757
MAINTENANCE MANUAL

TEST PANEL MODULE, M10398

P61 PANEL DUCK LEAK TEST SWITCH
A

Duct Leak Detection - Component Location
Figure 501

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A 757 MAINTENANCE MANUAL
 ú ú S 985-041 ú (3) Do the engine shutdown input removal procedure (AMM 31-41-00/201).
 NOTE: Master CAUTION, owl aurals, and a number of engine messages
____ are inhibited when engines do not operate.
 S 985-005
 (4)  
Hold the DUCT LEAK/FUEL QTY switch on the miscellaneous test panel on the P61 panel in the DUCT LEAK position.

 S 285-051

 (5)  
Make sure these warnings occur:

 (a)  
The yellow DUCT LEAK lights on the bleed air supply panel on the P5 panel come on (2 places).

 (b)  
The yellow L and R BLD DUCT LEAK messages are shown on the EICAS displays.

 (c)  
The yellow master CAUTION lights on the P7 panel come on.

 (d)  
The owl aural warning is heard.

 S 985-007
 (6)  
Release the switch and make sure the warnings go off.

 S 865-006

 (7)  
Remove electrical power if it is not necessary (AMM 24-22-00/201).

 TASK 26-18-00-725-008
 3. System Test - Wing and Body Duct Leak Detection
_______________________________________________
 A. References
 (1)  
AMM 24-22-00/201, Electrical Power - Control

 (2)  
AMM 31-41-00/201, Engine Indication and Crew Alerting Sytem (EICAS)

 (3)  
AMM 31-41-00/501, Engine Indication and Crew Alerting System (EICAS)

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

 B. Access
 (1)  
Location Zones
 100 Lower Half of Fuselage
 120 Main Equipment Center (Right)
 212 Control Cabin (Right)
 530/630 Wing Area (Right & Left)

 (2)  
Access Panel
 119BL Main Equipment Center

 C. Prepare for Test
 S 865-009
 (1)  Supply electrical power (AMM 24-22-00/201).
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 ALL  ú ú 01.1 Page 503 ú Sep 28/02
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A

757
MAINTENANCE MANUAL

 S 285-010
 (2)  Make sure these systems operate:
 (a)  
EICAS (AMM 31-41-00/501)

 (b)  
Master Dim and Test System (AMM 33-16-00/501)

 S 985-052
 (3) Do the level B message preparation procedure (AMM 31-41-00/501).
 NOTE: Level B EICAS messages are inhibited when engines are not
____
 running.

 D. Test the Wing and Body Duct Leak Detection System
 S 865-012
 (1)  Open these circuit breakers on the overhead panel P11 and attach DO-NOT-CLOSE tags.
 (a)  
11Q17, DUCT LEAK DET LEFT

 (b)  
11Q25, DUCT LEAK DET RIGHT

 (c)  
11Q26, DUCT LEAK CONT

 S 035-013
 (2)  
Disconnect the D1956 connector from the detector element TS5167 at the left A/C pack bay (STA 915, WL 160 and LBL 40).

 S 425-014

 (3)  
Connect a jumper between the center pin of D1956 and the center conductor of detector element TS5167.

 S 425-015

 (4)  
Connect a jumper between the center conductor of dectector element TS5167 and the inconel tubing of detector element TS5167.

 S 035-016

 (5)  
Disconnect the connector D1996 from the detector element TS5191 at right of the A/C pack bay (STA 1101, WL 160 and RBL 62).

 S 425-017

 (6)  
Connect a jumper between the center pin of D1996 and the center conductor of detector element TS5191.
　
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