# SDR AALA201806049003

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: May 30, 2018
- Submitted: June 4, 2018
- Operation: Air carrier
- Aircraft: [N781AN](https://openairdocs.org/aircraft/N781AN), registered now
- Make and model: Boeing 777223
- Aircraft serial: 29586
- Aircraft time: 73,021 hours, 8,836 cycles
- System (JASC): [2121 · Air Distribution Fan](https://openairdocs.org/jasc/2121)
- Part: Fan
- Part number: 4100945A
- Part serial: 0796
- Condition: Failed
- Location: Recirculation
- Stage of operation: NR
- How discovered: O
- Nature of condition: B
- Precautionary procedure: H
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/AALA201806049003

## Discrepancy

STATUS MESSAGE FOR THE  RECIRCULATION FAN,  NEAR THE R2 DOOR MADE A HIGH PITCH NOISE AND CAUSED A SMOKE ODOR.  NOISE AND SMOKE WENT AWAY WITH RECIRCULATION FANS SWITCHED OFF.  REPLACED FORWARD UPPER RECIRCULATION FAN IAW IAW 21-25-01.  AIRCRAFT WAS GROUNDED.

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