Service difficulty report · Turbine Wheel · Boeing 747400

Difficulty date
January 12, 2021
Submitted
January 12, 2021
Operation
General aviation
Make and model
Boeing 747400
Engine
Rroyce RB211524*
Engine time
106,715 hours, 14,765 cycles
Part
Turbine Wheel
Part number
UL29026
Part serial
SETM07681
Condition
Cracked
Location
Engine
Part time
85,597 hours, 11,554 cycles
Stage of operation
IN
How discovered
D
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

WE ARE SUBMITTING THIS SDR PER REQUEST OF ROLLS ROYCE. AS RECEIVED, NDT INSPECTION BY FPI METHOD FINDS MULTIPLE CRACK INDICATIONS IN THE SERRATION LOCATION 61 AND ON OUTSIDE DIAMETER LOCATION 34. WE FIND 58 OF THE 62 SERRATION LOCATIONS CONTAIN CRACKS. SOME SERRATION LOCATIONS CONTAIN MORE THAN ONE CRACK IN THE SINGLE POST. THE COMPONENT IS CURRENTLY IN OUR SHOP ON HOLD AT THIS TIME. ROLLS ROYCE WAS CONTACTED AND PROVIDED AN ENGINEERING REPORT. THEY HAVE REQUESTED WE SUBMIT THE SDR. NOTE: TIME SINCE PREVIOUS REPAIR OR OVERHAUL NOT PROVIDED SO CURRENT TT ENTERED.

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