# SDR IPXA2024051099060

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: May 10, 2024
- Submitted: May 10, 2024
- Operation: Air carrier
- Aircraft: [N582UP](https://openairdocs.org/aircraft/N582UP), registered now
- Make and model: Boeing 747-4R7F
- Registry model: [Boeing 747-4R7F](https://openairdocs.org/model/boeing-747-4r7f) (OpenAirDocs)
- Aircraft serial: 29053
- Aircraft time: 112,224 hours, 19,611 cycles
- System (JASC): [2133 · Pressure Regulator/Outflow Valve](https://openairdocs.org/jasc/2133)
- Part: Motor
- Condition: Failed
- Location: Outflow Valve
- 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/IPXA2024051099060

## Discrepancy

**ATB** THE FOLLOWING ECAS MSG POPULATED CLIMBING OUT OF SDF CABIN ALT AUTO FOUND FAULT CODE 21227 IN TELEMETRY. LEFT OUT FLOW VALVE A/C MOTOR FAIL.<BR>REMOVED AND REPLACED LEFT OUTFLOW VALVE A/C MOTOR PER AMM 21-31-06

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