SDR UALA2008111302602

Service difficulty report · Wire · Boeing 737322

Difficulty date: May 4, 2008
Submitted: December 23, 2008
Operation: Air carrier
Aircraft: N367UA
Make and model: Boeing 737322
Aircraft serial: 24536
Aircraft time: 52,595 hours, 36,338 cycles
Engine: Cfmint CFM563C1
System (JASC): 4997 · APU System Wiring
Part: Wire
Condition: Burned
Location: Apu
Stage of operation: IN
How discovered: V
Nature of condition: O
Precautionary procedure: K

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

What was found

FOUND GENERATOR LEAD WIRES BURNT AND ARCING ON OIL PUMP, NEEDS REPLACEMENT. UNDER INVESTIGATION 5/19/08. REPLACED APU FEEDER CABLES. REMOVED AND REPLACED OIL PUMP ASSEMBLY. REPLACED APU GENERATOR AND OIL COOLER AND REPLACED GENERATOR FEEDER CABLE. PER MM 49-11-00 -401, OPS CK'S GOOD, NO FAULTS STARTED AND RAN APU WITH FULL ELEC LOAD AND GENERATOR OPERATED NORMAL. SHUT DOWN AND REPEATED THE CHECK WITH SAME RESULT. OK FOR SERVICE. REOPENED ON 03MAY08 DUE TO APU GEN INOP AGAIN.