PROP STRIKES AND THE INSURANCE INDUSTRY
WHAT DO I DO AFTER I HAVE HAD A PROP STRIKE ON MY AIRPLANE ENGINE, AND WHY?
When a prop strike incident occured, standard industry accesptance was to have the mechanic remove the propeller and dial indicator, "or check the crankshaft flange for being out of limits."
This practice prohibited possible hidden damage from being discovered, but was only the procedure insurance companies would pay for.
Blueprint Aircraft Engines began investigating internal amage created from prop strike stresses, particularly in crankshaft an counterweight locations.
Blueprint prepared a detailed report on internal stresses which can develp from a propstrike incident and submitted this report to the insurance industry.
Upon revieing the signifigance of the Blueprint Aircraft Engines report by Edward J Rachanski, Jr., the industry agreed to pay for engine disassembly and internal insection(s) of the engine after a propstrike incident).
The Blueprint report provided aircraft owners with the proper financial support from their insurance company and a peice of mind in having their engine and aircraft properly inspected before return to service.
The Blueprint report LOWERED LIABILITY EXPOSURE for BOTH the aircraft owner and the insurance industry, benifiting both you, the owner, as well as lowered future safety concernce in an unfortunate an forseen event.
We see ourselves as front-runners of this decision and it is now a part of the industry stanadard for these procedures that we know, first hand. And, we are proud to provide them with honor and pride in our workmanship when doing it.
Reason Behind The Blueprint Propstrike Inspection Report....
A Continental IO 520 engine had experienced a Propstrike incident 87 hours after its overhaul.
The aircraft owner experienced an in flight catastrophic failure when the counterweight blade failed (actual photos below).
With the Continental crankshaft being a non forged part, imperfections inside the metal grain created a failure 87 hours after the initial propstrike incident.
On Propstrike inspections, Magnaflux or Ultrasound will not detect these imperfections.
That is why Blueprint goes a step further and will X Ray your crankshaft counterweight blades after a propstrike incident.
Photo shows broken piece of counterweight blade that separated from the crankshaft causing catastrophic inflight failure.
Broken piece put in place from where it separated from counterweight blade.
Counterweight blade section where piece separated from it.