AFTER TAKEOFF, THE PILOT WAS CLEARED TO CLIMB TO 6000 FT MSL. WHILE CLIMBING THROUGH ABOUT 5000 FT, HE HEARD A LOUD NOISE (BAM) AS THE LEFT ENGINE LOST POWER. THE LEFT ENGINE WAS SHUT DOWN AND FEATHERED AND A LANDING WAS MADE WITH NO OTHER PROBLEMS. AN INVESTIGATION REVEALED THAT THE THIRD STAGE TURBINE WHEEL HAD FAILED FROM FATIGUE. PORTIONS OF THE WHEEL, PROPELLED BY CENTRIFUGAL FORCE, EXITED THE RIGHT SIDE OF THE ENGINE CASE AND PENETRATED THE LEFT SIDE OF THE CABIN, RESULTING IN MINOR DAMAGE
Mitsubishi MU-2B-25
May 25, 1979Accident
Normal Retraction/Extension Assembly; Material Failure. Factors: Inadequate Preflight Preparation And/Or Planning; Previous Damage