# SDR AALA202412033548

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: December 2, 2024
- Submitted: December 3, 2024
- Operation: Air carrier
- Aircraft: [N826NN](https://openairdocs.org/aircraft/N826NN), registered now
- Make and model: Boeing 737823
- Aircraft serial: 31089
- Aircraft time: 43,538 hours, 18,524 cycles
- System (JASC): [2120 · Air Distribution System](https://openairdocs.org/jasc/2120)
- Part: Air Filter
- Condition: Odor
- Location: Zone 100
- Stage of operation: NR
- 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/AALA202412033548

## Discrepancy

AIRCRAFT WAS GROUNDED: COMPLY WITH TASK CARD 08L00021001 B737NG SMOKE ODOR FUMES INITIAL TROUBLESHOOTING BEFORE FURTHER FLIGHT. ACCOMPLISHED TASK CARF08L00021. FOUND LEFT HAND RECIRCULATION FAN FINS MOTOR WITH BURNING SMELL. REMOVED AND REPLACED LEFT-HAND RECIRCULATION FAN (AALA202412032693), PER AMM 21-25-02. REMOVED AND REPLACED LEFT-HAND (AALA202412033548) AND RIGHT-HAND (AALA202412039697) RECIRCULATION FILTER, PER AMM 21-25-01. PERFORMED RECIRCULATION SYSTEM TEST, PER AMM 21-25-01. NO BURNING SMELLS IN THE CABIN OPERTIONAL CHECK GOOD.

---
OpenAirDocs.org is an independent research project of [Contrail Labs](https://contraillabs.com/). It is not affiliated with the FAA or the NTSB. Source documents are U.S. government works in the public domain.