**ON A/C ALL
Subtask 21-52-00-860-057
B. Aircraft Maintenance Configuration
(1) Do the EIS stop procedure (Ref. TASK 31-60-00-860-002). Subtask 21-52-00-862-062
C. De-energize the aircraft electrical circuits
(Ref. TASK 24-41-00-862-002).
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TASK 21-52-00-200-013 Detailed Inspection of the Pack Downstream Check-Valve Flappers
1.
Reason for the Job
__________________
Referenced from AMM
2.
Job Set-up Information
______________________
A. Referenced Information
-------------------------------------------------------------------------------REFERENCE DESIGNATION -------------------------------------------------------------------------------
21-52-43-000-001 Removal of the Pack Downstream Check-Valves 15HM and 16HM 21-52-43-400-001 Installation of the Pack Downstream Check-Valves 15HM and 16HM
3. Job Set-up
__________ Subtask 21-52-00-010-072
A. Remove the pack downstream check-valves as necessary (Ref. TASK 21-52-43-000-001).
4. Procedure
_________ Subtask 21-52-00-210-061
A. Detailed Inspection of the Pack Downstream Check-Valve Flappers for
Condition and Operation.
(1)
Make sure that the check valve is clean.
(2)
Do a detailed visual inspection for signs of cracks, dents, marks or corrosion of:
-
the valve flap and its seat,
-
the hinge pin and,
-
the spring of the valve flap.
(3)
Move the valve flap with your hand to make sure that it operates smoothly on its hinge pin.
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(4)
Make sure that:
-the valve flap touches its seat correctly and,
-there are no gaps between the valve flap and the seat.
(5)
If necessary replace the pack downstream check-valve.
5. Close-up
________ Subtask 21-52-00-410-070
A. Install the pack downstream check-valves as necessary (Ref. TASK 21-52-43-400-001).
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AIR COOLING SYSTEM - CLEANING/PAINTING
______________________________________
TASK 21-52-00-100-001
Cleaning of the Air Conditioning Pack-Primary Heat Exchanger 10HM6 (11HM6) and the Main Heat Exchanger 10HM7 (11HM7)
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 MPD TASK: 215200-01
2. Job Set-up Information
______________________
A. Fixtures, Tools, Test and Support Equipment
-------------------------------------------------------------------------------
REFERENCE QTY DESIGNATION
-------------------------------------------------------------------------------
No specific circuit breaker(s) safety clip(s)
B. Referenced Information
-------------------------------------------------------------------------------
REFERENCE DESIGNATION
-------------------------------------------------------------------------------
21-52-25-000-001 Removal of the Primary Heat Exchanger 10HM6 (11HM6) 21-52-25-400-001 Installation of the Primary Heat Exchanger 10HM6
(11HM6) 21-52-26-000-001 Removal of the Main Heat Exchanger 10HM7 (11HM7) 21-52-26-400-001 Installation of the Main Heat Exchanger 10HM7 (11HM7) 24-41-00-861-002 Energize the Aircraft Electrical Circuits from the
External Power 24-41-00-862-002 De-energize the Aircraft Electrical Circuits Supplied from the External Power 53-35-13-000-002 Removal of the Quick-Release Access Panels from the Belly Fairing Structure 53-35-13-400-002 Installation of the Quick-Release Access Panels on
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