different country
Bondu 121:
because
(i) most of the engineers in this country know each other, and many have worked together. They may like or dislike the person/the organisation that the other engineer works for.
Therefore there can be bias either way -- to get one over on the engineer they don't like, or to back up their mate's decision.
(ii) There is a vested interest in one local engineering company "rubbishing" another engineering company's decision in order to get some work. So if it is the other way around (the new engineering company condemns the blades that the old engineering company said were OK), then there is quite a lot of money at stake. One red U/S placard on a set of blades will earn an engineering company around 5 grand in commission on parts and labour for re-fitting spindles, head bearings, track and balance and so on.
(iii) Engineering companies in other countries have other views and standards. it is very useful to learn from these guys. Two companies abroad that I have had dealings with (but am in no way connected to) are Joelle at Air Technologies in Belgium and Ruedi Boser at heli-something in Switzerland.
They are first class people who run first class engineering companies, and I'm sure either would be able to give an impartial and un-biased expert opinion.
Hope this helps,
Big Ls.