# SDR ASAA2019022738339

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: February 23, 2019
- Submitted: March 1, 2019
- Operation: Air carrier
- Aircraft: [N512AS](https://openairdocs.org/aircraft/N512AS), registered now
- Make and model: Boeing 737890
- Aircraft serial: 39043
- Aircraft time: 40,329 hours, 12,125 cycles
- System (JASC): [2150 · Cabin Cooling System](https://openairdocs.org/jasc/2150)
- Part: Control Valve
- Part number: 3989085
- Part serial: 21485
- Condition: Failed
- Location: Rt A/C Pack
- Part time: 14,714 hours, 5,139 cycles
- Stage of operation: TX
- 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/ASAA2019022738339

## Discrepancy

PACK LIGHT ILLUMINATED AFTER START EXTINGUISHED AFTER PUSHING MASTER CAUTION RECALL, WILL RESET WITH MASTER CAUTION. GROUNDED - YES. REMOVED AND REPLACED #2 TCV (V141) REF B737-800 AMM 21-61-21/401 OPS CHECK GOOD REF B737-800 FIM 21-62 TASK 801 NO DEFECTS NOTED.

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