# SDR ASAA12511537

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: May 10, 2012
- Submitted: May 14, 2012
- Operation: Air carrier
- Aircraft: [N535AS](https://openairdocs.org/aircraft/N535AS), registered now
- Make and model: Boeing 737890
- Aircraft serial: 35200
- Aircraft time: 4,984 hours, 1,508 cycles
- Engine: Cfmint CFM567B273
- System (JASC): [2131 · Cabin Pressure Controller](https://openairdocs.org/jasc/2131)
- Part: Controller
- Condition: Faulted
- Location: Nr 2
- Stage of operation: TX
- How discovered: 9
- Nature of condition: J
- Precautionary procedure: O
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/ASAA12511537

## Discrepancy

AUTO PRESSURIZATION SELECTOR KNOB IN AUTO POSITION AND "AUTO FAIL" AND "ALTN" LIGHTS ILLUMINATED.  ACFT GROUNDED.  FOUND NR 2 PRESSURE CONTROLLER HAD DATA INTERUPT FAULT 041.  FAULT RESET, OK REF FIM 21-31 TASK 824.  NR 1 AND NR 2 PRESSURE CONTROLLERS BITE NORMAL.  NO EXISTING FAULTS.  GROUND VERIFICATION SUCCESSFUL. OK FOR SERVICE.

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