Service difficulty report · Idg · Airbus A320231

Difficulty date
November 12, 2004
Submitted
November 15, 2004
Operation
Air carrier
Aircraft
N631AW
Make and model
Airbus A320231
Aircraft serial
077
Aircraft time
47,887 hours, 21,635 cycles
Part
Idg
Part number
766219
Part serial
W0114
Condition
Failed
Location
Nr 1 Engine
Part time
22,318 hours, 8,687 cycles
Stage of operation
CR
How discovered
O
Nature of condition
G, J
Precautionary procedure
A

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

What was found

3 SHARP JOLTS OCCURRED IN YAW APPROX 45 SEC TO 1 MIN APART. AFTER 2ND JOLT RECEIVED ECAM INDICATION NR 1 GEN FAULT, AFTER 3RD JOLT ECAM INDICATED AUTO/FLT YAW DAMP NR 1 INOP, DIVERTED, LANDED W/O EVENT. MX ISSUED MELS. YAW DAMP NR 1 INOP. NR 1 IDG INOP. MX INSPECTED NR 1 GEN FEEDER CABLES FOR POSSIBLE ARCING, NO DEFECTS NOTED. R & R NR 1 ENG IDG. FOUND APU GEN SWITCH NOT LATCHING, REPLACED PUSH BUTTON SWITCH PER ESPM, OPS CK GOOD. IDG CONFIRMED REASON FOR REMOVAL. TEARDOWN OF UNIT FOUND GENERATOR MAIN STATOR WINDING SHORTED WITH A HOLE BLOWN THROUGH IT, THIS CONDITION WOULD CERTAINLY RESULT IN AN OFF LINE TRIP, REMOVED AN REPLACED GENERATOR MAIN STATOR.

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