# SDR ASAA2014072708693

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: July 27, 2014
- Submitted: July 31, 2014
- Operation: Air carrier
- Aircraft: [N403AS](https://openairdocs.org/aircraft/N403AS), registered now
- Make and model: Boeing 737990ER
- Aircraft serial: 41730
- Aircraft time: 6,958 hours, 2,195 cycles
- System (JASC): [2150 · Cabin Cooling System](https://openairdocs.org/jasc/2150)
- Part: Control Valve
- Part number: 3989084
- Part serial: 9102
- Condition: Malfunctioned
- Location: Lt A/C Pack
- Part time: 27,955 hours, 8,513 cycles
- Stage of operation: NR
- 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/ASAA2014072708693

## Discrepancy

LEFT PACK LIGHT ILLUMINATED DURING MASTER CAUTION RECALL.  RESETS WITH MASTER CAUTION RESET.  ACFT GROUNDED.  REPLACED LT PACK TEMP CONTROL VALVE (V-139). PACK/ZONE TEMPERATURE CONTROLLER BITE TEST PASSES.  NO LEAKS NOTED. REF AMM 21-51-10/401 AND FIM 21-62/830.

---
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.