# SDR ASAA2017041420449

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: April 14, 2017
- Submitted: April 17, 2017
- Operation: Air carrier
- Aircraft: [N532AS](https://openairdocs.org/aircraft/N532AS), registered now
- Make and model: Boeing 737890
- Aircraft serial: 36346
- Aircraft time: 26,692 hours, 7,965 cycles
- System (JASC): [2150 · Cabin Cooling System](https://openairdocs.org/jasc/2150)
- Part: Control Valve
- Condition: Faulted
- 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/ASAA2017041420449

## Discrepancy

ON RECALL,  NR 2 PACK LIGHT ILLUMINATED.  LIGHT RESETS WITH MASTER CAUTION.  ACFT GROUNDED. BITE OF NR 2 ZONE TEMP CONTROLLER SHOWS TCV FAULT. FAULT CLEARS AND BITE TESTED GOOD IAW AMM TASK 21-61-20-400-801. GROUND VERIFICATION TEST GOOD.

---
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.