# SDR ASAA2018062025138

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: June 20, 2018
- Submitted: June 21, 2018
- Operation: Air carrier
- Aircraft: [N506AS](https://openairdocs.org/aircraft/N506AS), registered now
- Make and model: Boeing 737890
- Aircraft serial: 35690
- Aircraft time: 38,161 hours, 11,709 cycles
- System (JASC): [2160 · Cabin Temperature Control System](https://openairdocs.org/jasc/2160)
- Part: Valve
- Condition: Faulted
- Location: Cockpit Temp
- 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/ASAA2018062025138

## Discrepancy

CONTROL CABINE ZONE TEMP LIGHT ILLUMINATED ON RECALL,  CLEARS WITH MASTER CAUTION RESET.  ACFT GROUNDED.  ACCOMPLISHED PZTC BITE ON BOTH CONTROLLERS IAW FIM 21-62, TASK 801.  ON NR 2 CONTROLLER, FOUND FLT DECK TRIM VALVE FAULT FOR PREVIOUS FLIGHT. RESET SUCCESSFUL AND VERIFY PORTION OF BITE PASSED MULTIPLE TIMES IAW FIM 21-62, TASK 801. OPS CHECKED 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.