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Pack Flow Control Valve - Component Location
Figure 401/TASK 21-51-00-991-001
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Pack Flow Control Valve - Component Location
Figure 401A/TASK 21-51-00-991-001-A
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Pack Flow Control Valve - Component Location
Figure 401B/TASK 21-51-00-991-001-B
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R (1) FOR 11HB
(a) Push the PACK 1 pushbutton switch to the off position (the OFF legend comes on).
R (2) FOR 8HB
(a) Push the PACK 2 pushbutton switch to the off position (the OFF legend comes on).
(3) Remove and discard the lockwire from the special screw (1).
(4) Remove the special screw (1) from the position (A).
(5) Disconnect the quick release connector (3).
NOTE : This will vent the pack flow-control valve and close the____ butterfly valve.
(6) Make sure that the valve indicator (2) is in the closed position.
(7) Install the special screw (1) in the position (B) and safety with corrosion-resistant steel lockwire 0.8 mm (0.0314 in.) dia.
(8) Connect the quick release connector (3) to the connection (4).
5. Close-up________
Subtask 21-51-00-410-050
A. Close Access
(1) Make sure that the work area is clean and clear of tool(s) and other items.
(2) Install the access panel (Ref. TASK 53-35-13-400-002) :
R (a) FOR 8HB - 192KB,
R (b) FOR 11HB - 191KB.
(3) Remove the warning notice(s).
(4) Record the deactivation of the pack flow-control valve in the aircraft technical log book.
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B. De-energize the aircraft electrical circuits. (Ref. TASK 24-41-00-862-002)
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TASK 21-51-00-440-001 Reactivation of the Pack Flow-Control 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.
NOTE : The procedure is the same for the pack flow-control valve 8HB and 11HB.
____
1. Reason for the Job
__________________
Refer to the MMEL TASK: 21-51-01
Flow Control and Indicating
Pack Flow Control Valve
2. Job Set-up Information
______________________
A. Consumable Materials
-------------------------------------------------------------------------------REFERENCE DESIGNATION -------------------------------------------------------------------------------
No specific corrosion-resistant steel lockwire 0.8 mm
B. Referenced Information
-------------------------------------------------------------------------------REFERENCE DESIGNATION -------------------------------------------------------------------------------
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 the Belly Fairing Structure R TSM ATA 21 (for corrective action)
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