# SDR ASAA2023102345797

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: October 23, 2023
- Submitted: October 24, 2023
- Operation: Air carrier
- Aircraft: [N471AS](https://openairdocs.org/aircraft/N471AS), registered now
- Make and model: Boeing 737990ER
- Aircraft serial: 41703
- Aircraft time: 33,847 hours, 10,551 cycles
- System (JASC): [2130 · Cabin Pressure Control System](https://openairdocs.org/jasc/2130)
- Part: Unknown
- Part number: UNKNOWN
- Condition: Unknown
- Location: Unknown
- Stage of operation: LD
- How discovered: V
- Nature of condition: J
- Precautionary procedure: K
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/ASAA2023102345797

## Discrepancy

UPON LANDING, MASTER CAUTION 'AUTO FAIL' AND 'ALTN' ILLUMINATED ON PRESSURIZATINO CONTROL PANEL. GROUNDED - YES. CONFIRMED, CPC #2 SET CURRENT LEG FAILURE 007: OFV LRU FAIL, CPC #1 SET NO RELATED RECENT FAILURES. ACCOMPLISHED CPC SYSTEM GROUND TEST PER AMM 23-31-00 OBSERVING CORRECT OPERATION AND INDICATIONS. OUTFLOW VALVE MOVEMENT NORMAL W/ NO DELAY/BINDING OBSERVED. NO HISTORY PAST 30 DAYS. ETOPS GROUND VERIFICATION SUCCESSFUL, SEAMC MIKE NOTIFIED.

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