# SDR AALA202610238257

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: October 21, 2026
- Submitted: October 23, 2026
- Operation: Air carrier
- Aircraft: [N105UW](https://openairdocs.org/aircraft/N105UW), registered now
- Make and model: Airbus A320-214
- Registry model: [Airbus A320-214](https://openairdocs.org/model/airbus-a320-214) (OpenAirDocs)
- Aircraft serial: 868
- Aircraft time: 71,572 hours, 41,859 cycles
- System (JASC): [4920 · APU Core Engine](https://openairdocs.org/jasc/4920)
- Part: Apu
- Condition: Odor
- Location: Zone 300
- Stage of operation: DE
- 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/AALA202610238257

## Discrepancy

AIRCRAFT WAS GROUNDED: AIR CONDITIONING ODOR NOTED ON GROUND AFTER FIRST ENGINE START WITH BLEED SUPPLIED BY APU. MUSTY/MECHANICAL/SEWER SMELL DETECTEDPRIMARILY ON THE FLIGHT DECK. ODOR SEEMED TO DISSIPATE AFTER SECOND ENGINE START, BUT DETECTED AGAIN ON DESCENT, BOTH ON FLIGHTDECK AND MID CABIN. NO IRRITATION OF EYES OR AIRWAYS WAS NOTED. (OPEN)

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