Service difficulty report · Relay · Boeing 7673JHF

Difficulty date
June 10, 2021
Submitted
June 14, 2021
Operation
Air carrier
Aircraft
N644GT
Make and model
Boeing 7673JHF
Aircraft serial
37810
Aircraft time
21,771 hours, 5,185 cycles
Engine
Ge CF680C2B7F
Part
Relay
Part number
BACR13CG2A
Condition
Faulted
Location
Start Valve
Stage of operation
TX
How discovered
O
Nature of condition
O
Precautionary procedure
O

As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.

What was found

ON START ENG START, LEFT VALVE LIGHT DOES NOT COME ON WITH ASSOCIATED LEFT ENG PRIM HYD PRESS LIGHT AND EICAS MSG UNTIL ENGINE START SWITCH IN AUTO AND THEN LEFT ENG START VALVE LIGHT CYCLES ON AND THEN OFF DURING LEFT ENG START, NORMAL N1 AND N2 ROTATION.(<P>ACCOMPLISHED L-EDP OPERATION CHECK OK. THEN HYD PRESS LIGHT NORMAL PER AMM 29-11-00 AND L-ENG START VLV LIGHT DOES NOT COME ON BY ENG MOTORING. ITEM DEFERRED PER MEL 80-00-01-01, DUE 20JUN21, DMI 148341. INSTALLED INOP PLACARD.</P><P>LP 1483010: FOUND THE W5324-020-20 WIRE WAS CHAFFED FROM D24230P PLUG TO D10970 PLUG. REPAIRED THE WIRE WITH SPLICE AND CHECKED OK PER WDM 80-11-11 AND SWPM 20-30-19 ALSO REMOVED AND REPLACED K665 LEFT ENG START 1 RELAY AND THEN LEFT ENG START VALVE LIGHT CHECKED OKAY PER WDM 80-11-11 AND AMM 80-11-001/501. THIS CLEARS MDDR 148341. PLAC REMOVED.</P>)

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