# SDR ASAA2017062221155

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: June 22, 2017
- Submitted: June 23, 2017
- Operation: Air carrier
- Aircraft: [N564AS](https://openairdocs.org/aircraft/N564AS), registered now
- Make and model: Boeing 737890
- Aircraft serial: 35103
- Aircraft time: 40,873 hours, 12,397 cycles
- System (JASC): [2150 · Cabin Cooling System](https://openairdocs.org/jasc/2150)
- Part: Control Valve
- Part number: 3989085
- Part serial: 2545
- Condition: Failed
- Location: Rt A/C Pack
- Part time: 67,872 hours, 31,232 cycles
- Stage of operation: NR
- How discovered: V
- Nature of condition: J
- Precautionary procedure: O
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/ASAA2017062221155

## Discrepancy

RIGHT PACK LIGHT ILLUMINATED DURING MASTER CAUTION RECALL, EXTINGUISHED WHEN RESET.  ACFT GROUNDED.  RT PACK TCV FAILED BITE TEST IAW AMM 21-61-00-700-806-002 ON NR 2 CONTROLLER.  REMOVED AND REPLACED THE RT PACK TCV IAW AMM 21-51-10. LEAK CHECKED AND GROUND VERIFICATION TESTED GOOD.

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