# SDR ASAA2018080125608

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: July 30, 2018
- Submitted: August 1, 2018
- Operation: Air carrier
- Aircraft: [N590AS](https://openairdocs.org/aircraft/N590AS), registered now
- Make and model: Boeing 737890
- Aircraft serial: 35687
- Aircraft time: 40,090 hours, 12,148 cycles
- System (JASC): [2130 · Cabin Pressure Control System](https://openairdocs.org/jasc/2130)
- Part: Warning System
- Condition: False Activation
- Location: Cockpit
- Stage of operation: AP
- 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/ASAA2018080125608

## Discrepancy

PRESSURIZATION CONTROL PANEL "AUTO FAIL" LIGHT ILLUMINATED ON SHORT FINAL APPROACH. GROUNDED - YES. VERIFIED DISCREPANCY. FOUND NR 1 CONTROLLER FAULTING LRU CODE 57. PERFORMED FIM 21-31 TASK 801 (DCPC) BITE PROCEDURE. NO ACTIVE FAULTS FOUND. SYS RESET. FAULT CLEARED. PERFORMED FIM 21-31 TASK 824 CABIN PRESSURE CONTROLLER FAIL - FAULT ISOLATION . NO NEW FAULTS LOGGED. PERFORMED AMM TASK 21-31-00-700-802 PRESSURIZATION SYSTEM GROUND TEST ON NR 1 CONTROLLER. ALL TESTS PASSED.

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