT. ! |
| ! ! IN ALL CONDITIONS THIS TEMPERATURE MUST NOT BE ! |
| ! ! LOWER THAN THE LOWEST OPERATIONAL TEMPERATURE AS ! |
| ! ! DEFINED BY THE AERODYNAMIC ACCEPTANCE TEST OF THE ! |
| ! ! MANUFACTURER. ! |
| ------------------------------------------------------------------------------ |
NOTE: Hot water at a temperature of more than 140 deg.F (60.00 deg.C) will give more satisfactory results. You must not apply a temperature of more than 199.40 deg.F (93.00 deg.C).
NOTE: The maximum operating temperature of the hot air blower must be 131 deg.F (55.00 deg.C).
(b) Apply the deicing/anti-icing mixture on the frozen fan blades with a clean Textile-Lint free Cotton - (Material No.14SBA1) . (7) Look at the general condition of the fan spinner and fan blades, core exhaust nozzle, Low Pressure Turbine (LPT) and external surfaces of the cowls.
(8) Do a check of the drain ports for fuel, oil and hydraulic leaks (Ref. AMM TASK 71-00-00-790-805). Also make sure that fuel drained from the engine does not cause a fire.
NOTE: In very bad cold weather condition (OAT of less than -4 deg.F (-20.00 deg.C)), fuel leaks from the drain can occur and is not unusual. Therefore, you must do the check for fuel leaks at the drain mast when the engine is fully stable at idle.