What was found
NR 4 ENGINE BLEED SURGES EPR AT FL 400 SURGES BETWEEN 1.17 - 1.26. ACCOMPLISHED HIGH POWER RUN AT 1.20 EPR NO FLUCTUATION IN POWER SETTING.
- Difficulty date
- March 24, 2013
- Submitted
- March 27, 2013
- Operation
- Air carrier
- Aircraft
- N181UA
- Make and model
- Boeing 747422
- Aircraft serial
- 25278
- Aircraft time
- 89,750 hours, 10,854 cycles
- Engine
- Pwa PW4056
- System (JASC)
- 7500 · Engine Bleed Air System
- Part
- Shutoff Valve
- Part number
- 79027013
- Part serial
- 100576
- Condition
- Surges
- Location
- Nr 4 Engine
- Stage of operation
- NR
- How discovered
- O
- Nature of condition
- R, J
- Precautionary procedure
- O
As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.