# SDR ASAA2015100313297

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: October 3, 2015
- Submitted: October 6, 2015
- Operation: Air carrier
- Aircraft: [N431AS](https://openairdocs.org/aircraft/N431AS), registered now
- Make and model: Boeing 737990ER
- Aircraft serial: 43255
- Aircraft time: 7,651 hours, 2,502 cycles
- System (JASC): [2160 · Cabin Temperature Control System](https://openairdocs.org/jasc/2160)
- Part: Sensor
- Part number: 6240181
- Condition: Failed
- Location: Cabin Temp
- Stage of operation: TX
- 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/ASAA2015100313297

## Discrepancy

FWD CABIN ZONE TEMP ILLUMINATES IN RECALL, EXTINGUISHES ON MASTER CAUTION RESET. ACFT GROUNDED.  ACCOMPLISHED TROUBLESHOOTING IAW FIM 21-62, TASK 843.  R & R FWD CABIN ZONE DUCT OVERHEAT SWITCH, S1076, REF AMM 21-61-05 AND FWD CABIN DUCT TEMP SENSOR, T533, REF AMM 21-61-04.  ACCOMPLISHED ZONE/TEMP BITE WITH NO FAULTS.  OPERATED TEMP CONTROL SYSTEM WITH NO FWD CABIN ZONE TEMP LIGHT ON RECALL.

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