# SDR 98ZZZM790

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: July 16, 1998
- Submitted: March 26, 2000
- Operation: Air carrier
- Aircraft: [N839JS](https://openairdocs.org/aircraft/N839JS), registered now
- Make and model: Bag JETSTM3101
- Aircraft serial: 748
- System (JASC): [2160 · Cabin Temperature Control System](https://openairdocs.org/jasc/2160)
- Part: Unit Control
- Part number: 218D4
- Condition: Failed
- Location: Ws 36
- Component: Graviner
- Stage of operation: CL
- Nature of condition: J
- Precautionary procedure: A
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/98ZZZM790

## Discrepancy

AIRCRAFT RETURNED TO FIELD DUE TO LEFT DUCT LIGHT ILLUMINATED.  THE SYSTEM WAS TROUBLESHOT AND THE DC CONTROL UNIT WAS DETERMINED TO HAVE FAILED.  THE UNIT WAS REPLACED AND A FUNCTIONAL CHECK PERFORMED WITH ALL INDICATIONS NORMAL.  (M)

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