# SDR DXTA2015102906115

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: October 28, 2015
- Submitted: November 2, 2015
- Operation: Air carrier
- Aircraft: [N922QS](https://openairdocs.org/aircraft/N922QS), registered now
- Make and model: Cessna 750
- Registry model: [Cessna 750](https://openairdocs.org/model/cessna-750) (OpenAirDocs)
- Aircraft serial: 7500293
- Aircraft time: 6,794 hours, 4,132 cycles
- System (JASC): [4920 · APU Core Engine](https://openairdocs.org/jasc/4920)
- Part: Apu
- Part number: 38005761
- Part serial: P412
- Condition: Malfunctioned
- Location: Apu Bay
- Part time: 5,624 hours, 6,556 cycles
- Stage of operation: TX
- How discovered: O
- Nature of condition: B, P
- Precautionary procedure: O
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/DXTA2015102906115

## Discrepancy

AFTER ENGINE START AND WELL AFTER APU SHUTDOWN CABIN FILLED WITH A LIGHT FOG OF SMOKE.  REMOVED APU.  INSPECTED FIREWALL, MOUNTS, AND SUPPORT STRUCTURE.  NO DEFECTS FOUND.  INSTALLED REPAIRED APU IAW CE-750 M/M 49-10-00 AND HONEYWELL GTCP36-150CX MM 49-20-00.  OPS AND LEAK CHECK IS GOOD.  REMOVED P/N : 3800576-1 , REMOVED S/N : P-412, INSTALLED P/N : 3800576-1 , INSTALLED S/N : P-166.

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