SDR USAABB04014

Service difficulty report · Apu · Boeing 7672B7

Difficulty date: January 27, 2004
Submitted: March 30, 2004
Operation: Air carrier
Aircraft: N653US
Make and model: Boeing 7672B7
Aircraft serial: 24894
System (JASC): 4900 · Airborne Auxiliary Power Unit (APU) System
Part: Apu
Condition: Shutdown
Location: Apu Bay
Stage of operation: IN
How discovered: C
Nature of condition: H
Precautionary procedure: K

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

What was found

SJU - WITH THE LT IDG ON MEL, THE APU WAS OPERATING ON THE GROUND. APU PERFORMED AN AUTO SHUTDOWN. APU WAS RESTARTED AND SHUTDOWN AGAIN. AFTER SEVERAL ATTEMPTS AT REPLACING COMPONENTS, SURGE VALVE, ECU, LCIT SENSOR, THE APU WAS REPLACED. A VERIFICATION FLIGHT WAS PERFORMED SUCCESSFULLY ON 12 FEB 04. (M)

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