D.
References
(1)
AMM 24-22-00/201, Electrical Power - Control
(2)
AMM 71-11-04/201, Fan Cowl Panels
(3)
AMM 71-11-06/201, Core Cowl Panels
(4)
AMM 71-50-00/501, Engine Wire Harness
(5)
AMM 78-31-00/201, Thrust Reverser System
(6)
Standard Wiring Practices Manual D6-54446
E.
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
F.
Prepare to Do the Cable Replacement
S 018-124-N00
(1) Open the fan cowl panels (AMM 71-11-04/201).
S 048-125-N00
WARNING: DO THE THRUST REVERSER DEACTIVATION PROCEDURE TO PREVENT THE
_______ OPERATION OF THE THRUST REVERSER. THE ACCIDENTAL OPERATION OF THE THRUST REVERSER CAN CAUSE INJURIES TO PERSONS OR DAMAGE TO EQUIPMENT.
(2)
Do this procedure: Thrust Reverser Deactivation for Ground Maintenance (AMM 78-31-00/201).
(3)
Open the core cowl panels (AMM 71-11-06/201).
S 018-126-N00
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////////////////////////A / PW4000 SERIES /747-400 / ENGINES/MAINTENANCE MANUAL ////////////////////////
S 018-127-N00
WARNING: OBEY THE INSTRUCTIONS IN THE PROCEDURE TO OPEN THE THRUST
_______
REVERSERS. IF YOU DO NOT OBEY THE INSTRUCTIONS, INJURIES TO
PERSONS OR DAMAGE TO EQUIPMENT CAN OCCUR.
(4)
Open the thrust reversers (AMM 78-31-00/201).
S 868-128-N00
(5)
Remove electrical power (AMM 24-22-00/201).
S 868-129-N00
(6)
Make sure the engine was not operated for a minimum of 5 minutes.
S 358-130-N00
(7)
Identify the replacement cable that is necessary for the circuit
that you will replace.
(a) Use a cable with the same wire gage, specifications, and insulation color as the damaged engine cable.
NOTE: If the same type cable is not available, use the
____ alternate cables given in Table 1. You must splice thermocouple circuits with chromel and alumel wire and splices as applicable.
G. Do the Cable Replacement.
S 358-154-N00
WARNING: DO NOT USE HEAT GUNS, SOLDERING GUNS, AND SOLDERING IRONS FOR
_______
THE ON-WING REPAIRS. THEY ARE NOT RESISTANT TO EXPLOSION AND
CAN CAUSE INJURY TO PERSONS OR DAMAGE TO EQUIPMENT.
(1) Do these steps to install a new cable on the external side of the
harness:
(a)
Find the two connectors which are attached to the ends of the broken cable.
(b)
Put the end of the new cable so it extends 6 inches (150 mm) longer than the broken cable at the connector.
(c)
Use the tape to attach the new cable to the external side of the connector.
(d)
Put the new cable along the wire harness.
(e)
Cut the other end of the cable 6 inches (150 mm) longer than the broken cable at the second connector.
(f)
Use the tape to attach the new cable to the external side of the connector.
(g)
Put a label on each end of the new cable.
1) Write on each label the connector contact numbers of the wires in the cable that you will replace.
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(h) Install the new cable in all of the clamps that hold the wire harness to the engine.
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