DOC AIRBUS | AMM A320FCold Weather Maintenance - Structure
TASK 12-31-51-660-001-A
Cold Weather Maintenance - Structure
1. Reason for the Job
This procedure gives the cold weather maintenance practices for the structure.
2. Job Set-up Information
A. Referenced Information
3. Job Set-up
Subtask 12-31-51-010-050-A
Subtask 12-31-51-660-050-A
[Rev.10 from 2021]
2026.04.01 04:22:21 UTC
Cold Weather Maintenance - Structure
1. Reason for the Job
This procedure gives the cold weather maintenance practices for the structure.
2. Job Set-up Information
A. Referenced Information
| REFERENCE | DESIGNATION |
|---|---|
| TASK 53-00-00-210-001-A | Remove and Detailed Inspection of Piston Type Drain Valves in Lower Fuselage Shell |
| TASK 53-42-14-000-001-A | Removal of the Aft Cargo-Compartment Floor-Panels Zone 150 |
| TASK 53-42-14-400-001-A | Installation of the Aft Cargo-Compartment Floor-Panels Zone 150 |
| TASK 53-42-14-400-001-A-01 | Installation of the Aft Cargo-Compartment Floor-Panels (Alternative Installation Procedure with the Skyflex Option) |
Subtask 12-31-51-010-050-A
A. There is no special job set-up for this task.
4. ProcedureSubtask 12-31-51-660-050-A
A. General
(1) At the start of each winter, make sure that the drain valves in the lower fuselage are clean and operate correctly. (Ref. AMM TASK 53-00-00-210-001)
(2) Ice can collect in the lower fuselage areas especially when the aircraft flies from warm, humid climates to cold climates. In some conditions, the ice can collect during more than one flight.
Subtask 12-31-51-660-051-A (1) At the start of each winter, make sure that the drain valves in the lower fuselage are clean and operate correctly. (Ref. AMM TASK 53-00-00-210-001)
(2) Ice can collect in the lower fuselage areas especially when the aircraft flies from warm, humid climates to cold climates. In some conditions, the ice can collect during more than one flight.
NOTE: Water/ice in the lower fuselage can cause failure of the radio altimeter.
(3) When you do a check for ice in the lower fuselage, look for ice in the aft area before you look in the forward area. Ice usually collects more easily in the aft area than in the forward area. Water evaporation is faster in the forward area because of the warm air from the avionics compartment. B. Check for Ice
(1) Remove a floor panel from the forward end of the aft cargo compartment. (Ref. AMM TASK 53-42-14-000-001)
(2) Look for ice in the lower fuselage.
(3) If you find ice below the aft cargo compartment, look for ice below the forward cargo compartment.
(4) Install the floor panel (Ref. AMM TASK 53-42-14-400-001).
(5) Frequency of check
You must adapt the frequency of the check to the climatic conditions in which the aircraft operates. In the worst condition one check per week should be sufficient initially.
Subtask 12-31-51-660-052-A (1) Remove a floor panel from the forward end of the aft cargo compartment. (Ref. AMM TASK 53-42-14-000-001)
(2) Look for ice in the lower fuselage.
(3) If you find ice below the aft cargo compartment, look for ice below the forward cargo compartment.
(4) Install the floor panel (Ref. AMM TASK 53-42-14-400-001).
(5) Frequency of check
You must adapt the frequency of the check to the climatic conditions in which the aircraft operates. In the worst condition one check per week should be sufficient initially.
C. Removal of Ice
(1) Warm hangar
The recommended procedure is to put the aircraft in a warm hangar with cargo bay doors open. This will cause all the ice in the aircraft to melt and the water will flow out through the drain valves.
You can use a hot air blower if the aircraft is parked in an open area.
(3) Frequency of ice removal
You must adapt the frequency of ice removal to the climatic conditions in which the aircraft operates. In the worst conditions, one overnight stop a week is usually sufficient for ice removal.
(4) The procedure used to remove ice from the lower fuselage must be monitored to make sure that all water drains are working and that the all the ice is removed.
(1) Warm hangar
The recommended procedure is to put the aircraft in a warm hangar with cargo bay doors open. This will cause all the ice in the aircraft to melt and the water will flow out through the drain valves.
CAUTION:
MAKE SURE THAT THE TEMPERATURE OF THE AIR FROM THE HOT AIR BLOWER IS NOT MORE THAN 50 DEG.C (122 DEG.F).
IF THE TEMPERATURE IS MORE THAN 50 DEG.C (122 DEG.F) YOU CAN CAUSE DAMAGE TO THE AIRCRAFT.
(2) Hot air blower You can use a hot air blower if the aircraft is parked in an open area.
(3) Frequency of ice removal
You must adapt the frequency of ice removal to the climatic conditions in which the aircraft operates. In the worst conditions, one overnight stop a week is usually sufficient for ice removal.
(4) The procedure used to remove ice from the lower fuselage must be monitored to make sure that all water drains are working and that the all the ice is removed.