Service difficulty report · Compressor · Boeing 747422

Difficulty date
November 25, 1996
Submitted
March 26, 2000
Operation
Air carrier
Aircraft
N186UA
Make and model
Boeing 747422
Aircraft serial
26875
Engine
Pwa PW4056
Part
Compressor
Condition
Stalled
Location
Nr 3 Engine
Stage of operation
TO
Nature of condition
R
Precautionary procedure
A, E, J

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

What was found

NR 3 ENGINE STALLED ON TAKEOFF JUST AFTER LIFTOFF. A/C RETURNED TO FIELD. NO VISIBLE DAMAGE. NO CONTROL SYSTEM FAULTS. SURGE IS ATTRIBUTED TO POOR N2 COMPRESSOR PERFORMANCE. ENGINE TO BE REFURBISHED. ENGINE REPLACED.