# SDR DALA2015092805853

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: September 25, 2015
- Submitted: September 29, 2015
- Operation: Air carrier
- Aircraft: N937DL
- Make and model: Doug MD-88
- Registry model: [Doug MD-88](https://openairdocs.org/model/mcdonnell-douglas-md-88) (OpenAirDocs)
- Aircraft serial: 49810
- Aircraft time: 69,239 hours, 52,075 cycles
- System (JASC): [4990 · APU Oil System](https://openairdocs.org/jasc/4990)
- Part: Oil System
- Condition: Leaking
- Location: Apu
- Stage of operation: CR
- How discovered: O
- Nature of condition: K, B, J
- Precautionary procedure: A
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/DALA2015092805853

## Discrepancy

THE FLIGHT RETURNED TO DEPARTURE FOLLOWING THE AFT LAVATORY SMOKE DETECTOR SOUNDING AND THE F/A SMELLING SMOKE.  MAINTENANCE FOUND THE APU LEAKING OIL.  THE APU WAS REPLACED, APU AND A PNEUMATIC SYSTEM DUCT BURNOUT WAS ACCOMPLISHED.

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