# SDR ASAA2020120533642

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: December 5, 2020
- Submitted: December 8, 2020
- Operation: Air carrier
- Aircraft: [N585AS](https://openairdocs.org/aircraft/N585AS), registered now
- Make and model: Boeing 737890
- Aircraft serial: 35683
- Aircraft time: 49,043 hours, 14,775 cycles
- System (JASC): [2150 · Cabin Cooling System](https://openairdocs.org/jasc/2150)
- Part: Control Valve
- Part number: 3989083
- Part serial: 16687
- Condition: Inoperative
- Location: Rt A/C Pack Temp
- Part time: 31,917 hours, 9,194 cycles
- Stage of operation: NR
- How discovered: V
- Nature of condition: M, J
- Precautionary procedure: O
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/ASAA2020120533642

## Discrepancy

UPON MASTER CAUTION RECALL, RT PACK LIGHT ILLUMINATES.  LIGHT EXTINGUISHES WITH MASTER CAUTION RESET.  GROUNDED-YES.  PERFORMED PACK ZONE TEMPERATURE BITE, PER B737-800 FIM 21-62 TASK 801 NR 2 CONTROLLER FAULTED.  RT TCV.  PERFORMED FIM 21-62 TASK 831 TO STEP F (3) TCV V141 HAS 115VAC.  REMOVED AND REPLACED RIGHT HAND PACK TEMP CONTROL VALVE, IAW B737-800 AMM 21-51-10.  OPERATIONS AND LEAK CHECK GOOD.

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