# SDR ASAA2019010127644

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: January 1, 2019
- Submitted: January 8, 2019
- Operation: Air carrier
- Aircraft: [N512AS](https://openairdocs.org/aircraft/N512AS), registered now
- Make and model: Boeing 737890
- Aircraft serial: 39043
- Aircraft time: 39,789 hours, 11,965 cycles
- System (JASC): [2160 · Cabin Temperature Control System](https://openairdocs.org/jasc/2160)
- Part: Warning System
- Condition: False Activation
- Location: Cockpit
- Stage of operation: TX
- 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/ASAA2019010127644

## Discrepancy

AFT ZONE TEMP ILLUMINATED ON MASTER RECALL DURING START CHECK LIST. GROUNDED - YES. ON DEFERRAL. ACCOMPLISHED PACK/ZONE TEMP CONTROLLER BITE AMM 21-60-00, NO FAULTS NOTED. GROUND VERIFICATION SUCCESSFUL PER AMM 21-61-21-400-801 AND SAME BITE.

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