(2)
AMM 26-11-00/501, Engine Fire Detection System

 (3)
AMM 71-11-06/201, Core Cowl Panels

 (4)
AMM 78-31-00/201, Thrust Reverser System

 (5)
WDM 26-11-11 thru 26-11-43

 (6)
SSM 26-11-01 thru 26-11-04

 E.
Access

 (1)  
Location Zone
 412 Engine 1
 422 Engine 2
 432 Engine 3
 442 Engine 4

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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
747-400
MAINTENANCE MANUAL

 (2)  Access Panel
 415 Left thrust Reverser Half - Engine 1
 416 Right Thrust Reverser Half - Engine 1
 417 Left Core Cowl - Engine 1
 418 Right Core Cowl - Engine 1
 425 Left Thrust Reverser Half - Engine 2
 426 Right Thrust Reverser Half - Engine 2
 427 Left Core Cowl - Engine 2
 428 Right Core Cowl - Engine 2
 435 Left Thrust Reverser Half - Engine 3
 436 Right Thrust Revserser Half - Engine 3
 437 Left Core Cowl - Engine 3
 438 Right Core Cowl - Engine 3
 445 Left Thrust Reverser Half - Engine 4
 446 Right Thrust Reverser Half - Engine 4
 447 Left Core Cowl - Engine 4
 448 Right Core Cowl - Engine 4

 F. Procedure
 S 434-030
 (1)  Install the T681, T682, T683, or T684 terminal lugs (10) A/1 and B/2 into the end bracket (5) on one side of the detector.
 S 424-136
 (2) Put the flat side of the terminal lug (10) on the detector element perpendicular to the base of the end bracket (5) assemblies.
 S 434-031
 (3)  Attach the terminal lug (10) with the retaining nut (4).
 S 434-117
 (4)  Use the 5/8 inch boxed end wrench to torque the retaining nut (4) to 100 pound-inches(11.0 newton-meters).
 S 424-032
 CAUTION: DO NOT TWIST OR BEND THE DETECTOR ELEMENTS WHEN YOU INSTALL THE
_______ DETECTOR. THIS CAN CAUSE DAMAGE TO THE DETECTOR ELEMENT.
 (5)  Put the detector element (3) along the support tube (2).
 (a)  Make sure there is not too much slack between any two clamps (1).
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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
747-400 MAINTENANCE MANUAL
 S 434-033
 (6)  Install the grommets (12) on the detector element (3) at the
 quick-release clamps (1).
 S 434-034
 (7)  Put the detector element (3) with the grommets (12) in the
 quick-release clamp (1), and tighten the stud (13) to attach the
 detector element.
 NOTE:____ Do not install the element into the last 2 or 3 clamps.

 S 414-064
 (8)  
Install the remaining end of the detector element (3) in the end bracket (5).

 S 414-065

 (9)  
Put the flat side of the terminal lug (1) on the detector element (3) perpendicular to base of the end bracket (5).

 S 434-066

 (10)
 Attach the terminal lug (10) with the retaining nut (4).

 (a)  Use the 5/8 inch boxed end wrench to torque the retaining nut (4) to 100 pound-inches(11.0 newton-meters).
 S 434-074
 (11)
 Replace the damaged grommets and those not there on the applicable detector assembly.

 S 414-067

 (12)
 Put the remaining part of the detector element (3) along the remaining quick-release clamps (1).

 (a)  Make sure there is not too much element (3) between any two quick-release clamps (1). If it is necessary, loosen the previously tightened clamps to distribute the element equally along the full length of the support tube (2).
 S 434-069
 (13)
 Tighten the stud (13) to attach the remaining quick-release clamps (1).

 S 224-070

 (14)
　
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