# SDR AALA2019042329004

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: April 21, 2019
- Submitted: May 3, 2019
- Operation: Air carrier
- Aircraft: [N775AN](https://openairdocs.org/aircraft/N775AN), registered now
- Make and model: Boeing 777223
- Aircraft serial: 29584
- Aircraft time: 82,029 hours, 9,930 cycles
- System (JASC): [2121 · Air Distribution Fan](https://openairdocs.org/jasc/2121)
- Part: Fan
- Part number: 4100945A
- Part serial: 0551
- Condition: Failed
- Location: Recirculation
- Stage of operation: NR
- How discovered: O
- Nature of condition: J, B
- Precautionary procedure: H
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/AALA2019042329004

## Discrepancy

AIRCRAFT WAS NOT GROUNDED: RATTLING NOISE ABOVE ROW 26, ACCOMPANIED BY RECIRCULATION FAN STATUS MESSAGE AND ELECTRICAL SMELL. TURNED UPPER RECIRCULATION FANS OFF AND BURNING SMELL DISAPATED AND RATTLING NOISE STOPPED. ***SUPPLEMENTAL INFORMATION: MAINTENANCE INSTALLED SERVICEABLE AFT R/H RECIRC FAN IAW 21-25-01.

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