# SDR CALA2025031302747

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: March 10, 2025
- Submitted: March 13, 2025
- Operation: Air carrier
- Aircraft: [N14106](https://openairdocs.org/aircraft/N14106), registered now
- Make and model: Boeing 757224
- Aircraft serial: 27296
- Aircraft time: 111,397 hours, 26,234 cycles
- System (JASC): [2130 · Cabin Pressure Control System](https://openairdocs.org/jasc/2130)
- Part: Relief Valve
- Part number: 1036423
- Part serial: 3076
- Condition: Damaged
- Location: Zone 100
- Part time: 104,769 hours, 23,616 cycles
- Stage of operation: IN
- How discovered: V
- Nature of condition: O
- Precautionary procedure: K
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/CALA2025031302747

## Discrepancy

FOUND LOWER CABIN POSITIVE PRESSURE RELIEF VALVE MISSING LOWER FLAPPER. UPPER FLAPPER WAS REMOVED AND DEFERED ON LOG 3881765. FLAPPER SHAPE IS HALF CIRCLE OF 3 INCHES RADIUS. LOWER CABIN PRESSURE RELIEF VALVE CDL ON LOG 3881765

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