# SDR ASAA2017112222671

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: November 22, 2017
- Submitted: November 27, 2017
- Operation: Air carrier
- Aircraft: [N433AS](https://openairdocs.org/aircraft/N433AS), registered now
- Make and model: Boeing 737990ER
- Aircraft serial: 41704
- Aircraft time: 16,285 hours, 5,333 cycles
- System (JASC): [2160 · Cabin Temperature Control System](https://openairdocs.org/jasc/2160)
- Part: Warning Light
- Condition: False Activation
- Location: Cabin 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/ASAA2017112222671

## Discrepancy

CONTROL CABIN ZONE LIGHT ILLUMINATED ON RECALL.   LIGHT RESETS WHEN RECALL IS PRESSED.  ACFT GROUNDED.  FOUND THE NR 2 TEMP CONTROLLER WITH FLT DECK TRIM VALVE FAULT LIGHT ON WHEN BIT SELECTED.  PERFORMED AMM 21-61-00-700-806-002, PACK/ZONE TEMP CONTROLLER BITE TEST. NO DEFECTS NOTED FAULTS LIGHT RESET. NO ZONE TEMP LIGHT ON RECALL. NO HISTORY LAST 30 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.