# SDR ASAA2020040132583

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: March 29, 2020
- Submitted: April 1, 2020
- Operation: Air carrier
- Aircraft: [N560AS](https://openairdocs.org/aircraft/N560AS), registered now
- Make and model: Boeing 737890
- Aircraft serial: 35179
- Aircraft time: 51,717 hours, 15,425 cycles
- System (JASC): [2160 · Cabin Temperature Control System](https://openairdocs.org/jasc/2160)
- Part: Warning System
- Condition: False Activation
- Location: Cockpit
- Stage of operation: NR
- How discovered: O
- Nature of condition: N
- Precautionary procedure: K
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/ASAA2020040132583

## Discrepancy

UPON ANNUNCIATOR RECALL, CONT CAB ZONE TEMP ILLUMINATED. LIGHT EXTINGUISHES WHEN MASTER CAUTION SYSTEM IS RESET. GROUNDED - YES. PERFORMED PACK TEMP CONTROLLLER 1&2 BITE IAW B737-800 FIM 21-62 TASK 801. FOUND CONTROLLER 2 BIT, AND PREV "FLIGHT DECK TRIM VALVE" FAULT. NO FAULT ON VERIFY.

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