# SDR ASAA2022090939908

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: September 9, 2022
- Submitted: September 12, 2022
- Operation: Air carrier
- Aircraft: [N589AS](https://openairdocs.org/aircraft/N589AS), registered now
- Make and model: Boeing 737890
- Aircraft serial: 35686
- Aircraft time: 53,623 hours, 15,747 cycles
- System (JASC): [2150 · Cabin Cooling System](https://openairdocs.org/jasc/2150)
- Part: Control Valve
- Part number: 3989083
- Part serial: 2397
- Condition: Faulty
- Location: Left Ecs Bay
- Part time: 78,793 hours, 34,849 cycles
- Stage of operation: TX
- 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/ASAA2022090939908

## Discrepancy

AFTER ENGINE START LEFT PACK LIGHT ILLUMINATED UPON MASTER CAUTION RECALL. LIGHT EXTINGUISHED UPON MASTER CAUTION RESET.  GROUNDED - YES. REMOVED AND REPLACED LH TCV REF B737-800 AMM 21-51-10.

---
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.