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S 755-013 (19) Wait for a minimum of 5 seconds.
(20) Verify the DUCT LEAK BITE message shall appear on the EICAS maintenance page.
(21) Open the following 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 035-034 (22) Disconnect the connector D1960 from the detector element TS5168 at the left A/C pack bay (STA 915, WL 160 and RBL 25). EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú
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757 MAINTENANCE MANUAL
S 435-035 (23) Connect a jumper between the center pin of D1960 and the center conductor of detector element TS5168.
(24) Connect a jumper between the center pin of connector D1960 and the inconel tubing of detector element TS5168.
(25) Disconnect the D2026 connector from the detector element TS5192 at the right A/C pack bay (STA 923, WL 160 and RBL 47).
(26) Connect a jumper between the center pin of connector D2026 and the center conductor of detector element TS5192.
(27) Connect a jumper between the center pin of connector D2026 and the inconel tubing of detector element TS5192.
(28) Remove the DO-NOT-CLOSE tags and close these circuit breakers on the P11 overhead panel.
(a) 11Q17, DUCT LEAK DET LEFT
(b) 11Q25, DUCT LEAK DET RIGHT
(c) 11Q26, DUCT LEAK CONT
S 285-040 (29) Verify the following indications within 5 seconds: (a) The left DUCT LEAK and the right DUCT LEAK lights shall illuminate on the Bleed Air Supply Panel (P5).
(b) Both CAUTION lights shall illuminate on the P7 panel.
(c) The L BLD DUCT LEAK and R BLD DUCT LEAK message shall appear on the EICAS Caution page.
(d) The DUCT LEAK BITE message shall appear on the EICAS maintenance page.
(e) The aural warning owl tone shall sound from the aural warning speakers.
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S 865-041 (30) Attach DO-NOT-CLOSE tags and open these breakers on the P11 overhead panel. (a) 11Q17, DUCT LEAK DET LEFT
(b) 11Q25, DUCT LEAK DET RIGHT
(c) 11Q26, DUCT LEAK CONT
S 035-042 (31) Remove the jumper between the center conductor of detector element TS5167 and the inconel tubing of detector element TS5167.
(32) Remove the jumper between the center pin of D1956 and the center conductor of detector element TS5167.
(33) Reconnect the connector D1956 to the detector element TS5167.
(34) Remove the jumper between the center conductor of detector element TS5191 and the inconel tubing of detector element TS5191.
(35) Remove the jumper between the center pin of conductor D1996 and the center conductor of detector element TS5191.
(36) Reconnect the connector D1996 to detector element TS5191.
(37) Remove the jumper between the center pin of connector D1960 and the inconel tubing of detector element TS5168.
(38) Remove the jumper between the center pin of connector D1960 and the center conductor of detector element TS5168.
