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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.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