Originally Posted by
GrayHorizonsHeli
my question is how fast and how high?
The only failure I'm personally aware of was a K-Flex failure and the pilot felt a klunk which put his eyes on the panel and he saw the needle splits. He caught the overspeed which he said was quick but slower than a high side gov failure.
Originally Posted by
megan
checks required on the engine, if any,...
Originally Posted by
PEASACAKE
send it for overhaul...
FWIW: I don't have a RR manual handy, but I don't recall any specific overspeed inspection for the 250 series engines. Usually if the engine exceeds any RPM limits it doesn't stop and "self-inspects" by throwing a wheel loose. However, I believe the loss of a main driveshaft falls under the "sudden stoppage" special inspection which has several levels based on component damage with the 1st levels being inspections only, ending with an overhaul requirement if the engine or xsmn mounts are deformed/broken.