# SDR ASAA2020020522080

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: February 2, 2020
- Submitted: February 6, 2020
- Operation: Air carrier
- Aircraft: [N584AS](https://openairdocs.org/aircraft/N584AS), registered now
- Make and model: Boeing 737890
- Aircraft serial: 35682
- Aircraft time: 47,240 hours, 13,981 cycles
- System (JASC): [2150 · Cabin Cooling System](https://openairdocs.org/jasc/2150)
- Part: Control Valve
- Part number: 3989085
- Part serial: 27564
- Condition: Inoperative
- Location: Lt A/C Pack
- Part time: 11,230 hours, 3,609 cycles
- 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/ASAA2020020522080

## Discrepancy

LEFT PACK LIGHT ILLUMINATES OM MC RECALL. RESETS W/MC RESET. GROUNDED - YES. BITE OF M1442 ZONE TEMP CONTROLLER #1 FAULTS "TCV THIS PACK" REF B737-800 FIM 21-62 TASK 830. REPLACED TCV V139. INSTALLATION TEST PASSES, NO LEAKS NOTED REF B737-800 AMM 21-51-10-400-801.

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