# SDR ASAA2016031615963

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: March 16, 2016
- Submitted: March 21, 2016
- Operation: Air carrier
- Aircraft: [N508AS](https://openairdocs.org/aircraft/N508AS), registered now
- Make and model: Boeing 737890
- Aircraft serial: 35691
- Aircraft time: 29,396 hours, 8,951 cycles
- System (JASC): [2160 · Cabin Temperature Control System](https://openairdocs.org/jasc/2160)
- Part: Valve
- Part number: 3989085
- Part serial: 20543
- Condition: Failed
- Location: Cabin Temp
- Part time: 8,915 hours, 2,871 cycles
- 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/ASAA2016031615963

## Discrepancy

CONTROL CABIN ZONE TEMP LIGHT ILLUMINATES DURING RECALL.  LIGHT EXTINGUISHES WITH MASTER CAUTION RESET.  ACFT GROUNDED. R & R CONTROL CABIN TRIM MOD VALVE V143 IAW AMM 21-61-21/401. NR 1 AND NR 2 ZONE TEMP CONTROLLER BITE TESTED GOOD.  VALVE LEAKS CHECKED GOOD.  BOTH PACKS OPS CHECKED NORMAL.

---
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.