29-11-25
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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
747-400 MAINTENANCE MANUAL
S 434-013
(6) Install caps on the open tubes and the ports to prevent contamination.
TASK 29-11-25-404-014
3. Electrical Component Assembly Installation (Fig. 401)__________________________________________
A. Special Tools and Equipment
(1)
ME60B00158 Air-Driven Hydraulic Pump Muffler
B.
Consumable Materials
(1)
D00071 Oil - Aircraft Turbine Engine Lubricating, MIL-L-7808 (optional to MIL-L-23699)
(2)
D00068 Oil - Aircraft Turbine Engine Lubricating, MIL-L-23699 (optional to MIL-L-7808)
(3)
G00095 Detector - Leak, Leak Tek (160X)
C.
References
(1)
AMM 24-22-00/201, Manual Control
(2)
AMM 36-00-00/201, Pneumatic System
(3)
AMM 54-62-00/201, Nacelle Strut Access Panels
(4)
IPC 29-11-41 Fig. 1
D.
Access
(1)
Location Zone
454 System 1 - Strut Aft Fairing
484 System 4 - Strut Aft Fairing
(2)
Access Panel 454A Trailing Edge Fairing Door, LH - System 1 484A Trailing Edge Fairing Door, LH - System 4
E.
Procedure
(1)
Remove the caps from the tubes and the ports.
S 424-035
(2)
Install the electrical component assembly:
(a)
Lubricate the new packings and the threads of the fittings with engine oil.
(b)
Install the packings and the jam nuts on the elbows.
S 034-015
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747-400 MAINTENANCE MANUAL
(c) Install the elbows in the cylinder and supply ports.
NOTE: Do not tighten the jam nuts until the tubes align
____
with the elbows.
(d)
Put the electrical component assembly in its position on the gearcase.
(e)
Make sure the alignment pin engages the receptacle on the upper bracket.
(f)
Make sure the captive screw engages the gearcase.
(g)
Install the captive washer nut.
1) Tighten the nut.
(h)
Install the two mounting bolts, the washers, and the spacers in the lower bracket of the electrical component assembly.
(i)
Connect the hydraulic hose to the electrical component assembly.
(j)
Connect the supply port tube and the cylinder port tube to the electrical component assembly.
NOTE: You must install the filter in the supply port tube
____
if it fell out during the removal.
(k)
Tighten the jam nuts on the elbows.
(l)
Connect the electrical connector to the electrical component assembly.
S 864-022
(3)
Close this circuit breaker for the applicable system:
(a)
P7 Overhead Circuit Breaker Panel
1) 7J1 HYDRAULICS DEMAND 1
2) 7F1 HYDRAULICS DEMAND 4
S 794-036
(4)
Do the leak test for the installation of the electrical component assembly:
(a)
Supply electrical power (AMM 24-22-00/201).
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747-400 MAINTENANCE MANUAL
(b)
Install the ADP muffler on the turbine exhaust.
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