# SDR AALA202302285693

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: February 27, 2023
- Submitted: February 28, 2023
- Operation: Air carrier
- Aircraft: [N783AN](https://openairdocs.org/aircraft/N783AN), registered now
- Make and model: Boeing 777223
- Aircraft serial: 30004
- Aircraft time: 89,445 hours, 11,055 cycles
- System (JASC): [2121 · Air Distribution Fan](https://openairdocs.org/jasc/2121)
- Part: Fan
- Part number: 4100945B
- Condition: Overheated
- Location: Zone 200 - Fuse
- Stage of operation: UK
- How discovered: V
- Nature of condition: J
- Precautionary procedure: O
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/AALA202302285693

## Discrepancy

AIRCRAFT WAS GROUNDED: RECIRCULATION FAN STATUS MESSAGE. ELECTRIC BURNING SMELL IN MAIN CABIN. RECIRCULATION FANS TURNED OFF, SMELL DISSIPATED. MAINTENANCE FOUND AFT UPPER RECIRCULATION FAN OVERHEAT FAULT CODE 21-24500. REPLACED RECIRCULATION FAN PER AMM 21-25-01. ACCOMPLISHED SATISFACTORY OPERATIONAL CHECK.

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