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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
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757
MAINTENANCE MANUAL

 S 034-005
 (3)
Remove the bracket bolts, washers and spacers, and the bracket.

 S 024-007

 (4)  
Remove the bolt and the overheat detection switches from the mixer block.

 S 434-008

 (5)  
Install approved plugs into all of the openings.

 TASK 26-13-01-424-009
 3. Install the Overheat Detection Switch (Fig. 401)
_____________________________________
 A. References
 (1)  
AMM 24-22-00/201, Electrical Power Control

 (2)  
AMM 70-51-00/201, Torque Tightening Technique

 (3)  
AMM 78-31-00/201, Thrust Reverser System, Fan C-Duct and Thrust Reverser Opening and Closing.

 B. Access
 (1)  
Location Zones
 119/120 Main Equipment Center
 200 Upper Half of Fuselage
 211/212 Flight Compartment

 (2)  
Access Panels
 413, 423 L, R Fan Cowl Panel (Left)
 414, 424 L, R Fan Cowl Panel (Right)
 415, 425 L, R Fan Reverser (Left)
 416, 426 L, R Fan Reverser (Right)

 C. Prepare to install the Overheat Detection Switch
 S 754-010
 (1)  Make sure these circuit breakers on the overhead circuit breaker panel, P11, are open and attach DO-NOT-CLOSE tags:
 (a)  11B19 or 11B20, FIRE DETECTION L ENGINE 1
 EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú

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757 MAINTENANCE MANUAL
 (b)  
11B20 or 11B21, FIRE DETECTION L ENGINE 2

 (c)  
11B21 or 11B22, FIRE DETECTION R ENGINE 1

 (d)  
11B22 or 11B23, FIRE DETECTION R ENGINE 2

 (e)  
11J26, FIRE DET ALTN PWR ENGINE LEFT

 (f)  
11J27, FIRE DET ALTN PWR ENGINE RIGHT

 S 034-011
 (2)  
Remove the plugs from the openings.

 S 754-012

 (3)
Make sure the surfaces that touch are clean and free from damage.

 D. Install the Overheat Detection Switch 1
 S 424-015
 (1)  Install the detection switch and tighten with the bolt
 (AMM 70-51-00/201).

 S 434-016
 CAUTION: INSTALL THE HEAT SHRINK SLEEVES ALONG THE WIRES AND THE
_______ TERMINALS ON THE SWITCH TO PREVENT MOISTURE CONTAMINATION. CONTAMINATION OF THE TERMINAL CAN CAUSE THE SYSTEM TO OPERATE INCORRECTLY.
 (2)  Install the cable terminal lugs on the terminal posts with the terminal nuts and tighten to 25 lb-in (2.82 Nm).
 NOTE: Do not adjust the position of the cable terminals after the
____
 terminal nuts have been tightened.

 NOTE: Do not apply a side load when you tighten the terminal nuts.
____
 S 424-018
 (3)  Install the bracket and tighten with the bracket bolts, washers and spacers (AMM 70-51-00/201).
 NOTE:____The bolt and washer install correctly into hole B. Hole A is not used.
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757 MAINTENANCE MANUAL
 E. Install the Overheat Detection Switch 2
 S 424-030
 (1)  Install the cable terminal lugs on the terminal posts with the terminal nuts and tighten to 25 lb-in (2.82Nm).
 NOTE: Do not adjust the position of the cable terminals after the
____
 terminal nuts have been tightened.

 NOTE: Do not apply a side load when you tighten the terminal nuts.
　
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