# SDR ASAA2012112793384

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: November 27, 2012
- Submitted: December 4, 2012
- Operation: Air carrier
- Aircraft: [N566AS](https://openairdocs.org/aircraft/N566AS), registered now
- Make and model: Boeing 737890
- Aircraft serial: 35182
- Aircraft time: 22,749 hours, 6,986 cycles
- System (JASC): [2150 · Cabin Cooling System](https://openairdocs.org/jasc/2150)
- Part: Control Valve
- Part number: 3989083
- Part serial: 10948
- Condition: Malfunctioned
- Location: A/C Bay
- Part time: 16,234 hours, 5,144 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/ASAA2012112793384

## Discrepancy

LEFT PACK LIGHT ILLUMINATED ON RECALL, EXTINGUISHED ON MASTER CAUTION RESET.  VERIFIED TCV FAULT ON NR 1 ZONE TEMP CONTROLLER.  R & R LT PACK TEMP CONTROL VALVE.  REF MM 21-51-10-000-801 AND 21-51-10-400-801.  LEAK  & OPS CK GOOD. ACCOMP BITE TEST AND VERIFIED NO FAULTS LOGGED AT THIS TIME.

---
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.