Thank you for your answer Flytest, and believe I completly agree with you about a normal operating HUMS efficiency in improving safety and maintenance costs (i.e enhancing preventive maintenance, permanent monitoring and component life times)
And I believe this system works well when fitted on an helicopter from factory.
The problem seems to come from the retrofit operation itself, and the result, with the HUMS my company has chosen, is rather disapointing compared to the investment. Basically, in the best of cases, we can use it for track and balance of main and tail rotor
For obvious reasons I cannot give too many clues here, but I am going to try an email now (I wasn't lucky last time I've tried it here) but I cannot garantee my words will be able to find your mailbox through the "cyberspace".
Sorry, I am nothing else than a miserable pilot
