# SDR ASAA2022060738593

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: June 7, 2022
- Submitted: June 9, 2022
- Operation: Air carrier
- Aircraft: [N570AS](https://openairdocs.org/aircraft/N570AS), registered now
- Make and model: Boeing 737890
- Aircraft serial: 35185
- Aircraft time: 55,955 hours, 16,703 cycles
- System (JASC): [2150 · Cabin Cooling System](https://openairdocs.org/jasc/2150)
- Part: Modulator
- Part number: 3989083
- Part serial: 8891
- Condition: Faulty
- Location: Right Ecs Bay
- Part time: 57,186 hours, 17,282 cycles
- Stage of operation: IN
- How discovered: V
- Nature of condition: J
- Precautionary procedure: K
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/ASAA2022060738593

## Discrepancy

RIGHT PACK LIGHT ILLUMINATED IN FLIGHT AND WONT RESET. GROUNDED - YES. REMOVED AND REPLACED TRIM MODULATING VALVE (TCV) RH (THIS PACK) PER B737-800 AMM TASK 21-51-10. PZTC BITE TEST GOOD. LEAK CK GOOD. NO DEFECTS NOTED AT THIS TIME.+

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