# SDR IPXA2025032794505

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: March 27, 2025
- Submitted: March 27, 2025
- Operation: Air carrier
- Aircraft: [N411UP](https://openairdocs.org/aircraft/N411UP), registered now
- Make and model: Boeing 757-24APF
- Registry model: [Boeing 757-24APF](https://openairdocs.org/model/boeing-757-24apf) (OpenAirDocs)
- Aircraft serial: 23851
- Aircraft time: 38,562 hours, 25,946 cycles
- System (JASC): [7532 · Compressor Bleed Valve](https://openairdocs.org/jasc/7532)
- Part: Bleed Valve
- Condition: Faulted
- Location: Right
- Stage of operation: CR
- How discovered: O
- Nature of condition: F
- Precautionary procedure: O
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/IPXA2025032794505

## Discrepancy

**SDR FILED OPEN** **DIVERSION**RIGHT BLEED AIR OSCILLATING RAPIDLY AT FL 390. THIS WAS CAUSING ENG TO SURGE FROM 1.17 TO 1.34 EPR ALONG WITH A YAWING MOTION TO AIRCRAFT. AFTER BLEED VALVE SHUT OFF, ENG BEHAVED NORMALLY.

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