# SDR 9719499918

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: October 18, 1997
- Submitted: March 26, 2000
- Operation: Air carrier
- Aircraft: N940N
- Make and model: Doug DC-9-32
- Registry model: [Doug DC-9-32](https://openairdocs.org/model/mcdonnell-douglas-dc-9-32) (OpenAirDocs)
- Aircraft serial: 47572
- System (JASC): [4990 · APU Oil System](https://openairdocs.org/jasc/4990)
- Part: B-Nut
- Condition: Loose
- Location: Apu Oil Line
- Stage of operation: CL
- 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/9719499918

## Discrepancy

SMOKE DETECTOR IN AFT RIGHT LAVATORY ACTIVATED AFTER TAKEOFF.  FLIGHT RETURNED TO DTW AND LANDED WITHOUT INCIDENT.  MAINTENANCE FOUND APU OIL TEST PORT LINE B-NUT LOOSE.  MAINTENANCE TIGHTENED NUT AND REPLACED BOTH WATER SEPARATOR BAGS AND SOCKS, OPERATIONAL CHECK NORMAL.

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