# SDR ASAA2013071495602

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: July 14, 2013
- Submitted: July 16, 2013
- Operation: Air carrier
- Aircraft: [N508AS](https://openairdocs.org/aircraft/N508AS), registered now
- Make and model: Boeing 737890
- Aircraft serial: 35691
- Aircraft time: 19,035 hours, 5,945 cycles
- System (JASC): [2150 · Cabin Cooling System](https://openairdocs.org/jasc/2150)
- Part: Control Valve
- Condition: Faulted
- Location: Lt A/C Pack
- 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/ASAA2013071495602

## Discrepancy

ON RECALL A/C WITH LT PACK DISPLAYED ON A/C PANEL, RESETS WHEN PRESS MASTER CAUTION BUTTON.  ACFT GROUNDED.  ACCOMPLISHED BITE TEST OF THE PACK/ZONE TEMP CONTROLLERS. FOUND TCV FAULT ON THE NR 1 CONTROLLER.  RESET FAULT, RAN AIR CONDITIONING PACKS. SYSTEM OPS NORMAL. GROUND VERIFICATION GOOD REF FIM 21-62, TASK 801.

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