747-400
MAINTENANCE MANUAL
FLOW REGULATING VALVE AFT CARGO AIR CONDITIONING ASEE
BONDING JUMPER ELECTRICAL CONNECTOR
CLAMP (2 LOCATIONS)
AFT CARGO AIR CONDITIONING FWD FLOW REGULATING VALVE
A
Aft Cargo Air Conditioning Flow Regulating Valve Installation
Figure 402
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747-400 MAINTENANCE MANUAL
(b) Right Power Distribution Center, P415 1) 415L27, LWR AFT CGO FRV FSO
WARNING: YOU MUST CAREFULLY INSTALL THE GROUND LOCKS IN ALL LANDING
_______ GEAR. AN ACCIDENTAL RETRACTION OF THE LANDING GEAR CAN CAUSE INJURY TO PERSONS AND DAMAGE TO EQUIPMENT.
(c) Install the ground locks in all the landing gear (AMM 09-11-00/201).
WARNING: YOU MUST CAREFULLY DO THE STEPS IN THE TASK BELOW TO
_______ INSTALL THE DOOR LOCKS ON THE LANDING GEAR DOORS. THE DOORS CAN CLOSE QUICKLY IF YOU DO NOT INSTALL THE DOOR LOCKS CORRECTLY. THIS CAN CAUSE INJURY TO PERSONS OR DAMAGE TO EQUIPMENT.
(d)
Do this task: "Installation of the Door Locks on the Wing Landing Gear" (AMM 32-00-30/201).
(e)
Do this task: "Installation of the Door Locks on the Body Landing Gear" (AMM 32-00-30/201).
S 034-042
(2) Get access to the valve in the right wing gear wheel well.
D. Remove the Valve
S 034-021
(1)
Remove the electrical connector, DV543, from the valve.
S 034-022
(2)
Remove the nut and the washer that attaches the bonding jumper to the valve.
S 034-023
(3)
Remove the bonding jumper from the valve.
S 034-024
(4)
Remove the two clamps from both ends of the valve.
(5)
Remove the two seals from both ends of the valve.
(6)
Remove the valve.
(7)
Put covers on the duct openings.
S 034-025
S 024-026
S 434-027
TASK 21-28-10-404-028
5. Aft Cargo Air Conditioning Flow Regulating Valve Installation
_____________________________________________________________
A. References
(1) AMM 06-09-03/201, Body Section 44 Access Doors and Panels
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747-400
MAINTENANCE MANUAL
(2)
AMM 09-11-00/201, Towing
(3)
AMM 24-22-00/201, Manual Control
(4)
AMM 32-00-30/201, Landing Gear Door Locks
(5)
SSM 21-28-08
(6)
WDM 21-28-51
B. Access
(1) Location Zone
136 Wing Landing Gear Well, RH
C. Install the Valve
S 034-029
(1) Remove the covers from the duct openings.
(a) Make sure there is no unwanted material in the ducts.
S 984-030
(2) Put the valve in its position between the ducts.
(a) Make sure the flow arrow points aft.
S 434-031
(3)
Install the two seals on both ends of the valve.
S 434-032
(4)
Install the two clamps on both ends of the valve.
(a) Tighten the clamps to 45-55 inch-pounds.
S 434-033
(5) Install the bonding jumper on the valve with the nut and the washer.
(a) Make sure the bonding resistance between the valve and the airplane structure is a maximum of 0.0005 ohms.
S 434-034
(6)
Install the electrical connector, DV543, on the valve.
S 864-050
(7)
Remove the DO-NOT-CLOSE identifiers and close these circuit
breakers:
(a)
Main Power Distribution Panel, P6
1) 6E36, FWD LWR A/C CONT CARGO
