# SDR ASAA2023010141324

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: January 1, 2023
- Submitted: January 3, 2023
- Operation: Air carrier
- Aircraft: [N535AS](https://openairdocs.org/aircraft/N535AS), registered now
- Make and model: Boeing 737890
- Aircraft serial: 35200
- Aircraft time: 43,083 hours, 12,354 cycles
- System (JASC): [2160 · Cabin Temperature Control System](https://openairdocs.org/jasc/2160)
- Part: Warning Message
- Condition: False Activation
- Location: Temp Controller
- 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/ASAA2023010141324

## Discrepancy

PRIMARY ZONE TEMP CONTROLLER INOP. GROUNDED - YES. PERFORMED B737-800 FIM 21-62 TASK 848, FOUND FAULT FLT DECK TRIM VALVE #2 ZONE TEMP CONTROLLER PERFORMED BITE TEST, FAULT CLEARS, REF FIM 21-62 TASK 833.

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