Flight Crew Instrument; Flight Crew Multiengine; Flight Crew Commercial
Flight Crew Last 90 Days 25; Flight Crew Total 15000; Flight Crew Type 4500
Training / Qualification; Situational Awareness
Aircraft Equipment Problem Critical; Deviation / Discrepancy - Procedural Maintenance
Aircraft Aircraft Damaged; Flight Crew Inflight Shutdown; Flight Crew Landed in Emergency Condition
Aircraft; Procedure
I had a catastrophic engine failure taking off in the first flight since a major overhaul of my Continental IO520CB engine.I feathered my left engine; and continued the takeoff; entered right traffic; came around and landed back on the takeoff runway; runway XX.I suspect the mechanic/IA who performed the field overhaul failed to properly torque the piston rods to the crank shaft.  I have not had the engine disassembled to confirm my theory.Additionally; I feel the mechanic created this situation by not performing the overhaul in a timely manner.  He would work for a few hours; leave the hangar and not get back to the job for days or weeks.  This caused him to lose track as to where he was in the overhaul process; and consequently; miss a very important step.The engine is not repairable; a total loss; but I made it back safely.
BE-55 pilot reported an engine failed during takeoff. Pilot feathered the propeller and returned for a safe landing.