Service difficulty report · Turbine

Difficulty date
September 26, 2001
Submitted
October 25, 2001
Operation
General aviation
Engine
Pwa JT8D15
Part
Turbine
Part number
769104
Part serial
BLDLBU5153
Condition
Cracked
Location
Engine
Part time
7,914 hours
Stage of operation
IN
How discovered
V
Nature of condition
O
Precautionary procedure
K

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

What was found

THE 4TH STAGE TURBINE DISK BALANCE WEIGHT FLANGE HAS MULTIPLE CRACKS (APPROX. 80) INITIATING FROM THE SCALLOP AND BALANCE WEIGHT HOLES. CRACK LENGTH VARIES FROM .001 TO .5 INCH. IT WAS NOTED THAT ONE CRACK IS PROGRESSING PAST ONE OF THE TWO OIL DRAIN HOLES AND INTO THE RADIUS OF THE DISK OUTER RIM.