(e)
The master CAUTION lights, on P7, come on.
S 755-009
(4)
Release the ENG test switch and make sure the indications stop.
S 865-060
(5)
Close these circuit breakers on the P6 panel and remove the DO-NOT-CLOSE tags:
(a)
6C1, FUEL COND CONT L
(b)
6C2, FUEL COND CONT R
(6)
Remove electrical power if it is not necessary (AMM 24-22-00/201).
S 865-010
TASK 26-12-00-735-011
3. System Test - Strut Overheat Detection System
_____________________________________________
A. References
(1) AMM 06-43-00/201, Engine Nacelle Access Doors and Panels
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MAINTENANCE MANUAL
(2)
AMM 24-22-00/201, Electrical Power Control
(3)
AMM 31-41-00/501, Engine Indication and Crew Alerting System (EICAS)
(4)
AMM 31-51-00/501, Warning System
(5)
AMM 33-16-00/501, Master Dim and Test
B. Access
(1)
Location Zones
119/120 Main Equipment Center
200 Upper Half of Fuselage
211/212 Flight Compartment
430/440 Engine No. 1/No. 2 Nacelle strut
(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)
432AL/433JR/433LR Left Strut - No. 1 Engine
442AL/443HL/443LL Right Strut - No. 2 Engine
C. Prepare for Test
S 865-012
(1)
Supply electrical power (AMM 24-22-00/201).
S 035-014
(2)
Remove the strut access panels (AMM 06-43-00/201).
S 755-013
(3)
Make sure these systems operate:
(a)
EICAS (AMM 31-41-00/501).
(b)
Warning system (AMM 31-51-00/501).
(c)
Master dim and test system (AMM 33-16-00/501).
S 865-063
(4) Open these circuit breakers on the overhead circuit breaker panel, P11, and attach DO-NOT-CLOSE tags:
(a)
11J26, FIRE DET ALTN PWR ENGINE LEFT
(b)
11J27, FIRE DET ALTN PWR ENGINE RIGHT
S 865-064
(5) Open these circuit breakers on the main power distribution panel, P6, and attach DO-NOT-CLOSE tags:
(a) 6C1, FUEL COND CONT L
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757 MAINTENANCE MANUAL
(b) 6C2, FUEL COND CONT R
D. Do a Test of the Strut Overheat Detection System
S 865-015
(1) Open these circuit breakers on the P11 panel and attach DO-NOT-CLOSE tags:
(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
S 755-016
(2) Make sure these indications occur:
(a)
The SYS FAIL light is not on (on P8).
(b)
The L and R ENG OVHT lights are not on (on P8).
(c)
The EICAS messages L and R ENG OVHT do not show on the top display.
S 865-017
(3)
Push the ECS MSG switch on the EICAS maintenance panel, P61.
S 755-018
(4)
Make sure the EICAS message STRUT OH DET or ENG OH LP do not show on the bottom display.
S 865-019
(5)
Remove the DO-NOT-CLOSE tags and close these circuit breakers on the P11 panel at the same time:
(a)
11B20, FIRE DETECTION L ENGINE 1
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