Originally Posted by
SASless
As time progressed the problem moved on out the tail boom to the 42 degree gearbox mounting and after that was fixed....then it was the 90 degree gearbox mount. Part of those problems were vibrations.....the running joke was in time the bad vibe would get to the end of the tail stinger then we could just saw off the tail stinger and be rid of the vibe.
Similar thing with the first Agusta 109C's on introduction. Most of the frames inside the upper and lower vertical fin were found cracked and the remedy after repair was to hacksaw off the huge monstrosity of a stinger that was fitted.