Those mechanical failure figures are far higher than most accepted numbers. Most OEMs (Agusta, Bell, Eurocopter) quote Human Factors as being accountable for ~75% of causes, with inherent mechanical failures being attributable for less than 10% (if memory serves). We should see some definitive figures from the
Joint Helicopter Safety Analysis Team (JHSAT) before too long.
Originally Posted by EN48
And while the 407 engine is a 250 series, it is quite different from the C20. I am wondering if the the C47B has a siginificantly different pattern of failures?
The C47B has suffered from a couple of major design problems, including third stage turbine failures and FADEC failures (which led to a fleet stand-down and development of the reversionary governor after the tragic loss of a USFS 407 during the Challenger debris recovery effort in 2003).
I/C