# SDR ASAA2018110526709

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: November 3, 2018
- Submitted: November 6, 2018
- Operation: Air carrier
- Aircraft: [N531AS](https://openairdocs.org/aircraft/N531AS), registered now
- Make and model: Boeing 737890
- Aircraft serial: 35199
- Aircraft time: 33,019 hours, 9,784 cycles
- System (JASC): [2131 · Cabin Pressure Controller](https://openairdocs.org/jasc/2131)
- Part: Controller
- Condition: Malfunctioned
- Location: Cabin Pressure
- Stage of operation: NR
- How discovered: 9
- Nature of condition: O
- Precautionary procedure: O
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/ASAA2018110526709

## Discrepancy

CABIN PRESSURIZATION CONTROLLER CONTINUOUSLY BLINKS WHEN LIGHTS SWITCH IS IN DIM MODE. DIGITAL READOUT DOES NOT DIM EITHER. GROUNDED - YES. KNOWN ANOMALLY. PULLED & RESET 5 EA PRESS C/B'S. OPS CHECK PRESS SYS & IT'S PNL LIGHTING GOOD. REF B737--800 FIM 21-31 TASK 803.

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