(2)
Wire - Jumper
B.
References
(1)
AMM 71-11-04/201, Fan Cowl Panels
(2)
WDM 77-12-11, 77-12-12, 77-12-13, 77-12-14, 77-12-21, 77-12-22
(3)
WDM 77-12-23, 77-12-24, 77-31-11, 77-31-12
(4)
SSM 77-31-01
C.
Access
(1)
Location Zones
117 Electrical & Electronic Compartment, LH
118 Electrical & Electronic Compartment, RH
412 Engine 1 - Fan Case
422 Engine 2 - Fan Case
432 Engine 3 - Fan Case
442 Engine 4 - Fan Case
(2)
Access Panels
414 Right Fan Cowl Panel - Engine 1
424 Right Fan Cowl Panel - Engine 2
434 Right Fan Cowl Panel - Engine 3
444 Right Fan Cowl Panel - Engine 4
D.
Procedure
S 866-020-N00
(1) For the applicable engine, open this circuit breaker and install a DO-NOT-CLOSE tag:
(a) P6 Main Power Distribution Panel
1) 6H26 ENG 1 & 2 VIB AMP
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77-31-00
ALL ú ú N01 Page 601 ú Jun 18/99
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
////////////////////////A / PW4000 SERIES /747-400 / ENGINES/MAINTENANCE MANUAL ////////////////////////
2) 6H27 ENG 3 & 4 VIB AMP
S 016-004-N00
(2)
Open the right fan cowl panel (AMM 71-11-04/201).
S 036-005-N00
(3)
Disconnect the electrical connector from the Wiring Interface Unit (WIU) for the applicable engine.
~...................... | ENGINE | CONNECTOR | ........................ | 1 | DW1166A | ........................ | 2 | DW1166D | ........................ | 3 | DW2138C | ........................ | 4 | DW2130C | 2.........…............1
S 496-006-N00
(4) Connect the jumper wire between the applicable pin and the electrical ground.
~........................ | CONNECTOR | PIN | .......................... | DW1166A | A1 | .......................... | DW1166D | D7 | .......................... | DW2138C | C1 | .......................... | DW2130C | C7 | 2...........…............1
S 036-007-N00
(5)
Disconnect the electrical connector, DT677, from the engine accelerometer, T677.
S 766-008-N00
(6)
Make sure there is less than 10 ohms of resistance between pin 1 of the connector, DT677, and the electrical ground.
(7)
Disconnect the jumper wire.
S 096-009-N00
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77-31-00
ALL ú ú N01 Page 602 ú Jun 18/99
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
S 766-010-N00
(8)
Make sure there is more than 100K ohms of resistance between pin 1 of the connector, DT677, and the electrical ground.
S 496-011-N00
(9)
Connect the jumper wire between the applicable pin and the electrical ground.
~........................ | CONNECTOR | PIN | .......................... | DW1166A | A2 | .......................... | DW1166D | D8 | .......................... | DW2138C | C2 | .......................... | DW2130C | C8 | 2...........…............1
S 766-012-N00
(10)
Make sure there is less than 10 ohms of resistance between pin 2 of the connector, DT677, and the electrical ground.
S 096-013-N00
(11)
Disconnect the jumper wire.
S 766-014-N00
(12)
Make sure there is more than 100K ohms of resistance between pin 2 of the connector, DT677, and the electrical ground.
S 766-015-N00
(13)
Make sure there is more than 100K ohms of resistance between the casing of the connector, DT677, and the electrical ground.
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