# SDR ASAA2014052107890

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: May 21, 2014
- Submitted: May 28, 2014
- Operation: Air carrier
- Aircraft: [N534AS](https://openairdocs.org/aircraft/N534AS), registered now
- Make and model: Boeing 737890
- Aircraft serial: 35202
- Aircraft time: 13,471 hours, 3,937 cycles
- System (JASC): [2150 · Cabin Cooling System](https://openairdocs.org/jasc/2150)
- Part: Control Valve
- Part number: 3989083
- Part serial: 14813
- Condition: Malfunctioned
- Location: Lt A/C Pack
- Part time: 11,945 hours, 3,530 cycles
- Stage of operation: TX
- How discovered: O
- Nature of condition: J
- Precautionary procedure: O
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/ASAA2014052107890

## Discrepancy

LEFT PACK LIGHT ON RECALL EXTINGUISHES WITH MASTER CAUTION.  ACFT GROUNDED.  REPLACED LT TEMP CONTROL VALVE.  OPS CHECKED NORMAL, NO LEAKS NOTED, IAW 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.