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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
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757 MAINTENANCE MANUAL
 D.  Do a Test of the Nacelle Overheat System:
 S 865-038
 (1)  Open these P11 panel 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

 S 035-125
 (2)  Prepare the detectors.
 (a)  
Disconnect the electrical connectors, D2122 and D2402, from the nacelle overheat detectors, TS5064 and TS5065.

 (b)  
Connect a jumper wire between pins A and D on connectors D2122 and D2402.

 S 865-043
 (3)  Remove the DO-NOT-CLOSE tags and close these circuit breakers on the P11 panel:
 NOTE: Both of the circuit breakers must be closed at the same time.
____
 (a)  
11B20, FIRE DETECTION L ENGINE 1

 (b)  
11B21, FIRE DETECTION L ENGINE 2

 S 755-044
 (4)  Make sure these indications occur:
 (a)  
The caution annunciation is heard.

 (b)  
The yellow L ENG OVHT light, on P8, comes on.

 (c)  
The EICAS message L ENG OVHT shows on the top display.

 1)  The EICAS messages L ENG OH LP 1 and L ENG OH LP 2 show on the bottom display.

 (d)  
The yellow master CAUTION lights, on P7, come on.

 S 865-045
 (5)  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

 S 425-126
 (6)  Return the detectors to normal.
 (a) Remove the jumper wires from connector D2122 and D2402.
 EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú

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 ALL  ú ú 01 Page 509 ú Jan 20/98
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
757 MAINTENANCE MANUAL
 (b)  Connect the electrical connector, D2122, to TS5064 and the electrical connector, D2402, to TS5065.
 E. Do a Test of the Fire Detector.
 S 845-132
 (1)  AIRPLANES WITH ROLLS ROYCE ENGINES AND SYSTRON-DONNER FIRE
 DETECTORS;
 Prepare the detectors.

 (a)  
Disconnect electrical connectors, D1406 and D1408, from the engine fire detectors, TS5037 and TS5036.

 (b)  
Connect a jumper wire between pins A and D on electrical connectors D1406 and D1408.

 S 845-190
 (2)  AIRPLANES WITH ROLLS ROYCE ENGINES AND GRAVINER FIRE DETECTORS; Prepare the detectors.
 (a)  
Disconnect electrical connectors, D1450 and D1452, from the engine fire detectors, TS5148 and TS5147.

 (b)  
Connect a jumper wire between the center conductor of fire detector TS5148 and ground.

 (c)  
Connect a jumper wire between the center conductor of the fire detector, TS5147, and ground.

 S 865-055
 (3)  Remove the DO-NOT-CLOSE tags, and close these circuit breakers on the P11 panel:
 NOTE: Close the two circuit breakers at the same time.
____
 (a)  
11B20, FIRE DETECTION L ENGINE 1

 (b)  
11B21, FIRE DETECTION L ENGINE 2

 S 755-056
 (4)  Make sure these indications occur:
 (a)  
The red LEFT engine fire handle light, on P8, comes on.

 (b)  
The red L FUEL CONTROL switch light, on the quadrant control stand, P10, comes on.

 (c)  
The red FIRE light, on the captains instrument panel, P1-3, comes on.

 (d)  
The EICAS message L ENGINE FIRE shows on the top display.

 (e)  
The EICAS messages L ENG FIRE LP 1 and L ENG FIRE LP 2 show on the bottom display.

 (f)  
The red master WARNING lights, on the glareshield panel, P7, comes on.

 (g)  
The fire bell is heard.

 S 865-057
 (5)  Open these circuit breakers on the P11 panel and attach DO-NOT-CLOSE tags:
 (a)  11B20, FIRE DETECTION L ENGINE 1
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