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A
747-400 MAINTENANCE MANUAL
 D. Procedure
 S 034-080
 (1)  Remove the screws (6), washers (8), and nuts (9) at the terminal lugs (10) A/1 and B/2 at each end of the detector element (3).
 S 034-081
 CAUTION:_______DO NOT TWIST OR BEND THE DETECTORS WHEN YOU REMOVE THEM. THIS CAN CAUSE DAMAGE TO THE DETECTORS.
 (2)  Remove the retaining nut (4) that holds the detector terminal lugs (10) to the support tube end bracket (5) at each end of the detector.
 NOTE: Some end brackets (5) are installed on the engine support
____ bracket (1). Remove the nuts before you remove the detector element.
 S 034-082
 (3)  
Remove the bracket screws (14), washers (16), and nuts (17) on each bracket.

 S 024-083

 (4)  
Remove the detector assembly which contains the detector element (3) with the support tube (2).

 TASK 26-11-02-404-098
 5. Install the Engine Fire and Overheat Assembly (Fig. 402)
_____________________________________________
 A. Parts
 ~.............................................................................. | AMM | | AIPC | ................. ............................ | FIG | ITEM | NOMENCLATURE | SUBJECT | FIG | ITEM | ................................................................................ | 402 | 3 |Detector Assembly - (Upper Forward)| 26-11-02 | 01 | 30 | | | | (Upper Aft) | | | 70 | | | | (Lower Forward)| | | 110 | | | | (Lower Aft) | | | 150 | | | 14 |Bracket Screw | | | 5,7 | | | 16 |Washer | | |10,13 | | | 17 |Nut | | |15,17 | 2......…........…...................................…..........….....….........1
 B. References
 (1)  
24-22-00/201, Manual Control

 (2)  
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

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 ALL  ú ú 17 Page 411 ú Oct 18/01
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
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747-400
MAINTENANCE MANUAL

 (5)  WDM 26-11-11 thru 26-11-43
 (6)  SSM 26-11-01 thru 26-11-04
 C.  Access
 (1)  Location Zones
 412 Engine 1
 422 Engine 2
 432 Engine 3
 442 Engine 4

 (2)  Access Panels
 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 Reverser 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

 D.  AIRPLANES WITH KIDDE DETECTORS; Procedure
 S 424-099
 CAUTION:_______DO NOT TWIST OR BEND THE DETECTORS WHEN YOU INSTALL THEM. THIS CAN CAUSE DAMAGE TO THE DETECTORS.
 (1)  Put the detector element (3) and support tube (2) on the support brackets.
 S 434-100
 (2)  Install the bracket screws (14), washers (16), and nuts (17) on each support bracket (15).
 NOTE: Some end brackets (5) are attached to the engine support
____ brackets (15). Install the nuts on the end bracket before you connect the terminal lug.
 S 764-133
 (3)  Make sure the resistance between the terminal lugs (10) A/1 and B/2 and the primary structure of the airplane is not more than 0.010 ohm.
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 ALL  ú ú 18 Page 412 ú Oct 18/01
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
747-400
MAINTENANCE MANUAL

 (4)  S 914-102Attach the retaining nuts (4) with a lockwire if not already installed.
　
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