# SDR AALA202610062176

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: October 4, 2026
- Submitted: October 7, 2026
- Operation: Air carrier
- Aircraft: [N903NN](https://openairdocs.org/aircraft/N903NN), registered now
- Make and model: Boeing 737823
- Aircraft serial: 31153
- Aircraft time: 40,869 hours, 17,669 cycles
- System (JASC): [4990 · APU Oil System](https://openairdocs.org/jasc/4990)
- Part: Guide Vane
- Condition: Leaking
- Location: Apu
- Part time: 17,484 hours, 8,081 cycles
- Stage of operation: CR
- How discovered: O
- Nature of condition: K, B
- Precautionary procedure: A
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/AALA202610062176

## Discrepancy

AIRCRAFT WAS GROUNDED:   EMERGENCY DECLARED, AIRCRAFT LANDED WITHOUT INCIDENT.  DECESION WAS MADE TO DIVERT TO BNA,  FUMES IN CABIN.  ACCOMPLISHED JC 08L00021001 FOUND APU INLET GUIDE VANE LEAKING.  REMOVED AND REPLACED IAW AMM 49-42-12. NO ODOR NOTED. REF MIC 0149764.

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