# SDR ASAA2014020306761

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: February 3, 2014
- Submitted: February 7, 2014
- Operation: Air carrier
- Aircraft: [N583AS](https://openairdocs.org/aircraft/N583AS), registered now
- Make and model: Boeing 737890
- Aircraft serial: 35681
- Aircraft time: 24,820 hours, 7,359 cycles
- System (JASC): [2131 · Cabin Pressure Controller](https://openairdocs.org/jasc/2131)
- Part: Controller
- Part number: 71211997101AC
- Part serial: 0219584
- Condition: Loose
- Location: Cabin Pressure
- Part time: 40 hours, 10 cycles
- Stage of operation: TX
- How discovered: O
- Nature of condition: J
- Precautionary procedure: O
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/ASAA2014020306761

## Discrepancy

SEVERAL INTERMITTENT PRESSURE CONTROLLER AUTO FAIL/ALTN LIGHTS COME ON.  TWO SECONDS THEN WENT OUT.  ACFT GROUNDED.  PERFORMED FIM 21-31, TASK 827.  BITE CHECK PRESSURE CONTROLLER NR 1 & NR 2 IAW FIM 21-31, TASK 801. NO CURRENT FAULTS AND NO FAULT HISTORY FOR FLT LEG 01.  ALSO PERFORMED ADIRU NR 1 & NR 2 BITE CHECK IAW FIM 21-31 TASK 806. NO CURRENT FAULTS AND NO FAULT HISTORY.  PRESSURIZATION SYSTEM GROUND TEST REF AMM TASK 21-31-00-700-802. DURING TEST CONTROLLER NR 1 FAULTED.  TIGHTENED CONTROLLER NR 1 IN RACK AND PERFORMED OPS CHECK WAS GOOD. NO FAULTS FOR CONTROLLER NR 1 OR NR 2.

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