# SDR ASAA2022101040227

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: October 10, 2022
- Submitted: October 11, 2022
- Operation: Air carrier
- Aircraft: [N565AS](https://openairdocs.org/aircraft/N565AS), registered now
- Make and model: Boeing 737890
- Aircraft serial: 35181
- Aircraft time: 58,112 hours, 17,297 cycles
- System (JASC): [2160 · Cabin Temperature Control System](https://openairdocs.org/jasc/2160)
- Part: Modulating Valve
- Part number: UNKNOWN
- Condition: Warning Light
- Location: Unknown
- Stage of operation: NR
- How discovered: V
- Nature of condition: J
- Precautionary procedure: K
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/ASAA2022101040227

## Discrepancy

CONT CAB ZONE TEMP ILLUMINATED ON MASTER CAUTION RESET ON RECALL. GROUNDED - YES. ACCOMPLISHED TEMP CONTROL BITE CK ON # 1 AND # 2 CONTROLLER. # 1 CONTROLLER TEST OK NO FAULTS. # 2 CONTROLLER SHOW FAULT FLT DECK TRIM VALVE ABLE TO RESET RAN BITE CK AGAIN NO FAULTS NOTED. ON RECALL NO CAB ZONE TEMP LIGHT ILLUM. REF B737-800 AMM 21-61-00.

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