# SDR ASAA2013072895691

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: July 28, 2013
- Submitted: July 30, 2013
- Operation: Air carrier
- Aircraft: [N593AS](https://openairdocs.org/aircraft/N593AS), registered now
- Make and model: Boeing 737890
- Aircraft serial: 35107
- Aircraft time: 20,689 hours, 6,462 cycles
- System (JASC): [2150 · Cabin Cooling System](https://openairdocs.org/jasc/2150)
- Part: Control Valve
- Condition: Malfunctioned
- Location: Lt A/C Pack
- Stage of operation: AP
- 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/ASAA2013072895691

## Discrepancy

LEFT PACK LIGHT ILLUMINATED ON FINAL.  MASTER CAUTION RESET WILL EXTINGUISH THE LIGHT.  ACFT GROUNDED.  PERFORMED FIM TASK 21-62-801 ON NR 1 CONTROLLER.  FOUND TCV FAULT.  RAN BITE TEST, FAULT CLEARED AND LIGHT NEVER ILLUMINATED.  RAN PACK NO FAULTS FOUND.  OPS NORMAL.

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