# SDR AALA202503240076

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: March 22, 2025
- Submitted: March 24, 2025
- Operation: Air carrier
- Aircraft: [N871NN](https://openairdocs.org/aircraft/N871NN), registered now
- Make and model: Boeing 737823
- Aircraft serial: 31127
- Aircraft time: 40,015 hours, 17,197 cycles
- System (JASC): [2120 · Air Distribution System](https://openairdocs.org/jasc/2120)
- Part: Air Filter
- Condition: Odor
- Location: Zone 100
- Stage of operation: TO
- 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/AALA202503240076

## Discrepancy

AIRCRAFT WAS GROUNDED: CREW REPORTED DURING TAKEOFF FOR WE EXPERIENCED A DIRTY MUSTY SMELL FOR APPROXIMATELY 5 MINUTES. REMOVED AND REPLACED BOTH LEFT (AALA202503242397) AND RIGHT (AALA202503240076) RECIRCULATION FAN FILTERS. PER MM 21-25-01. NO DEFECTS NOTED AT THIS TIME.

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