What was found
EN ROUTE GRU-MIA, EXPERIENCED LEFT ENGINE BLEED VALVE FLUCTUATIONS. *S/D* CAUSE WAS DETERMINED TO BE A FAULTY HIGH PRESSURE FAN AIR VALVE CONTROLLER (HPFAC), P/N: 3399100-11, LEAKING CONTROL AIR DURING HP OPENING (TOP OF DESCENT).
- Difficulty date
- February 19, 2000
- Submitted
- October 4, 2000
- Operation
- Air carrier
- Aircraft
- N777UA
- Make and model
- Boeing 777222
- Aircraft serial
- 26916
- Aircraft time
- 20,043 hours, 4,137 cycles
- Engine
- Pwa PW4077
- System (JASC)
- 7500 · Engine Bleed Air System
- Part
- Controller
- Condition
- Malfunctioned
- Location
- Lt Engine Fan
- Stage of operation
- CR
- 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.