S 865-057

 (2)  
Remove the DO-NOT-CLOSE tags and close these circuit breakers on the P11 panel:

 (a)  
11B20, FIRE DETECTION L ENGINE 1

 (b)  
11B21, FIRE DETECTION L ENGINE 2

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

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

 (e)  
6C1, FUEL COND CONT L

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 (f) 6C2, FUEL COND CONT R
 S 865-058

 (3) Remove electrical power if it is not necessary (AMM 24-22-00/201).
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 STRUT OVERHEAT SWITCH - REMOVAL/INSTALLATION
____________________________________________
 1.  General_______
 A.  Six disc thermal switches are installed on the strut upper spar and rear engine mount bulkhead. These switches sense if there is too much heat around the strut structure which is caused by leakages in the engine bleed air duct. Get access to the switches through the upper strut fairing.
 TASK 26-12-01-034-016
 2.  Remove the strut Overheat Switch (Fig. 401)________________________________
 A.  References
 (1)  
AMM 06-43-00/201, Engine Nacelle Access Doors and Panels

 (2)  
AMM 24-22-00/201, Electrical Power Control

 (3)  
AMM 78-31-00/201, Thrust Reverser System

 B.  Equipment
 (1)  Torque Wrench - commercially available
 C.  Consumable Materials
 (1)  AMM 20-30-01/201, Sealant DC93-006 Dow Corning
 D.  Access
 (1)  
Location Zones
 119/120 Main Equipment Center
 200 Upper Half of Fuselage
 211/212 Flight Compartment
 430/440 No. 1/No. 2 Nacelle Strut

 (2)  
Access Panels

 (a)  
413, 423 L,R Fan Cowl Panel (Left)

 (b)  
414, 424 L, R Fan Cowl Panel (Right)

 (c)  
415, 425 L, R Fan Reverser (Left)

 (d)  
416, 426 L, R Fan Reverser (Right)

 (e)  
432AL, 433JR, 433LR Nacelle Strut - Left engine No. 1

 (f)  
442AL, 443HL, 443LL Nacelle Strut - Right Engine No. 2

 E.  Remove the Strut Overheat Switch
 S 864-001
 (1)  
Open these circuit breakers on the overhead circuit breaker panel, P11, and attach DO-NOT-CLOSE identifiers:

 (a)  
11B20, FIRE DETECTION L ENGINE 1

 (b)  
11B21, FIRE DETECTION L ENGINE 2

 (c)  
11B22, FIRE DETECTION R ENGINE 1

 (d)  
11B23, FIRE DETECTION R ENGINE 2

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

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

 (2)
Remove the strut access panels as necessary (AMM 06-43-00/201).

 S 014-002
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MAINTENANCE MANUAL

Strut Overheat Switch Installation
Figure 401

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