Operators of the Pratt & Whitney Canada PT6 will be familiar with the need for hot section inspections half way to TBO. General Electric is touting the lack of hot section inspection requirements for their GE H75 engine. How did GE eliminate the need for the added inspections?

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    $\begingroup$ It looks like they use single piece rotors where the PT-6 uses blades connected to a central hub to form the rotor. They also use more forgiving metals like titanium. $\endgroup$ – Ron Beyer Jul 13 '16 at 20:03

this is because the fact that GE H series engines do not have fuel nozzles and feed fuel into combustion chamber through a rotating shaft. this design is much less sensitive to the fuel quality and combustion deposits in comparison with usual fuel nozzles

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