# SDR DALA2025031101874

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: March 10, 2025
- Submitted: March 11, 2025
- Operation: Air carrier
- Aircraft: [N824DN](https://openairdocs.org/aircraft/N824DN), registered now
- Make and model: Boeing 737932ER
- Aircraft serial: 31935
- Aircraft time: 32,792 hours, 12,679 cycles
- System (JASC): [2130 · Cabin Pressure Control System](https://openairdocs.org/jasc/2130)
- Part: Check Valve
- Part number: 71211997101AC
- Part serial: 0119485
- Condition: Faulty
- Location: Cabin Pressure
- Part time: 75,163 hours, 28,189 cycles
- Stage of operation: CL
- How discovered: O
- Nature of condition: J
- Precautionary procedure: A
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/DALA2025031101874

## Discrepancy

SHIP 3824 -ATB/PRESS- RETURNED TO JFK DUE TO CABIN PRESSURE UNCONTROLLABLE. CORRECTIVE ACTION: FOUND GROUND AIR CHECK VALVE STUCK OPEN, REPLACED SAME. PERFORMED DPCP BITE CHECK. FOUND DCPC-1 FAULT CODE 30 'LO INFL/ HI LEAKG". REPLACED DCPC-1 PRECAUTIONARY. OPS CHECKS GOOD.

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