Service difficulty report · Compressor · Boeing 747422

Difficulty date
December 2, 1997
Submitted
March 26, 2000
Operation
Air carrier
Aircraft
N176UA
Make and model
Boeing 747422
Aircraft serial
24383
Engine
Pwa PW4056
Part
Compressor
Condition
Deteriorated
Location
Nr 1 Engine
Part time
15,130 hours
Stage of operation
TO
Nature of condition
Y
Precautionary procedure
C, D

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

What was found

COMPRESSOR STALL ON TAKEOFF, SUSPECT NUMBER 1 ENGINE. ENGINE PARAMETERS APPEARED NORMAL. MAX EGT NOT NOTED. *S/D* ENGINE SURGED ON TAKEOFF DUE TO GENERAL DETERIORATION OF THE HIGH PRESSURE COMPRESSOR AND EXCESSIVE BLADE TIP CLEARANCES. REPLACED ENGINE.