# SDR ASAA2018032324022

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: March 23, 2018
- Submitted: March 26, 2018
- Operation: Air carrier
- Aircraft: [N464AS](https://openairdocs.org/aircraft/N464AS), registered now
- Make and model: Boeing 737990ER
- Aircraft serial: 40714
- Aircraft time: 15,570 hours, 5,093 cycles
- System (JASC): [2160 · Cabin Temperature Control System](https://openairdocs.org/jasc/2160)
- Part: Warning Light
- Condition: False Activation
- Location: Cockpit Temp
- Stage of operation: NR
- How discovered: O
- Nature of condition: N
- Precautionary procedure: O
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/ASAA2018032324022

## Discrepancy

CONTROL CABIN ZONE TEMP LIGHT ON DURING RECALL,  LIGHT OUT AFTER RESET.  ACFT GROUNDED. PERFORMED BITE TEST OF ZONE TEMP CONTROLLER IAW AMM 21-60-00, FLT DECK TRIM VALVE SOFT FAULT, RESET THE NR 2 PACK ZONE TEMP CONTROLLER, NO FAULTS NOTED. NO HISTORY LAST 60 DAYS.

---
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.