E.
Procedure
S 012-068
(1)
Open the fairing doors on the trailing edge of the applicable strut (AMM 54-62-00/201).
S 862-044
(2)
Supply electrical power (AMM 24-22-00/201).
S 482-069
(3)
Install the muffler for the air-driven pump on the turbine exhaust.
S 792-070
(4)
Apply the leak detector to the tube fittings.
(5)
Supply pressure to the pneumatic system (AMM 36-00-00/201).
S 862-072
(6)
Put the applicable HYD DEMAND switch on the P5 panel in the ON position.
S 792-073
(7)
Examine the fittings for leakage:
(a)
Repair the cause of all the leakage you find.
S 862-071
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747-400 MAINTENANCE MANUAL
S 862-074
(8)
Put the HYD DEMAND switch in the OFF position.
S 862-075
(9)
Release the pressure in the pneumatic system (AMM 36-00-00/201).
S 082-076
(10)
Remove the muffler for the air-driven pump.
S 412-077
CAUTION: MAKE SURE YOU LATCH THE FAIRING DOORS ON THE TRAILING EDGE
_______ CORRECTLY. DAMAGE CAN OCCUR IF THE DOORS OPEN DURING A FLIGHT.
(11)
Close the fairing doors on the trailing edge of the applicable strut (AMM 54-62-00/201).
S 862-078
(12)
Remove the electrical power if it is not necessary
(AMM 24-22-00/201).
TASK 29-11-15-102-001
12. Clean the Water Separator Bleed Hole (Fig. 202)
____________________________________
A. References
(1)
AMM 36-00-00/201, Pneumatic System
(2)
AMM 54-62-00/201, Nacelle Strut Access Panels
B.
Access
(1)
Location Zone
454 System 1 - Strut Trailing Edge Fairing
484 System 4 - Strut Trailing Edge Fairing
(2)
Access Panel
454A Trailing Edge Fairing Doors - System 1
484A Trailing Edge Fairing Doors - System 4
C.
Procedure
S 012-079
(1)
Open the fairing doors on the trailing edge of the applicable strut (AMM 54-62-00/201).
(2)
Release the pressure in the pneumatic system (AMM 36-00-00/201).
S 862-080
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747-400 MAINTENANCE MANUAL
ENGINE NACELLE STRUT
SEE A
ACTUATOR FOR
THE SPEED
CONTROL VALVE
A
SHUTOFF/SPEED CONTROL VALVE
A
SEE B
FWD
WATER SEPARATOR
FOR THE SPEED
CONTROL VALVE
A
Water Separator Servicing Figure 202 (Sheet 1)
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A
747-400 MAINTENANCE MANUAL
SHUTOFF AND SPEED CONTROL VALVE UNIT
SHUTOFF/SPEED
CONTROL VALVE
TYPICAL WATER SEPARATOR HOUSING
BLEED HOLEA-A
FWD WATER SEPARATOR FOR THE SHUTOFF VALVE
B
Water Separator Servicing Figure 202 (Sheet 2)
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