Service difficulty report · Turbine Blades · Boeing 737300

Difficulty date
June 14, 2004
Submitted
August 30, 2004
Operation
Air carrier
Make and model
Boeing 737300
Engine
Cfmint CFM563C1
Part
Turbine Blades
Condition
Cracked
Location
Turbine Wheel
Part time
5,655 hours, 2,823 cycles
Component
Turbine Wheel
Component part number
1475M29P02
Stage of operation
NR
How discovered
9
Nature of condition
O
Precautionary procedure
O

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

What was found

THE HPT DISC WAS FOUND WITH 5 CRACKED FIR TREES. MFG WAS INFORMED AND HAVE REQUESTED THE HPT DISC AND HPT BLADES BE RETURNED FOR INVESTIGATION. HPT AND LPT NOZZLE WERE INSPECTED AND NO DEFECTS THAT COULD HAVE AFFECTED THE DISC NOTED. FUEL NOZZLES FLOW, WERE SATISFACTORY. THE ENGINE HAD EXPERIENCED AN OVER TEMPERATURE EVENT OF DURATION 33 SECONDS, PEAK EGT 975.5 DEG CAUSED BKA VBV SCHEDULING PROBLEM.

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