(b)
Through the HP ground connector (Ref. TASK 12-33-21-618-001) or
(c)
With the APU (Ref. TASK 12-33-21-618-001) and (Ref. TASK 12-31-49-660-001).
5. Close-up
________
1EFF : ALL 1 12-31-21Page 203 1 1 May 01/99R 1 1 1CES 1
COLD WEATHER MAINTENANCE - ELECTRICAL POWER - MAINTENANCE PRACTICES
___________________________________________________________________
TASK 12-31-24-660-001
Cold Weather Maintenance - Electrical Power
1. Reason for the Job
__________________
This procedures gives the cold weather maintenance practices for the batteries when the aircraft is in a cold soak configuration.
2. Job Set-up Information
______________________
A. Referenced Information
-------------------------------------------------------------------------------REFERENCE DESIGNATION -------------------------------------------------------------------------------
R 12-31-24-991-001 Fig. 201
3. Job Set-up
__________
Subtask 12-31-24-941-050
A. Not Applicable
4. Procedure
_________
Subtask 12-31-24-660-050
A. General. In very low temperatures, the chemical reaction of the electrolyte is slower and the performance of the batteries decreases :
-
the quantity of high current the batteries can supply decreases,
-
the time necessary to charge the batteries increases. This procedure gives you instructions that keep the batteries serviceable.
NOTE : The values specified in this procedure are only applicable if the
____ aircraft doors stay closed during the cold soak.
Subtask 12-31-24-660-051
B. Battery Cold Weather Maintenance Practices.
R (1) The batteries can stay on the aircraft during the cold soak if : - the OAT stays higher than -15 deg.C (+5.00 deg.F),
R R R R (2) Refer to the graph to know the battery cool-down time. You must remove the batteries before their internal temperature reaches -15 DEG.C (+5.00 DEG.F). (Ref. Fig. 201/TASK 12-31-24-991-001)
NOTE : We recommend that you use a ground power unit to start the APU____ if the OAT was lower than -15 deg.C (+5.00 deg.F) during the cold soak.
R R Batteries Cooling Down Curve Figure 201/TASK 12-31-24-991-001
1EFF : 1 1 1CES ALL 1 111 12-31-24 Page 203 Feb 01/05
COLD WEATHER MAINTENANCE - EQUIPMENT/FURNISHINGS - MAINTENANCE PRACTICES
________________________________________________________________________
TASK 12-31-25-660-001
Cold Weather Maintenance - Equipment/Furnishings
1. Reason for the Job
__________________
Self Explanatory
2. Job Set-up Information
______________________
A. Fixtures, Tools, Test and Support Equipment
-------------------------------------------------------------------------------REFERENCE QTY DESIGNATION -------------------------------------------------------------------------------
No specific warning notice
B. Consumable Materials
-------------------------------------------------------------------------------REFERENCE DESIGNATION -------------------------------------------------------------------------------
Material No. 05-027B X (Ref. 20-31-00)
C. Referenced Information
-------------------------------------------------------------------------------REFERENCE DESIGNATION -------------------------------------------------------------------------------
12-31-38-660-001 Cold Weather Maintenance - Water/Waste 12-33-21-618-001 Pre-conditioning through the LP Ground Connection 25-52-22-000-001 Removal of the Ball Mats and Ball Strips 25-52-22-400-001 Installation of the Ball Mats and Ball Strips 52-10-00-010-001 Opening of the Passenger/Crew Door 52-10-00-410-001 Closing of the Passenger/Crew Door 52-30-00-860-001 Open the FWD or AFT Cargo-Compartment Door with the
Yellow Electric Pump 52-30-00-860-002 Close the FWD or AFT Cargo-Compartment Door with the
Yellow Electric Pump
3. Job Set-up
__________
Subtask 12-31-25-010-050
A. Get Access
(1) Open the Cargo Compartment Doors (Ref. TASK 52-30-00-860-001).
(2) Get Access to the Cabin (Ref. TASK 52-10-00-010-001).
4. Procedure_________
Subtask 12-31-25-660-050
A. Do the Cold Weather Maintenance
(1) Cargo Compartments - Door Sill Latches
(a) Remove the ball strips adjacent to the door sill latches (Ref. TASK 25-52-22-000-001).
(b) Do an inspection of the component interface and/or the adjacent area.
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