LOCKWIRE INSTALLATION
Aluminum Backshell Assembly and Lockwire
Figure 502
C18894
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////////////////////////A / PW4000 SERIES /747-400 / ENGINES /MAINTENANCE MANUAL ////////////////////////
BACKSHELL
HOSE
COUPLING NUT
CLAMP
RED RUBBER TAPE
CONNECTOR
Stainless Steel Backshell Assembly
Figure 503
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C18900
(d) Push the connector into the receptacle while you move the connector from one side to the other side.
CAUTION: DO NOT USE A METAL TOOL TO TIGHTEN OR TORQUE THE ALUMINUM
_______ CONNECTORS. THIS MAY DAMAGE THE CONNECTORS.
(e)
Continue to tighten the coupling nut by hand until it is tight.
(f)
For connectors that have a self-locking coupling nut, make sure the visual indicator band does not show (Fig. 503).
NOTE: The visual indicator band on the receptacle is not a
____ stop line. The leading edge of the connector knurled nut must go over the top of the indicator band. If you see the band, the connector is not installed correctly. If access to the receptacle is not easy, use a TG-70 or BT-BS-611 strap wrench, or equivalent (Fig. 501).
(g) For connectors that do not have a self-locking coupling nut, do as follows: 1) Tighten the connector coupling nut to the receptacle until
the metal of the coupling nut touches the metal of the connector.
NOTE: Use a TG-70 or BT-BS-611 strap wrench, or
____ equivalent (Fig. 501). The rubber strap on the strap wrench will not hold the backshell if you apply too much force.
2) For the connectors with the aluminum backshells, lockwire the backshell, the strain-relief clamp assembly, and the screws, as necessary (Fig. 502).
NOTE: Lockwire is not required for the stainless steel
____ backshells and connector coupling nuts that are self-locking.
3) Lockwire all the connector coupling nuts that are not self-locking.
TASK 71-50-00-845-034-N00
3. Put the Airplane to the Usual Configuration
___________________________________________
A. References
(1)
AMM 71-11-04/201, Fan Cowl Panel
(2)
AMM 71-11-06/201, Core Cowl Panel
(3)
AMM 78-31-00/201, Thrust Reverser System
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////////////////////////A / PW4000 SERIES /747-400 / ENGINES/MAINTENANCE MANUAL ////////////////////////
B. Access
(1)
Location Zones
412 Engine 1
422 Engine 2
432 Engine 3
442 Engine 4
(2)
Access Panels
416 and 417 Thrust Reverser Halves - Engine 1
426 and 427 Thrust Reverser Halves - Engine 2
436 and 437 Thrust Reverser Halves - Engine 3
446 and 447 Thrust Reverser Halves - Engine 4
C.
Procedure
S 415-035-N00
WARNING: DO THE PROCEDURE IN 78-31-00/201 TO CLOSE THE THRUST REVERSERS.
_______ IF YOU DO NOT USE THIS PROCEDURE, YOU CAN CAUSE INJURY TO PERSONS OR DAMAGE TO EQUIPMENT.
(1)
Close the thrust reversers (AMM 78-31-00/201).
S 415-036-N00
(2)
Close the core cowl panels (AMM 71-11-06/201).
S 445-037-N00
(3)
Do this procedure: Thrust Reverser Activation (AMM 78-31-00/201).
(4)
Close the fan cowl panels (AMM 71-11-04/201).
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