# SDR ASAA2022032337759

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: March 23, 2022
- Submitted: March 25, 2022
- Operation: Air carrier
- Aircraft: [N512AS](https://openairdocs.org/aircraft/N512AS), registered now
- Make and model: Boeing 737890
- Aircraft serial: 39043
- Aircraft time: 48,936 hours, 14,431 cycles
- Engine: Ge CFM567B24
- System (JASC): [2150 · Cabin Cooling System](https://openairdocs.org/jasc/2150)
- Part: Valve
- Part number: 3989085
- Part serial: 22128
- Condition: Faulty
- Location: Right Ecs Bay
- Part time: 23,338 hours, 7,035 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/ASAA2022032337759

## Discrepancy

RIGHT PACK LIGHT ILLUMINATED ON MASTER CAUTION RECALL, LIGHT EXTINGUISHES WHEN MASTER CAUTION SYSTEM IS RESET. GROUNDED - YES. DURING BITE RH TEMP CONTROL VALVE FAULTED. REMOVED AND REPLACED RH TEMPERATURE CONTROL VALVE IAW B737-800 AMM 21-51-10-000-801 AND AMM 21-51-10-400-801, ETOPS GROUND VERIFICATION CHECK GOOD IAW AMM 21-61-00-700-806-002.

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