# SDR QMLA2013071813104

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: July 18, 2013
- Submitted: July 31, 2013
- Operation: Air carrier
- Aircraft: [N145DU](https://openairdocs.org/aircraft/N145DU), registered now
- Make and model: Bolkms BK117C2
- Aircraft serial: 9421
- Aircraft time: 599 hours, 1,583 cycles
- System (JASC): [2197 · Air Conditioning System Wiring](https://openairdocs.org/jasc/2197)
- Part: Relay
- Part number: M83536924L
- Condition: Failed
- Location: Aft Cabin Area
- Stage of operation: AA
- 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/QMLA2013071813104

## Discrepancy

DURING CRUISE FLIGHT THE CREW DETECTED A STRONG ELECTRICAL BURNING ODOR.  TURNED OFF A/C AND FAN AND THE ODOR SEEMED TO DISAPPEAR.  LANDED AT DESTINATION WITH NO FURTHER INCIDENT OR ODOR.  FOUND FRESH AIR VENT IN THA A/C INSTALLATION TO BE INOPERATIVE. CONCLUDED THE BURNED RELAY COULD HAVE CAUSED THE FAN MOTOR TO HEAT UP AND CAUSE THE ODOR.

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