(ah) Adjust the harness to ensure that it is not too loose or too strained at the P20 connector (1). 1) Tighten the three nuts (7).
(ai) Remove the nut (2) on the exit duct flange and attach the grommet (5) and the clamp (4) onto the bolt (3).
(aj) Put the nut (2) on the bolt (3) and tighten the nut.
S 394-202
(4)
Apply the sealant to the edges of the J2 connector at the cable bracket face.
S 414-204
(5)
Close the APU access doors:
(a)
Do a visual check of the EGT bus bars:
1) Make sure the bus bars are not damaged.
2) Make sure no metal parts touch the bus bars.
3) Make sure the bus bars do not touch each other.
(b)
Disengage the support rods for the APU access doors.
(c)
Put the support rods in the clips on the inner side of the APU access doors.
(d)
Make sure the insulation covers correctly attach to the APU compartment firewall.
(e)
Close the APU access doors.
(f)
Close the latches on the APU access doors.
S 864-205
(6)
Remove the DO-NOT-CLOSE tags and close these circuit breakers:
(a)
P6 Main Power Supply Panel
1) 6K18 APU ALTN CONT
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747-400 MAINTENANCE MANUAL
(b) P83 Panel, E8 Aft Equipment Center
1) APU PRIMARY CONT
S 864-206
(7) Remove the DO-NOT-OPERATE tag from the APU control switch on the P5 panel.
TASK 49-14-00-404-187
9. APU WITHOUT A WIRE HARNESS JUMPER (POST-PWC-SB 16142); APU Rear Wire Harness Installation (Fig. 404)__________________________________
A. Consumable Materials
(1)
A00064 Sealant - RTV 732
(2)
B00130 Solvent - Isopropyl Alcohol
(3)
G01043 Cloth - Lintfree
B.
References
(1)
WDM 49-11-16, 49-11-17, 49-11-18
(2)
SSM 49-11-01
(3)
IPC 49-14-00 Fig. 1
C.
Access
(1)
Location Zone 317 APU Compartment-Forward of Air Inlet Plenum on APU Engine, LH
318 APU Compartment-Forward of Air Inlet Plenum on APU Engine, RH
(2)
Access Panel
317AL APU Access Door
318AR APU Access Door
D.
Procedure
S 094-188
(1) Remove the caps and the plugs from all the electrical connectors and receptacles before you connect each connector.
S 114-189
WARNING: DO NOT GET SOLVENTS IN YOUR MOUTH, OR YOUR EYES, OR ON YOUR
_______ SKIN. DO NOT BREATHE THE FUMES FROM SOLVENTS. SOLVENTS ARE HAZARDOUS MATERIALS. SOLVENTS MAY BE FLAMMABLE OR HARMFUL TO THE ENVIRONMENT. REFER TO PRODUCT MATERIAL SAFETY DATA SHEETS (MSDS) AND LOCAL REQUIREMENTS FOR PROPER HANDLING PROCEDURES.
(2) Clean the area of the harness bracket around the J2 connector with the cloth made moist with solvent, Series 92 (AMM 20-30-92).
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747-400
MAINTENANCE MANUAL
S 424-191
(3) Install the rear wire harness (Fig. 404):
NOTE: The torque value for all the cable clamp bolts is 36-40
____
pound-inches (4.1-4.5 newton-meters).
NOTE: All the electrical connectors must be tightened with
____ your hands first and then tightened to 85-100 pound-inches (9.6-11.3 newton-meters) with a mini-strap wrench.
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