# SDR ASAA2015100913415

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: October 9, 2015
- Submitted: October 12, 2015
- Operation: Air carrier
- Aircraft: [N596AS](https://openairdocs.org/aircraft/N596AS), registered now
- Make and model: Boeing 737890
- Aircraft serial: 35688
- Aircraft time: 28,478 hours, 8,794 cycles
- System (JASC): [2130 · Cabin Pressure Control System](https://openairdocs.org/jasc/2130)
- Part: Warning Light
- Condition: False Indication
- Stage of operation: CR
- 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/ASAA2015100913415

## Discrepancy

SEVERAL TIMES AT CRUISE ALTITUDES, INTERMITTENT MASTER CAUTION WITH AUTO FAIL AND ALTN LIGHT ILLUMINATED WITH NO CHANGE IN CABIN PRESSURE.  THE LIGHTS EXTINGUISHED WITHIN A FEW SECONDS.  ACFT GROUNDED.  ACC. FIM TASK 21-31, NR 801.  NO FAULTS LOGGED NR 1 OR NR 2 DCPC.  GROUND TEST OK, UNABLE TO DUPLICATE.

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