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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
E48135
A

757
FAULT ISOLATION/MAINT MANUAL

P11 PANEL

M10445 SEE
A FLIGHT COMPARTMENT
ENGINE TEST FAIL LIGHT SWITCH,RESET SWITCH, YQQS002 YQQS003

Engine Turbine Cooling Overheat Detection System - Component Location
Figure 102 (Sheet 1)

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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A

757
FAULT ISOLATION/MAINT MANUAL

FIRE/OVHT TEST CARDS 4 (M10425) AND 5 (M10426) IN P54
TURBINE OVERHEAT DETECTION SWITCHES
SEE B
119BL
DETECTION SWITCH 2, S10140
DETECTION SWITCH 1, S10139
TURBINE OVERHEAT DETECTION SWITCHES
B
Component Location
Figure 102 (Sheet 2)

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A
757 MAINTENANCE MANUAL
 ENGINE TURBINE COOLING OVERHEAT DETECTION SYSTEM - ADJUSTMENT/TEST
__________________________________________________________________
 1.  General_______
 A.  This section contains procedures to do an operational test and a system test of the engine turbine cooling overheat detection system.
 (1)  
The operational test makes sure the system operates correctly in a minimum of time. Use only equipment installed in the plane.

 (2)  
The system test increases the functions of the operational test. Equipment installed in the airplane and external test equipment will be used.

 TASK 26-13-00-715-007
 2.  Operational Test - Engine Turbine Cooling Overheat Detection System___________________________________________________________________
 A.  References
 (1)  
24-22-00/201, Electrical Power - Control

 (2)  
31-41-00/501, Engine Indication and Crew Alerting System (EICAS)

 (3)  
31-51-00/501, Warning System

 (4)  
33-16-00/501, Master Dim and Test

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

 (2)  
Access
 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 for the Test
 S 865-008
 (1)  
Supply electrical power (Ref 24-22-00).

 S 755-009

 (2)  
Make sure these systems operate:

 (a)  
EICAS (Ref 31-41-00).

 (b)  
Warning system (Ref 31-51-00).

 (c)  
Master dim and test system (Ref 33-16-00).

 S 865-010
 (3)  
Close these circuit breakers on the overhead circuit breaker panel, P11:

 (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

 (4)
Close the EICAS circuit breakers (six places) on the P11 panel.

 S 865-011
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