# SDR ASAA2023031942425

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: March 19, 2023
- Submitted: March 21, 2023
- Operation: Air carrier
- Aircraft: [N517AS](https://openairdocs.org/aircraft/N517AS), registered now
- Make and model: Boeing 737890
- Aircraft serial: 35197
- Aircraft time: 51,235 hours, 14,926 cycles
- System (JASC): [2160 · Cabin Temperature Control System](https://openairdocs.org/jasc/2160)
- Part: Sensor
- Part number: 6240181
- Condition: Faulty
- Location: Flight Deck
- 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/ASAA2023031942425

## Discrepancy

CONT CAB TEMP CONTROL FAULT ON MASTER CAUTION RECALL. GROUNDED - YES. C/W TECH SERVICE, REF B737-800 FIM 21-62 TASK 801, PERFORMED BITE TEST AND FOUND TRIM VALVE/FLT DECK FAULT. REMOVED AND REPLACE FLIGHT DECK TEMP SENSOR AND FILTER PRECAUTIONARY REF B737-800 AMM 21-61-10/AMM 21-61-06. INSPECTED EXHAUST BYPASS CHECK VALVE OPS CHECK GOOD NO DEFECTS FOUND.

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