# SDR ASAA201906049570

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: June 2, 2019
- Submitted: June 4, 2019
- Operation: Air carrier
- Aircraft: [N512AS](https://openairdocs.org/aircraft/N512AS), registered now
- Make and model: Boeing 737890
- Aircraft serial: 39043
- Aircraft time: 41,499 hours, 12,427 cycles
- System (JASC): [2160 · Cabin Temperature Control System](https://openairdocs.org/jasc/2160)
- Part: Valve
- Part number: 3989083
- Part serial: 11178
- Condition: Failed
- Location: Rt A/C Pack
- Part time: 41,499 hours, 12,427 cycles
- Stage of operation: NR
- 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/ASAA201906049570

## Discrepancy

AFT CABIN ZONE TEMP LIGHT ON MASTER CAUTION RECALL, RESETS WITH MASTER CAUTION. AFT CABIN TEMP DID NOT RESPOND TO MOVING CONTROLLER TO FULL HOT OR FULL COLD. GROUNDED - YES. REMOVED AND REPLACED V145 AFT CABIN TRIM MODULATOR VALVE REF B737-800 AMM TASK 21-61-21-000/400-801. OPS NORMAL, LEAK CHECK GOOD.

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