# SDR ASAA2020102533404

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: October 25, 2020
- Submitted: October 26, 2020
- Operation: Air carrier
- Aircraft: [N494AS](https://openairdocs.org/aircraft/N494AS), registered now
- Make and model: Boeing 737990ER
- Aircraft serial: 41729
- Aircraft time: 17,652 hours, 5,515 cycles
- System (JASC): [2130 · Cabin Pressure Control System](https://openairdocs.org/jasc/2130)
- Part: Warning Light
- Condition: False Activation
- Location: Cabin Pressure
- Stage of operation: LD
- How discovered: O
- Nature of condition: N
- Precautionary procedure: O
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/ASAA2020102533404

## Discrepancy

PRESSURIZATION AUTO FAIL LAMP ILLUMINATED AFTER LANDING.  GROUNDED-YES.   VERIFIED FAULT, NR 1 PRESSURE CONTROLLER SHOWS FAULT, MESSAGE OFV LRU FAIL,  CLEARED FAULT.  ACCOMPLISHED PRESSURE SYSTEM GROUND TEST ON BOTH PRESSURE CONTROLLERS BOTH PASS TEST, NO FAULTS.  AUTO FAIL LIGHT EXTINGISHED, REF B737-900 AMM 21-31-00-700-802.

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