# SDR ASAA2016062217122

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: June 22, 2016
- Submitted: June 24, 2016
- Operation: Air carrier
- Aircraft: [N508AS](https://openairdocs.org/aircraft/N508AS), registered now
- Make and model: Boeing 737890
- Aircraft serial: 35691
- Aircraft time: 30,470 hours, 9,252 cycles
- System (JASC): [2150 · Cabin Cooling System](https://openairdocs.org/jasc/2150)
- Part: Control Valve
- Part number: 3989085
- Part serial: 20258
- Condition: Failed
- Location: Ac Bay
- Part time: 9,343 hours, 2,966 cycles
- Stage of operation: DE
- 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/ASAA2016062217122

## Discrepancy

UPON RECALL DURING DESCENT, LT PACK LIGHT ON.  LIGHT RESET UPON MASTER CAUTION RESET, ACFT GROUNDED.  ACCOMPLISHED NR 1 PACK/ZONE TEMP CONTROLLER BITE, TCV LIGHT ILLUMINATED.  R & R LT PACK TEMP CONTROL VALVE, INSTALLATION TEST OK, REF AMM 21-51-00, 21-51-10.  ETOPS GROUND VERIFICATION SUCCESSFUL.

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