# SDR ASAA2022122241226

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: December 22, 2022
- Submitted: December 29, 2022
- Operation: Air carrier
- Aircraft: [N514AS](https://openairdocs.org/aircraft/N514AS), registered now
- Make and model: Boeing 737890
- Aircraft serial: 35193
- Aircraft time: 51,265 hours, 15,103 cycles
- System (JASC): [2150 · Cabin Cooling System](https://openairdocs.org/jasc/2150)
- Part: Modulating Valve
- Part number: 3989083
- Part serial: 3515
- Condition: Faulted
- Location: Rt Ecs
- Part time: 75,743 hours, 32,229 cycles
- Stage of operation: CL
- 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/ASAA2022122241226

## Discrepancy

DURING CLIMB NR 2 PACK LT ILLUMINATED. RAN QRH AND PACK LT ILLUMINATED 20 SECOND AFTER TRIM RESET. GROUNDED - YES. PERFORMED BITE CHECK ON RH PACK TEMPERATURE CONTROL NO MAINTENANCE MESSAGE FOUND. REMOVED AND REPLACED TEMPERATURE CONTROL VALVE PER B737-800 AMM 21-51-10. BIT CHECK AND OPS CHECK GOOD. ORIG SUBMISSION DATE:  12/27/2022

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