# SDR AALA201608049006

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: August 3, 2016
- Submitted: August 8, 2016
- Operation: Air carrier
- Aircraft: [N973UY](https://openairdocs.org/aircraft/N973UY), registered now
- Make and model: Airbus A321-231
- Registry model: [Airbus A321-231](https://openairdocs.org/model/airbus-a321-231) (OpenAirDocs)
- Aircraft serial: 4893
- Aircraft time: 17,543 hours, 6,471 cycles
- Engine: Iae V2533A5
- Engine time: 17,570 hours, 6,483 cycles
- System (JASC): [4920 · APU Core Engine](https://openairdocs.org/jasc/4920)
- Part: Apu
- Part number: 38007081
- Part serial: P4905
- Condition: Leaking
- Location: Zone 100
- Part time: 17,570 hours, 6,483 cycles
- Stage of operation: IN
- How discovered: O
- Nature of condition: B
- Precautionary procedure: H
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/AALA201608049006

## Discrepancy

AIRCRAFT WAS GROUNDED: ON APU SHUTDOWN, SMOKE COMING FROM TAIL PIPE.  MAINTENANCE FOUND OIL LEAKING FROM THE REAR MAIN BEARINGS INTO THE APU TAIL PIPE AND REPLACED THE APU IAW TASK CARD 26L31049003.

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