# SDR ASAA2013070895507

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: July 8, 2013
- Submitted: July 10, 2013
- Operation: Air carrier
- Aircraft: [N596AS](https://openairdocs.org/aircraft/N596AS), registered now
- Make and model: Boeing 737890
- Aircraft serial: 35688
- Aircraft time: 19,718 hours, 6,160 cycles
- System (JASC): [2160 · Cabin Temperature Control System](https://openairdocs.org/jasc/2160)
- Part: Control Valve
- Condition: Failed
- Stage of operation: TX
- 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/ASAA2013070895507

## Discrepancy

ZONE TEMP CONT ON WITH RECALL, RESETS WITH MASTER CAUTION.  ACFT GROUNDED.  ACCOMPLISHED PACK ZONE TEMP CONT BITE ON BOTH CONTS.  NR 1 SHOWS NO FAULTS, NR 2 SHOWS FAULT FOR FLT DECK CONT VALVE (V143).  CLEARED FAULT. CLEANED ALL 3 TEMP SENSOR FILTERS.  RAN BOTH PACKS FOR 75 MIN.  ACCOMP TEMP CONT & IND OPS TEST, TEST PASSES.  REACCOMP PACK/ ZONE TEMP CONT BITE, NO FAULTS ON BOTH CONTROLLERS.  GROUND VERIFICATION PASSES REF MM 21-61-06-100-801, 21-61-00-700-807-002, 21-00-00-800-803, & 21-61-00-700-806-002.

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