# SDR ASAA2017030220001

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: March 2, 2017
- Submitted: March 6, 2017
- Operation: Air carrier
- Aircraft: [N579AS](https://openairdocs.org/aircraft/N579AS), registered now
- Make and model: Boeing 737890
- Aircraft serial: 35187
- Aircraft time: 37,969 hours, 11,319 cycles
- System (JASC): [2130 · Cabin Pressure Control System](https://openairdocs.org/jasc/2130)
- Part: Warning Light
- Condition: False Activation
- Location: Cabin Pressure
- Stage of operation: TX
- 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/ASAA2017030220001

## Discrepancy

DURING PREFLIGHT,  PRESSURIZATION PANEL HAD A AUTO FAIL AND ALTN LIGHT ON WITH SWITCH IN AUTO.  ACFT GROUNDED.  CYCLED THE SWITCH TO MANUAL AND BACK TO AUTO.  NO LIGHTS ILLUMINATED. NR 1 AND 2 PRESSURE CONTROLLERS BITE AND OPS NORMAL.  NO CURRENT FAULTS FIM 21-31 TASK 827 AND 21-31 TASK 801.

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