COLD WEATHER MAINTENANCE - LANDING GEAR - MAINTENANCE PRACTICES
_______________________________________________________________ TASK 12-31-32-660-001 Cold Weather Maintenance - Landing Gear WARNING : PUT THE SAFETY DEVICES AND THE WARNING NOTICES IN POSITION BEFORE YOU
_______ START A TASK ON OR NEAR:
 -
THE FLIGHT CONTROLS

 -
THE FLIGHT CONTROL SURFACES

 -
THE LANDING GEAR AND THE RELATED DOORS

 -COMPONENTS THAT MOVE. WARNING : MAKE SURE THAT THE GROUND SAFETY-LOCKS ARE IN POSITION ON THE LANDING
_______ GEAR.
 1. Reason for the Job
__________________
 This procedure gives the cold weather maintenance practices for the landing gear.
 2. Job Set-up Information
______________________
 A. Fixtures, Tools, Test and Support Equipment
 -------------------------------------------------------------------------------REFERENCE QTY DESIGNATION -------------------------------------------------------------------------------
No specific safety barriers
 B. Referenced Information
 -------------------------------------------------------------------------------REFERENCE DESIGNATION -------------------------------------------------------------------------------
12-14-32-614-001 Nitrogen Filling of the Tires
 3. Job Set-up
__________ Subtask 12-31-32-941-050
 A. Safety Precautions
 (1) Put the safety barriers in position.

 4. Procedure
_________

 Subtask 12-31-32-660-050
 A. General
 (1) When the ambient temperature decreases, the pressure in the tires also decreases. A 3 deg.C (5.4 deg.F) change in temperature causes a 1% change in tire pressure.
 NOTE : The tires wear faster if the pressure in the tires is low.
____ Subtask 12-31-32-660-051
 B. Recommendations
 (1) Check the tire pressure If the aircraft is parked in cold weather conditions (cold soak) for more than one hour, do a check of the tire pressure. If necessary, correct the pressure with nitrogen (Ref. TASK 12-14-32-614-001).
 NOTE : Do not use air to correct the tire pressure. If the ambient
____ temperature is below 0 deg.C (32.00 deg.F), moisture in the air can change to ice in the valve and cause a permanent leak.
 (2) Towing Be careful during aircraft towing operations in cold weather conditions. Do not make small-radius turns which can cause too much load on the sidewalls of the tires.
 5. Close-up
________ Subtask 12-31-32-942-050
 A. Removal of Equipment
 (1)
 Remove the safety barriers

 (2)
 Remove the ground support and maintenance equipment, the special and standard tools and all other items.

 COLD WEATHER MAINTENANCE - OXYGEN - MAINTENANCE PRACTICES
_________________________________________________________
 TASK 12-31-35-660-001
 Cold Weather Maintenance - Oxygen System
 1. Reason for the Job
__________________
 This procedure gives the cold weather maintenance practises for the oxygen
 system.
 2. Job Set-up Information
______________________
 A. Consumable Materials
 -------------------------------------------------------------------------------

REFERENCE  DESIGNATION
 -------------------------------------------------------------------------------
Material No. 05-004  USA MIL-L-25567 TYPE I
 OXYGEN LEAK DETECTOR (Ref. 20-31-00)

 B. Referenced Information
 -------------------------------------------------------------------------------
REFERENCE  DESIGNATION
 -------------------------------------------------------------------------------
R  12-14-35-600-001 Servicing of the Oxygen-Replenishing 12-33-21-618-001 Pre-conditioning through the LP Ground Connection 35-11-41-000-001 Removal of the Crew Oxygen-Storage Cylinder (5750HM) 35-11-41-400-001 Installation of the Crew Oxygen-Storage Cylinder
 (5750HM)
 3. Job Set-up
__________
 Subtask 12-31-35-941-050

 A. Not Applicable

 4. Procedure
_________

 Subtask 12-31-35-660-050
 A. Installation of Oxygen Cylinder(s). (Ref. TASK 35-11-41-000-001) (Ref. TASK 35-11-41-400-001)
 NOTE : When you replace oxygen cylinder(s), you must mandatorily obey the____ Removal/Installation procedure for oxygen cylinder(s).
 (1) If you replace the oxygen cylinder(s) of the crew oxygen system when the ambient temperature is -20 deg.C (-4.00 deg.F) or less : - make sure that the temperature in the oxygen cylinder compartment is more than -20 deg.C (-4.00 deg.F). If this temperature is -20 deg.C (-4.00 deg.F) or less, the SPECIAL MATERIALS (Material No. 05-004) used to do the leak test will freeze.
　
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