# SDR DXTA2025042203076

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: April 12, 2025
- Submitted: April 22, 2025
- Operation: Air carrier
- Aircraft: [N828QS](https://openairdocs.org/aircraft/N828QS), registered now
- Make and model: Textrn TEXTRON700
- Aircraft serial: 7000069
- Aircraft time: 3,212 hours, 1,912 cycles
- System (JASC): [4900 · Airborne Auxiliary Power Unit (APU) System](https://openairdocs.org/jasc/4900)
- Part: Apu
- Part number: 707201892
- Part serial: P413
- Condition: Odor
- Location: Zone 100
- Part time: 3,087 hours
- Stage of operation: TX
- How discovered: O
- Nature of condition: B
- Precautionary procedure: O
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/DXTA2025042203076

## Discrepancy

FOLLOWING APU START, DETECTED FAINT ODOR OF ATOMIZED OIL IN COCKPIT AND CABIN.  ODOR REMAINED DETECTABLE THROUGHOUT FLIGHT WITH APU OFF.  AFTER LANDING, WITH APU OPERATING AND ENGINES SHUT DOWN, ODOR REMAINED DETECTABLE.  ONCE APU BLEED WAS SELECTED OFF, ODOR FADED AWAY. CORRECTIVE ACTION: REMOVED APU P/N:70720189-2 S/N: P-413 AND INSTALLED CUSTOMER SUPPLIED RENTAL APU P/N:70720189-2 S/N:P-455. OPS CHECKS AND LEAK CHECKS GOOD. ALL WORK PERFORMED IN REF TO CE700 AMM 49-10-00.

---
OpenAirDocs.org is an independent research project of [Contrail Labs](https://contraillabs.com/). It is not affiliated with the FAA or the NTSB. Source documents are U.S. government works in the public domain.