# SDR KCSA07027

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: March 24, 2007
- Submitted: March 26, 2007
- Operation: Air carrier
- Aircraft: [N715CK](https://openairdocs.org/aircraft/N715CK), registered now
- Make and model: Boeing 747209B
- Aircraft serial: 22447
- Aircraft time: 83,715 hours, 20,262 cycles
- System (JASC): [2121 · Air Distribution Fan](https://openairdocs.org/jasc/2121)
- Part: Fan
- Condition: Defective
- Location: Cockpit
- Stage of operation: CR
- 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/KCSA07027

## Discrepancy

LOUD RUMBLE DURING CRUISE ACCOMPANIED BY ACRID ODOR.  TURNED OFF FLIGHT DECK FAN.  RUMBLE IMMEDIATELY STOPPED, ODOR DISSIPATED IN APPROXIMATELY THREE MINUTES.

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