(a)
Make sure that:
-
the APU BLEED pushbutton switch is in the off position (the ON legend is off) and,
-
the ENG 1 BLEED and the ENG 2 BLEED pushbutton switches are in the off position (the OFF legends are on).
(b)
Put a warning notice in position to tell persons not to operate these switches.
(2)
On the HP ground connector put a warning notice in position to tell persons not to supply the ground air.
R **ON A/C 001-049, 051-099, 101-149, 151-199, 201-299, 401-499,
Subtask 21-43-00-010-052
D. Get Access
(1)
Put the access platform in position at the access panel 197BB.
(2)
Remove the access panel 197BB (Ref. TASK 53-35-13-000-002).
R **ON A/C 301-399,
R Subtask 21-43-00-010-052-A
R D. Get Access
R (1) Put the access platform in position at the access panel 197KB.
R (2) Remove the access panel 197KB (Ref. TASK 53-35-13-000-002).
R **ON A/C ALL
4. Procedure_________
(Ref. Fig. 401/TASK 21-43-00-991-002)
Subtask 21-43-00-040-051
A. Deactivation of the AFT Cargo Compartment-Heating Trim Air Valve
WARNING : DO NOT TOUCH THE COMPONENT UNTIL IT IS SUFFICIENTLY_______ COOL TO PREVENT BURNS.
(1) Turn the manual overide lever (2) to close the trim air valve.
(2) Disconnect the electrical connector (1) and temporarily attach it to the aircraft structure.
(3) Put blanking caps on the disconnected electrical connectors.
(4) Insert the quick-release pin (4) in the hole (3) in the manual overide lever (1) to safety the trim air valve in the closed position.
NOTE : When not in use the quick-release pin is stored in the hole in____ the body of the trim air valve.
(5) Put a warning notice in the cockpit to tell the flight crew that the trim air valve is deactivated.
(6) Record the deactivation of the trim air valve in the aircraft technical log book.
R R AFT Cargo Compartment-Heating Trim-Air Valve Figure 401/TASK 21-43-00-991-002
1EFF : 1 1 1CES ALL 1 111 21-43-00 Page 404 May 01/98
5. Close-up
________
Subtask 21-43-00-865-075
A. Remove the safety clip(s) and the tag(s) and close this(these) circuit breaker(s): 31HN.
R **ON A/C 001-049, 051-099, 101-149, 151-199, 201-299, 401-499,
Subtask 21-43-00-410-052
B. Close Access
(1)
Make sure that the work area is clean and clear of tool(s) and other items.
(2)
Install the access panel 197BB (Ref. TASK 53-35-13-400-002).
(3)
Remove the access platform(s).
(4)
Remove the warning notice(s). NOTE : Do NOT remove the warning notice in the cockpit which tells
____ the flight crew that the trim air valve is deactivated.
**ON A/C 301-399,
Subtask 21-43-00-410-052-A
B. Close Access
(1)
Make sure that the work area is clean and clear of tool(s) and other items.
(2)
Install the access panel 197KB (Ref. TASK 53-35-13-400-002).
(3)
Remove the access platform(s).
(4)
Remove the warning notice(s). NOTE : Do NOT remove the warning notice in the cockpit which tells
____ the flight crew that the trim air valve is deactivated.
R **ON A/C ALL Subtask 21-43-00-862-052
C. De-energize the aircraft electrical cicuits (Ref. TASK 24-41-00-862-002).
TASK 21-43-00-440-002 Reactivation of the AFT Cargo Compartment-Heating Trim-Air Valve WARNING : MAKE SURE THAT AIR IS NOT SUPPLIED TO THE AIR CONDITIONING SYSTEM
_______
FROM THE MAIN ENGINE, THE APU OR A GROUND SOURCE.
HOT COMPRESSED AIR CAN CAUSE INJURY TO PERSONNEL.
1. Reason for the Job
__________________
Refer to the MMEL TASK: 21-43-02 b)
Cargo Compartment Heating
Aft Cargo Compartment Heating
2. Job Set-up Information
______________________
A. Fixtures, Tools, Test and Support Equipment
-------------------------------------------------------------------------------REFERENCE QTY DESIGNATION -------------------------------------------------------------------------------
No specific circuit breaker(s) safety clip(s)
No specific access platform 2 m (6 ft. 7 in.)
B. Referenced Information
-------------------------------------------------------------------------------REFERENCE DESIGNATION -------------------------------------------------------------------------------
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