# SDR ASAA2014051407809

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: May 14, 2014
- Submitted: May 19, 2014
- Operation: Air carrier
- Aircraft: [N559AS](https://openairdocs.org/aircraft/N559AS), registered now
- Make and model: Boeing 737890
- Aircraft serial: 35178
- Aircraft time: 28,655 hours, 8,561 cycles
- System (JASC): [2160 · Cabin Temperature Control System](https://openairdocs.org/jasc/2160)
- Part: Regulator
- Condition: Malfunctioned
- Location: Cabin Temp
- Stage of operation: NR
- How discovered: O
- Nature of condition: O
- Precautionary procedure: O
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/ASAA2014051407809

## Discrepancy

COCKPIT CABIN TEMP CONTROLLER WOULD NOT PROVIDE WARM AIR IN FULL WARM POSITION.  COCKPIT REMAINED VERY COLD THROUGHOUT FLIGHT.  ACFT GROUNDED.  ACCOMPLISHED BITE CHECK OF BOTH PACK/ZONE TEMP CONTROLLERS.  BOTH PASS AIRFLOW ACROSS CONTROL CABIN TEMP SENSOR OK.  R & R TRIM AIR PRESSURE REGULATOR, TASK 21-62-01-400-801 POS 1-8. PERFORMED OPS AND LEAK CK, BOTH CHECKS WERE GOOD, IAW AMM 21-62-01-400-801, STEPS H-J.

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