# SDR ASAA2015111513783

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: November 15, 2015
- Submitted: November 17, 2015
- Operation: Air carrier
- Aircraft: [N457AS](https://openairdocs.org/aircraft/N457AS), registered now
- Make and model: Boeing 737990ER
- Aircraft serial: 36355
- Aircraft time: 6,999 hours, 2,281 cycles
- System (JASC): [2160 · Cabin Temperature Control System](https://openairdocs.org/jasc/2160)
- Part: Control Valve
- Part number: 3989084
- Part serial: 20930
- Condition: Failed
- Location: A/C Bay
- Part time: 7,013 hours, 2,285 cycles
- Stage of operation: NR
- How discovered: 9
- Nature of condition: J
- Precautionary procedure: O
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/ASAA2015111513783

## Discrepancy

ON MASTER CAUTION RECALL, ZONE TEMP CONT CAB ILLUMINATED AND EXTINGUISHED ON RESET. ACFT GROUNDED.  ACCOMPLISHED PACK TEMP CONTROL BITE, FLT DECK TRIM VALVE LIGHT ILLUMINATED ON NR 2 PACK, ZONE TEMP CONTROLLER, REF FIM 21-62, TASK 801.  R & R CONTROL CABIN TRIM AIR MODULATING VALVE, OPS TEST NORMAL REF FIM 21-62, TASK 832 AND MM 21-61-21.

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