# SDR AALA202604289314

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: April 27, 2026
- Submitted: April 28, 2026
- Operation: Air carrier
- Aircraft: [N998NN](https://openairdocs.org/aircraft/N998NN), registered now
- Make and model: Boeing 737823
- Aircraft serial: 31250
- Aircraft time: 27,913 hours, 12,064 cycles
- System (JASC): [2121 · Air Distribution Fan](https://openairdocs.org/jasc/2121)
- Part: Fan
- Part number: 6454052
- Part serial: 10725
- Condition: Failed
- Location: Zone 100
- Part time: 14,612 hours, 7,036 cycles
- Stage of operation: CR
- 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/AALA202604289314

## Discrepancy

AIRCRAFT WAS GROUNDED: A WAXY PLASTIC LIKE BURNING SMELL WAS NOTICED THROUGHOUT THE AIRPLANE DURING DESCENT, AROUND 3000 FT. THE ODOR WAS DETECTED BOTH IN THE FLIGHT DECK AND IN THE CABIN. ACCOMPLISHED SOF T/S J/C 08L00021001. FOUND LEFT RECIRCULATION FAN INOPERATIVE. REMOVED AND REPLACED RECIRCULATION FAN. ACCOMPLISHED ENGINE HIGH POWER RUN UP, CHECKS GOOD NO ODOR.

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