# SDR ASAA1250975

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: January 20, 2012
- Submitted: January 23, 2012
- Operation: Air carrier
- Aircraft: [N534AS](https://openairdocs.org/aircraft/N534AS), registered now
- Make and model: Boeing 737890
- Aircraft serial: 35202
- Aircraft time: 3,995 hours, 1,247 cycles
- System (JASC): [2130 · Cabin Pressure Control System](https://openairdocs.org/jasc/2130)
- 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/ASAA1250975

## Discrepancy

PRESSURIZATION SELECTOR SWITCH IN AUTO WITH AUTO FAIL AND ALTN ANNUNCIATORS ILLUMINATED.  ACCOMPLISHED DIGITAL CABIN PRESSURE CONTROLLER BITE PROCEDURE PER M/M 21 31 00 810 801.  LOGGED "CONTRLR LRU FAIL MESSAGE.  PERFORMED SYSTEM TEST AND RESET FAULT MESSAGE.  SYSTEM BITE TESTS PASS.

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