# SDR DXTA2025050903420

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: May 9, 2025
- Submitted: May 12, 2025
- Operation: Air carrier
- Aircraft: [N820QS](https://openairdocs.org/aircraft/N820QS), registered now
- Make and model: Textrn TEXTRON700
- Aircraft serial: 7000057
- Aircraft time: 3,662 hours, 2,130 cycles
- System (JASC): [2120 · Air Distribution System](https://openairdocs.org/jasc/2120)
- Part: Duct
- Condition: Contaminated
- Location: Zone 200
- 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/DXTA2025050903420

## Discrepancy

EQUIPMENT COOLING: MOLDY/MUSTY/CHEMICALLY SMELL COMING FROM ALL VENTS WHILE THE APU IS RUNNING. CORRECTIVE ACTION: SEE STEP 3.2.2 ODOR DISAPPATED AFTER BURN OUT, NOTIFIED MCC AND AGREED TO SIGN OFF ODOR AND PLACE APU ON DEFERRAL DUE TO BORESCOPE RESULTS.

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