Longranger crash, South Africa
Thanks for the input, folks.
Subsequently found out that a Jetranger went down in RSA with the same problem. That makes 4 in this neck of the woods.
Seems to me that if the tightening of a nut can stress the flange, or that a slight misalighnment of a pipe can keep it in stress, then you can bet that we'll have more failures.
That sound like poor design to me.
Incidentally someone in the industry sugested that when we tried to find high Fx resonance with a Chadwick we were unlikely to find a problem because it is not designed to pick up a turbine bearing going pear-shaped. It is better at medium frequencies such as props, rotors, drive-shafts. He sugested something called " microvib" (I think that's the spelling) Any comments?