# SDR ASAA2015120214078

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: December 2, 2015
- Submitted: December 4, 2015
- Operation: Air carrier
- Aircraft: [N538AS](https://openairdocs.org/aircraft/N538AS), registered now
- Make and model: Boeing 737890
- Aircraft serial: 41188
- Aircraft time: 14,071 hours, 4,126 cycles
- System (JASC): [2160 · Cabin Temperature Control System](https://openairdocs.org/jasc/2160)
- Part: Modulating Valve
- Part number: 3989083
- Part serial: 17320
- Condition: Failed
- Location: Cabin Temp
- Part time: 14,073 hours, 4,127 cycles
- Stage of operation: NR
- How discovered: O
- Nature of condition: J
- Precautionary procedure: O
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/ASAA2015120214078

## Discrepancy

CONTROLLER CABIN ZONE TEMP LIGHT ON RECALL.  ACFT GROUNDED. R & R FLT DECK TRIM MODULATING VALVE IAW AMM 21-61-21-400-801.  LEAK CHECK GOOD IAW SAME REF ZONE TEMP FAULT NO LONGER ON RECALL.

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