Service difficulty report · Compressor Wheel

Difficulty date
July 17, 2001
Submitted
July 17, 2001
Operation
General aviation
Engine
Pwa JT9D*
Part
Compressor Wheel
Part number
500110801
Part serial
M62358
Condition
Fretted
Location
Engine
Part time
31,003 hours, 10,225 cycles
Stage of operation
IN
How discovered
W
Nature of condition
W
Precautionary procedure
K

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

What was found

EXCESSIVE FRETTING DAMAGE ON BLADE SLOT PRESSURE FACES BEYOND LIMITS IN ACCORDANCE WITH JT9D OHM P/N 646028 SECTION 72-35-04 REV 109 FRETTING CHECKS 0.0024". FRONT SNAP AND SHOULDER ARE OVERSIZE 0.002", REAR SNAP AND SHOULDER ARE OVERSIZE 0.002" AND OUT OF ROUND 0.004". REPAIR ORDER RECEIVED FROM P&W SMMO REQUESTED INSPECT TO THE LATEST REVISION OF E/M 646028 DIMENSIONAL INSPECT PART AND REPORT FINDINGS TO JEFF FISCUS. PART WAS RECEIVED IN OVERHAUL CONDITION.