# SDR 04052424

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: February 21, 2004
- Submitted: February 24, 2004
- Operation: Air carrier
- Aircraft: [N424FJ](https://openairdocs.org/aircraft/N424FJ), registered now
- Make and model: Dorner DO328300
- Aircraft serial: 3185
- Aircraft time: 5,919 hours, 6,361 cycles
- System (JASC): [4920 · APU Core Engine](https://openairdocs.org/jasc/4920)
- Part: Apu
- Condition: Leaking
- Location: Apu Bay
- Stage of operation: UK
- How discovered: O
- Nature of condition: B, J
- Precautionary procedure: O
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/04052424

## Discrepancy

DURING AIRCRAFT OPERATION THE CREW RECEIVED A LAVATORY SMOKE MESSAGE.  THE APU LOAD CONTROL VALVE WAS FOUND TO HAVE OIL RESIDUE CAUSING THE SMOKE.  APU WAS DEFERRED FOR PARTS AND LATER REPAIRED.

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