# SDR ASAA2022122541257

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: December 25, 2022
- Submitted: December 28, 2022
- Operation: Air carrier
- Aircraft: [N562AS](https://openairdocs.org/aircraft/N562AS), registered now
- Make and model: Boeing 737890
- Aircraft serial: 35091
- Aircraft time: 59,130 hours, 17,421 cycles
- System (JASC): [2160 · Cabin Temperature Control System](https://openairdocs.org/jasc/2160)
- Part: Warning Light
- Condition: False Activation
- Location: Master Caution
- Stage of operation: NR
- How discovered: 9
- Nature of condition: N
- Precautionary procedure: O
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/ASAA2022122541257

## Discrepancy

ON RECALL ZONE TEMP ILLUMINATED RESETS WITH PUSH OF MASTER CAUTION. GROUNDED - YES. PERFORMED PACK TEMP CONTROL BITE PROCEDURE PER B737-800 FIM 21-62 TASK 801. FOUND TRIM VALVE RED LIGHT UNDER PREV FLT ON TEMP CONTROLLER. PRESSED VERIFY SWITCH ON CONTROLLER GREEN GO LIGHT ILLUMINATED INDICATING NO PRESENT FAULTS.

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