# SDR ASAA2017041420450

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: April 14, 2017
- Submitted: April 17, 2017
- Operation: Air carrier
- Aircraft: [N538AS](https://openairdocs.org/aircraft/N538AS), registered now
- Make and model: Boeing 737890
- Aircraft serial: 41188
- Aircraft time: 19,406 hours, 5,644 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: NR
- 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/ASAA2017041420450

## Discrepancy

LEFT PACK LIGHT WOULD NOT RESET.  ACFT GROUNDED. PERFORMED LEFT PACK CONTROLLER BITE IAW FIM 21-62 TASK 801, TCV LIGHT ILLUMINATED AND WILL NOT RESET. TEMP CONTROL VALVE REMOVED AND REPLACED IAW AMM 21-51-10-000-801, AND 21-51-10-400-801. GROUND VERIFICATION CHECKED GOOD.

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