# SDR ASAA2015061512094

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: June 15, 2015
- Submitted: June 19, 2015
- Operation: Air carrier
- Aircraft: [N468AS](https://openairdocs.org/aircraft/N468AS), registered now
- Make and model: Boeing 737990ER
- Aircraft serial: 41735
- Aircraft time: 3,505 hours, 1,178 cycles
- System (JASC): [2150 · Cabin Cooling System](https://openairdocs.org/jasc/2150)
- Part: Control Valve
- Part number: 3989084
- Part serial: 22109
- Condition: Faulted
- Location: Lt A/C Pack
- Part time: 3,498 hours, 1,175 cycles
- Stage of operation: DE
- 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/ASAA2015061512094

## Discrepancy

DURING DESCENT, THE LT PACK TEMP HIGH ILLUMINATED.  ACFT GROUNDED.  PERFORMED PACK ZONE TEMP CONTROLLER BITE READS TCV NR 1 CONTROLLER.  REPLACED TCV IAW MM 21-51-10.  CONTROLLER BITE MM 21-61-00.  LEAK CHECKED AND ALL PASSED.  ACFT GOOD FOR SERVICE.

---
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.