# SDR AALA202508195038

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: August 15, 2025
- Submitted: August 19, 2025
- Operation: Air carrier
- Aircraft: [N841NN](https://openairdocs.org/aircraft/N841NN), registered now
- Make and model: Boeing 737823
- Aircraft serial: 30914
- Aircraft time: 45,229 hours, 19,343 cycles
- System (JASC): [2150 · Cabin Cooling System](https://openairdocs.org/jasc/2150)
- Part: A/C Pack
- Condition: Contaminated
- Location: Zone 100
- Stage of operation: CL
- How discovered: O
- Nature of condition: C, B
- Precautionary procedure: A
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/AALA202508195038

## Discrepancy

AIRCRAFT WAS GROUNDED: AN EMERGENCY WAS DECLARED DUE TO: AFTER TAKEOFF SMOKE REPORTED IN THE CABIN BY FLIGHT ATTENDANTS AND PASSENGER. AIRCRAFT AIR INTERRUPTED BACK TO AND LANDED SAFELY AT BZN. ACCOMPLISHMENT W/C 08L00021001. INSPECTED APU COMPARTMENT AND INLET FOR CONTAMINATION NONE NOTED. INSPECTED NUMBER 1 ENGINE INLET AND OGV'S WITH UV LIGHT FOR OIL LEAKS AND BIRD STRIKES. NONE NOTED. ACCOMPLISHED AMM 21-00-01. REMOVE OIL CONTAMINATION FROM AC AND PACK SYSTEM.

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