# SDR ASAA2013120596639

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: December 5, 2013
- Submitted: December 9, 2013
- Operation: Air carrier
- Aircraft: [N431AS](https://openairdocs.org/aircraft/N431AS), registered now
- Make and model: Boeing 737990ER
- Aircraft serial: 43255
- Aircraft time: 491 hours, 168 cycles
- System (JASC): [3460 · Flight Management Computing Hardware System](https://openairdocs.org/jasc/3460)
- Part: Module
- Condition: Malfunctioned
- Location: Display
- Stage of operation: NR
- How discovered: O
- Nature of condition: O
- Precautionary procedure: O
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/ASAA2013120596639

## Discrepancy

DIGITAL DISPLAYS, BOTH LAND ALT WINDOW AND CRUISE ALT WINDOW, ON CABIN PRESSURE CONTROLLER BLINK ON/OFF CONSTANTLY, ALSO WILL NOT DIM.  ACFT GROUNDED.  REMOVED P5-6 CABIN PRESSURE CONTROL MODULE REF TASK 21-31-02-000-801 AND INSPECTED ELECTRICAL CONNECTIONS.  ALL OK.  REINSTALLED P5-6 CABIN PRESSURE CONTROL MODULE REF TASK 21-31-02-400-801 AND RESET C/BS. MODULE LIGHTING DISPLAY NOW OPS NORMAL.  SUSPECT FAULTY CONTACT/CONNECTION REPAIRED DURING REMOVAL AND REPLACEMENT PROCESS.

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