Well, for some reason, the aircraft owner refuses to give us the log books. If this report is accurate, why would they refuse our discovery? They also refused to allow us to inspect the engine. This NTSB report says that there was no problem with the engine as I have excerpted below. This was not true. How can we believe the rest of the report? What else could have caused damage to the power turbine wheel other than flying beyond its limit of use? My lawyer says that the PT6 can only be used up to 7200 hours. That is only allowed by Pratt Whitney after they inspect and sign off on it after it is rebuilt at 3600 hours. This aircraft had over 10,000 hours on it. He believes the engine may have had 8000 hours on it or close to it.
TESTS AND RESEARCH
Engine
The engine was examined and disassembled at the manufacturer's facility by the investigative party members. The group agreed that there was no evidence of preimpact mechanical malfunctions or failures that would have precluded normal operation.