# SDR ASAA1159563

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: April 30, 2011
- Submitted: May 2, 2011
- Operation: Air carrier
- Aircraft: [N594AS](https://openairdocs.org/aircraft/N594AS), registered now
- Make and model: Boeing 737890
- Aircraft serial: 35191
- Aircraft time: 11,765 hours, 3,720 cycles
- System (JASC): [2150 · Cabin Cooling System](https://openairdocs.org/jasc/2150)
- Part: Valve
- Part number: 3989083
- Part serial: 0624
- Condition: Failed
- Location: A/C Bay
- Part time: 11,775 hours, 3,725 cycles
- Stage of operation: TX
- How discovered: O
- Nature of condition: J
- Precautionary procedure: K
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/ASAA1159563

## Discrepancy

LEFT PACK LIGHT ON AFTER START OUT WITH MASTER CAUTION RESET.  LEFT PACK/ZONE TEMP CONTROLLER FAULTED TCV THIS PACK.  REPLACED LEFT TCV V139 REF MM 21 51 10.  GROUND VERIFICATION TEST NORMAL REF MM 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.