# SDR ASAA1158742

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: January 7, 2011
- Submitted: January 10, 2011
- Operation: Air carrier
- Aircraft: [N531AS](https://openairdocs.org/aircraft/N531AS), registered now
- Make and model: Boeing 737890
- Aircraft serial: 35199
- Aircraft time: 2,429 hours, 785 cycles
- System (JASC): [2160 · Cabin Temperature Control System](https://openairdocs.org/jasc/2160)
- Part: Filter
- Part number: 412A160041
- Condition: Dirty
- Location: Cockpit
- Stage of operation: TX
- How discovered: O
- Nature of condition: J
- Precautionary procedure: K
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/ASAA1158742

## Discrepancy

ZONE TEMP LIGHT (CONT CAB) ILLUMINATES ON "RECALL" GOES OUT WHEN MASTER CAUTION IS RESET.  BOTH ZONE TEMP CONTROLLERS FAIL "FLT DECK TEMP SENSOR" PERFORMED CLEANING OF CABIN (FLT DECK) SENSOR FILTER ASSEMBLY PER AMM REF 21 61 06 100 801.  ZONE TEMP LIGHT NO LONGER ILLUMINATES ON RECALL.

---
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.