# SDR ASAA2019031628624

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: March 16, 2019
- Submitted: March 20, 2019
- Operation: Air carrier
- Aircraft: [N472AS](https://openairdocs.org/aircraft/N472AS), registered now
- Make and model: Boeing 737990ER
- Aircraft serial: 60580
- Aircraft time: 15,650 hours, 5,113 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: O
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/ASAA2019031628624

## Discrepancy

CONT CAB ZONE TEMP WHEN PRESSING MASTER RECALL. RESETS WITH MASTER CAUTION. GROUNDED - YES. ACCOMPLISHED PACK/ZONE TEMP CONTROL BITE, FLIGHT DECK TRIM VALVE ILLUMINATED ON NR 2 PZTC (M1443) DURING BIT AND PREVIOUS FLT, GREEN GO LIGHT ILLUMINATED DURING VERIFY PHASE OF BITE. REF FIM 21-62 TASK 801. ACCOMPLISHED INITIAL EVALUATION STEP E. (1)(A). NO FURTHER ACTION NECESSARY, REF FIM 21-62 TASK 832.

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