# SDR ASAA2015110713665

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: November 7, 2015
- Submitted: November 12, 2015
- Operation: Air carrier
- Aircraft: [N577AS](https://openairdocs.org/aircraft/N577AS), registered now
- Make and model: Boeing 737890
- Aircraft serial: 35186
- Aircraft time: 33,133 hours, 9,926 cycles
- System (JASC): [2160 · Cabin Temperature Control System](https://openairdocs.org/jasc/2160)
- Part: Control Valve
- Part number: 3989083
- Part serial: 8724
- Condition: Failed
- Location: A/C Bay
- Part time: 29,208 hours, 11,699 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/ASAA2015110713665

## Discrepancy

ZONE TEMP CONTROLLER CAB LT ILLUMINATED ON RECALL, ACFT GROUNDED.  R & R FLT DECK ZONE TRIM VALVE IAW AMM 21-61-21, OPS & LEAK CK NORMAL.  NO FAULTS ON EITHER PACK/ZONE TEMP CONTROLLER AFTER BITE AND COCKPIT ZONE TEMP CONTROLLER CAB ANNUNCIATION  REMAINS EXTINGUISHED W/ MASTER RECALL.

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