Service difficulty report · Blade · Boeing 747422

Difficulty date
August 23, 1996
Submitted
March 26, 2000
Operation
Air carrier
Aircraft
N186UA
Make and model
Boeing 747422
Aircraft serial
26875
Engine
Pwa PW4056
Part
Blade
Part number
55H705
Condition
Failed
Location
Compressor
Part time
3,628 hours
Stage of operation
CR
Nature of condition
O
Precautionary procedure
E

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

What was found

WHILE IN CRUISE AT FL 370 AND EPR 1.21, STALL CONDITION DEVELOPED. REDUCED THROTTLE AND CONDITION CEASED FOR SHORT TIME, HOWEVER, ENGINE THEN STALLED REPEATEDLY. ENGINE SHUT DOWN. HIGH PRESSURE COMPRESSOR STAGE 5 BLADE FAILED. REPLACED ENGINE. PART TOTAL CYCLES, 388.