What was found
**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.
- Difficulty date
- March 27, 2025
- Submitted
- March 27, 2025
- Operation
- Air carrier
- Aircraft
- N411UP
- Make and model
- Boeing 75724APF
- Aircraft serial
- 23851
- Aircraft time
- 38,562 hours, 25,946 cycles
- System (JASC)
- 7532 · Compressor Bleed Valve
- Part
- Bleed Valve
- Condition
- Faulted
- Location
- Right
- Stage of operation
- CR
- How discovered
- O
- Nature of condition
- F
- Precautionary procedure
- O
As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.