Service difficulty report · Compressor · Boeing 777222

Difficulty date
August 26, 1999
Submitted
March 26, 2000
Operation
Air carrier
Aircraft
N785UA
Make and model
Boeing 777222
Aircraft serial
26954
Engine
Pwa PW4090
Part
Compressor
Condition
Stalled
Location
Lt Engine
Stage of operation
CL
Nature of condition
J
Precautionary procedure
E, A

As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.

What was found

SHORTLY AFTER DEPARTURE IAD ENROUTE TO FRA, LEFT ENGINE INDICATED HIGH EGT ACCOMPLANIED BY ENGINE SURGE. ACCOMPLISH ENGINE SHUTDOWN AND RETURNED TO IAD. SUPPLEMENTAL DATA UPDATE COMPRESSOR STALL WAS CAUSED BY COMPRESSOR VARIABLE VANE SYSTEM FAILSAFED TO FULL OPEN POSITION.