# SDR ASAA2023100745487

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: October 7, 2023
- Submitted: October 9, 2023
- Operation: Air carrier
- Aircraft: [N579AS](https://openairdocs.org/aircraft/N579AS), registered now
- Make and model: Boeing 737890
- Aircraft serial: 35187
- Aircraft time: 59,871 hours, 17,691 cycles
- System (JASC): [2160 · Cabin Temperature Control System](https://openairdocs.org/jasc/2160)
- Part: Unknown
- Part number: UNKNOWN
- Condition: Unknown
- Location: Unknown
- Stage of operation: NR
- How discovered: O
- Nature of condition: O
- Precautionary procedure: K
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/ASAA2023100745487

## Discrepancy

COCKPIT TEMP SELECTOR (CONTROL CABIN) DIFFICULT TO CONTROL TEMP AT ALTITUDE, SEEMS TO PROVIDE COLDER TEMPS VS PROVIDING HEAT WHEN ADJUSTING TEMP. GROUNDED - YES. BITE PACK TEMPERATURE CONTROLLER AND NO FAULT FOUND. REF B737-800 FIM 21-62-00-810-801. REMOVED AND REPLACED CABIN TEMPERATURE SENSOR FILTERS REF B737-800 AMM 21-61-06-400-801. SUPPLY CONDITIONED AIR TO CONTROL CABIN WITH BOTH PACK AND CABIN TEMP IS COTROLLABLE REF FIM 21-62 TASK 905.

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