# SDR QMLA2020072020036

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: July 17, 2020
- Submitted: July 20, 2020
- Operation: Air carrier
- Aircraft: [N508AM](https://openairdocs.org/aircraft/N508AM), registered now
- Make and model: Snias AS350B3
- Aircraft serial: 4682
- Aircraft time: 5,124 hours, 14,280 cycles
- System (JASC): [2100 · Air Conditioning System](https://openairdocs.org/jasc/2100)
- Part: Wire
- Condition: Broken
- Location: Pressure Switch
- Component: Pressure Switch, Aircom
- Component part number: ES571781
- Stage of operation: NR
- How discovered: 9
- Nature of condition: B
- Precautionary procedure: O
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/QMLA2020072020036

## Discrepancy

RETURNED TO BASE DUE TO A BURNING, CHEMICAL ODOR IN THE CABIN.  THE MECHANIC PERFORMED A VISUAL INSPECTION, AND FOUND A BROKEN WIRE ON THE AC SYSTEM HI/LO PRESSURE SWITCH.  CORRECTED THE DISCREPANCY AND HAD THE PILOT PERFORM A 30 MINUTE PENALTY RUN WITH NO DEFECTS NOTED. THE AIRCRAFT WAS RETURNED TO SERVICE AT THIS TIME.

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