# SDR ASAA2023042643024

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: April 26, 2023
- Submitted: April 29, 2023
- Operation: Air carrier
- Aircraft: [N513AS](https://openairdocs.org/aircraft/N513AS), registered now
- Make and model: Boeing 737890
- Aircraft serial: 35192
- Aircraft time: 51,566 hours, 15,448 cycles
- System (JASC): [2150 · Cabin Cooling System](https://openairdocs.org/jasc/2150)
- Part: Modulating Valve
- Part number: 3989086
- Part serial: 36148
- Condition: Faulty
- Location: Right Ecs Bay
- Part time: 923 hours, 290 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/ASAA2023042643024

## Discrepancy

RIGHT PACK LIGHT ILLUMINATES ON MASTER CAUTION RECALL. LIGHT GOES OUT ON MASTER CAUTION RESET. GROUNDED - YES. MSG ACTIVE ON RECALL, PZTC-2 SHOWS THIS PACK TCV ON CURRENT BIT REF B737-800 FIM 21-62 TASK 831. REMOVED AND REPLACED R/H TEMP CONTROL VALVE REF B737-800 AMM 21-51-10. LEAK CHECK GOOD. OPS CHECK GOOD.

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