# SDR AALA2009061200006

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: June 12, 2009
- Submitted: July 2, 2009
- Operation: Air carrier
- Aircraft: N9304C
- Make and model: Doug DC-9-83
- Registry model: [Doug DC-9-83](https://openairdocs.org/model/douglas-dc-9-83) (OpenAirDocs)
- Aircraft serial: 49530
- Aircraft time: 60,619 hours, 30,419 cycles
- System (JASC): [4920 · APU Core Engine](https://openairdocs.org/jasc/4920)
- Part: Apu
- Part number: AAP3702A
- Part serial: P3059
- Condition: Failed
- Location: Apu Bay
- Stage of operation: CR
- How discovered: O
- Nature of condition: O
- Precautionary procedure: A
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/AALA2009061200006

## Discrepancy

PSP - INFLIGHT LAX-ORD.  AUXILIARY POWER UNIT FAILED IN FLIGHT AUTO SHUTDOWN.  EMERGENCY DECLARED, RETURNED TO LAX WITHOUT INCIDENT.  AIRCRAFT REMOVED FROM SERVICE.  REPLACED AUXILIARY POWER UNIT.

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