SDR USAA20100902BA042

Service difficulty report · Fuse · Airbus A330323

Difficulty date: September 1, 2010
Submitted: September 2, 2010
Operation: Air carrier
Aircraft: N272AY
Make and model: Airbus A330323
Aircraft serial: 0333
System (JASC): 3350 · Emergency Lighting
Part: Fuse
Part number: 77943573
Condition: Failed
Location: Power Supply
Part time: 49,478 hours
Component: Power Supply · Diehl
Component part number: 32146210
Stage of operation: IN
How discovered: C
Nature of condition: L
Precautionary procedure: K

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

What was found

THE EMERGENCY POWER SUPPLY UNIT (EPSU) AT L2 ENTRY SHOWS "UNIT FAULT" WHEN TESTED. REPLACED L2 EPSU. RE-SOLDERED WEAK CONNECTIONS UNDER CONVERTER U12. REPLACED PARTS (FUSE 4A 250 TR5T19372-4A, MPN 779-435-73), UNIT ASSEMBLED, CLEANED AND PASSED FUNCTIONAL TEST.

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