(d)
Tighten the bolt (11) to 36-40 pound-inches (4.1-4.5 newton-meters).
S 432-009-N00
(8)
Attach the W1 cable to the mount bracket:
(a)
Remove the bolt (1) from the tab of the upper front mount bracket.
(b)
Put the cushioned clamp (2) that is on the W1 cable to the tab of the mount bracket.
(c)
Attach the cushioned clamp (2) with the bolt (1), threads lubricated with engine oil.
(d)
Tighten the bolt to 36-40 pound-inches (4.1-4.5 newton-meters).
S 412-010-N00
(9)
Close the fan cowl panels (AMM 71-11-04/201).
S 862-011-N00
(10)
For the applicable engine, remove the DO-NOT-CLOSE tags and close these circuit breakers:
(a)
P6 Main Power Distribution Panel
1) 6G15 SCU ALT PWR ENG 1
2) 6G16 SCU ALT PWR ENG 2
3) 6G17 SCU ALT PWR ENG 3
4) 6G18 SCU ALT PWR ENG 4
5) 6G23 ENG SCU 1
6) 6G24 ENG SCU 2
7) 6G25 ENG SCU 3
8) 6G26 ENG SCU 4
S 712-013-N00
(11) Do the test for the supplemental control unit (SCU) which is shown in the Power Plant Test Reference Table (AMM 71-00-00/501).
TASK 73-21-15-802-014-N00
3. Remove and Install the Supplemental Control Unit (SCU) from the Flight______________________________________________________________________ Position to the Storage Position on the Fan Case________________________________________________
A. Consumable Materials
(1)
D00137 Engine Oil, PWA 521
B.
References
(1)
AMM 71-11-04/201, Fan Cowl Panels
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A
747-400
MAINTENANCE MANUAL
C. Access
(1)
Location Zones
410 Engine No. 1
420 Engine No. 2
430 Engine No. 3
440 Engine No. 4
(2)
Access Panels
413 and 414 Fan Cowl Panels - Engine 1
423 and 424 Fan Cowl Panels - Engine 2
433 and 434 Fan Cowl Panels - Engine 3
443 and 444 Fan Cowl Panels - Engine 4
D.
Procedure
S 862-015-N00
(1)
For the applicable engine, open these circuit breakers and attach the DO-NOT-CLOSE tags:
(a)
P6 Main Power Distribution Panel
1) 6G15 SCU ALT PWR ENG 1
2) 6G16 SCU ALT PWR ENG 2
3) 6G17 SCU ALT PWR ENG 3
4) 6G18 SCU ALT PWR ENG 4
5) 6G23 ENG SCU 1
6) 6G24 ENG SCU 2
7) 6G25 ENG SCU 3
8) 6G26 ENG SCU 4
S 012-017-N00
(2)
Open the fan cowl panels (AMM 71-11-04/201).
S 032-018-N00
(3)
Disconnect the W2P34 wiring harness connector (10) and the W2P33 wiring harness connector (9) from the rear side of the SCU.
(a)
Install protection covers on the electrical connectors on the SCU and the wiring harness.
S 032-019-N00
(4)
Disconnect the W2 cable from the mount bracket:
(a)
Remove the bolt (11) from the cushioned clamp (12) that attaches the W2 cable to the tab on the upper rear mount bracket of the SCU.
(b)
Loosen the cushioned clamp (12) from the mount bracket, install the bolt (11) into the same hole in the tab of the mount bracket and tighten sufficiently to engage the self-locking threads of the nut plate.
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ALL ú ú N01 Page 209 ú Feb 15/99
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
747-400 MAINTENANCE MANUAL
S 032-020-N00
(5)
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