# SDR ASAA2019041108953

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: April 10, 2019
- Submitted: April 11, 2019
- Operation: Air carrier
- Aircraft: [N558AS](https://openairdocs.org/aircraft/N558AS), registered now
- Make and model: Boeing 737890
- Aircraft serial: 35177
- Aircraft time: 48,616 hours, 14,340 cycles
- System (JASC): [2150 · Cabin Cooling System](https://openairdocs.org/jasc/2150)
- Part: Control Valve
- Part number: 3989083
- Part serial: 10403
- Condition: Inoperative
- Location: Rt A/C Pack
- Part time: 42,167 hours, 12,841 cycles
- Stage of operation: NR
- How discovered: 9
- Nature of condition: J
- Precautionary procedure: O
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/ASAA2019041108953

## Discrepancy

RIGHT PACK CAUTION ILLUMINATES DURING RECALL CHECK. LIGHT RESETS. GROUNDED - YES. REMOVED AND REPLACED RIGHT PACK TCV VALVE REF B737-800 AMM 21-51-10. INSTALLATION AND LEAK CHECK GOOD. PERFORMED PACK/ZONE TEMP CONTROLLER BITE TEST REF AMM 21-61-00-700-806-002. NO FAULTS FOUND.

---
OpenAirDocs.org is an independent research project of [Contrail Labs](https://contraillabs.com/). It is not affiliated with the FAA or the NTSB. Source documents are U.S. government works in the public domain.