S 865-045
(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)
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
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S 865-046
(3) Remove electrical power if it is not necessary (Ref 24-22-00).
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ENGINE TURBINE COOLING OVERHEAT SWITCH - REMOVAL/INSTALLATION
_____________________________________________________________
1. General
_______
A. Two differential expansion switches, which are temperature sensitive, are used to detect overheat of the turbine cooling air. These detection switches are installed externally to the IP turbine. They are above the centerline on the left side when seen from the rear of the engine. Get access to the switches through the left thrust reverser cowl duct.
TASK 26-13-01-024-001
2. Remove the Overheat Detection Switch (Fig. 401)
____________________________________
A. References
(1) 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. Remove the Overheat Detection Switch
S 864-002
(1) Open these circuit breakers on the overhead circuit breaker panel, P11, DO-NOT-CLOSE tags:
(a)
11B19 or 11B20, FIRE DETECTION L ENGINE 1
(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 014-003
WARNING: OBEY THE INSTRUCTIONS IN AMM 78-31-00/201 WHEN YOU OPEN THE
_______ THRUST REVERSERS. IF YOU DO NOT OBEY THE INSTRUCTIONS, INJURY TO PERSONS OR DAMAGE TO EQUIPMENT CAN OCCUR.
(2) Open the fan C-duct and the thrust reverser left half (AMM 78-31-00/201).
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MAINTENANCE MANUAL
BRACKET MOUNTING BOLTS
PROTECTOR BRACKET
WASHERS BRACKET MOUNTING BOLT
WASHER SEE A
HOLE "A"
HOLE "B" DETECTION SWITCH 2 (UPPER), S10140
SEE B SPACER
SPACER
SPACER MIXER BLOCK
MOUNTING
BOLT DETECTION
TERMINAL NUT SWITCH 1 (LOWER),
S10139
A
CABLE TERMINAL
TERMINAL POST
ENGINE TURBINE COOLING OVERHEAT DETECTION SWITCH
B
Engine Turbine Cooling Overheat Detection Switch Installation Figure 401
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