# SDR ASAA2018120427212

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: December 4, 2018
- Submitted: December 6, 2018
- Operation: Air carrier
- Aircraft: [N472AS](https://openairdocs.org/aircraft/N472AS), registered now
- Make and model: Boeing 737990ER
- Aircraft serial: 60580
- Aircraft time: 14,641 hours, 4,808 cycles
- System (JASC): [2161 · Cabin Temperature Controller](https://openairdocs.org/jasc/2161)
- Part: Controller
- Condition: Faulted
- 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/ASAA2018120427212

## Discrepancy

ON TAXI OUT FWD CAB ZONE TEMP LIGHT ILLUMINATED, OUT WITH RESET. GROUNDED - YES. PERFORMED BITE TEST ON BOTH PACK TEMPERATURE CONTROLLER PER FIM 21-62 TASK 801 FOUND ZONE FAULT ON CONT NR 2, CLEARED ZONE SELECTOR FAULT ON NR 2 CONTROLLER.

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