# SDR ASAA1058001

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: June 21, 2010
- Submitted: June 23, 2010
- Operation: Air carrier
- Aircraft: [N585AS](https://openairdocs.org/aircraft/N585AS), registered now
- Make and model: Boeing 737890
- Aircraft serial: 35683
- Aircraft time: 10,579 hours, 3,212 cycles
- System (JASC): [2160 · Cabin Temperature Control System](https://openairdocs.org/jasc/2160)
- Part: Control Valve
- Part number: 3989083
- Part serial: 11302
- Condition: Stuck
- Location: Ac Pack
- Part time: 5,179 hours, 1,664 cycles
- Stage of operation: TX
- How discovered: O
- Nature of condition: J
- Precautionary procedure: K
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/ASAA1058001

## Discrepancy

LEFT PACK LT/AIRCOND LT/ MASTER CAUTION ILLUMINATED DURING RECALL ON AFTER START CHECK.  FOUND ON ZONE TEMP CONT 1 TCV THIS PACK FAULT.  FOUND VALVE TO BE STUCK OPEN.  REPLACED LT TEMP CONTROL VALVE.  TEMP CONTROL VALVE TEST OPS CHECK GOOD REF AMM 21 51 10 400 801.  PACK/ZONE TEMP CONT 1 BITE PROCEDURE PERFORMED.  TCV FAULT CLEARED FIM TASK 21 62 00 810 801.  GROUND TESTS GOOD.

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