Service difficulty report · Wire Harness · Boeing 777222

Difficulty date
November 17, 2010
Submitted
December 1, 2010
Operation
Air carrier
Aircraft
N786UA
Make and model
Boeing 777222
Aircraft serial
26938
Aircraft time
59,797 hours, 8,754 cycles
Engine
Pwa PW40903
Engine time
38,079 hours, 5,024 cycles
Part
Wire Harness
Part number
420805
Condition
Faulty
Location
Nr 2 Engine
Stage of operation
NR
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

NR 2 ENG HARNESS W0625. 2.9 START BLEED VALVE FAULT 75-41052 CH-A AND 75-51052 CH-B HAVE RECURRED SINCE 26OCT WHEN CONNECTORS WERE CLEANED AND CH-B TC PROBE WAS REPLACED. LAX MM TROUBLESHOOTING 26OCT SAID 'IF HIT AGAIN SUSPECT HARNESS WO625'. REPLACED HARNESS W0625. DUE TO THE REPLACEMENT OF HARNESS W0625 ON ENG NR 2, NEED TO ACCOMPLISH SYSTEM STATIC TEST AND EEC IDLE CHECK. ACCOMPLISHED SYSTEM STATIC TEST, OPS NORMAL. TEST NR 6 OKAY.