# SDR 2007UALA00660

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: March 2, 2007
- Submitted: March 13, 2007
- Operation: Air carrier
- Aircraft: [N653UA](https://openairdocs.org/aircraft/N653UA), registered now
- Make and model: Boeing 767322
- Aircraft serial: 25391
- Aircraft time: 62,849 hours, 10,347 cycles
- Engine: Pwa PW4060
- System (JASC): [2120 · Air Distribution System](https://openairdocs.org/jasc/2120)
- Part: Unknown
- Condition: Odor
- Location: Cabin
- 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/2007UALA00660

## Discrepancy

BURNING ODOR NOTICED IN CABIN BY CREW.  TROUBLE SHOOTING IDENTIFIED PROBLEM AS OVERHEATING OF FWD E & E COMPARTMENT COOLING FAN.  REPLACED FWD EXHAUST FAN AS PER MM 21-58-06. TESTED OKAY.  SUSPECT DIRT BUILD-UP CAUSED FAN TO DRAG & REQUIRED MORE CURRENT TO OVERCOME FRICTION.  LED TO OVERHEATED MOTOR.

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