Service difficulty report · Turbine Wheel · Skrsky S76A

Difficulty date
June 29, 2005
Submitted
August 3, 2005
Operation
General aviation
Make and model
Skrsky S76A
Aircraft time
21,808 hours
Engine
Allsn 250C30S
Part
Turbine Wheel
Part number
6898663
Condition
Failed
Location
Third Stage
Stage of operation
LD
How discovered
O
Nature of condition
X, T, E
Precautionary procedure
E

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

What was found

DURING SCHEDULED LANDING, WHILE THE WEIGHT OF THE A/C WAS ALREADY ON WHEELS, PILOT HEARD A LOUD BANG FOLLOWED BY NUMBER 2 ENGINE N2 DECELERATION AND ENGINE CHIPLIGHT INDICATIONS. PRELIMINARY INVESTIGATION REVEALED FAILURE OF THE THIRD STAGE TURBINE WHEEL (SEE ATTACHED PHOTO OF SECTIONS OF THE WHEEL'S OUTER SHROUD). FULL INVESTIGATION IS TO FOLLOW AT STANDARD AERO.