S92 "unexpected control responses"

[chance it]

Originally Posted by Jimmy.

I think we may be comparing apples and oranges here. The report is clear about the human error on interpreting the HUMS data (available the night before the accident). Now, a HUMS download and analysis is made after each flight. Despite the gravity of a TR control failure, it was detectable (4.75hrs and the full left pedal) and quite different than loosing the MR without warning.

If you’ve read the AAIB reports on G-REDL and the other two bevel gear failures in the 225’s in 2012 you would also note that HUMS actually picked up these failures several hours before too .....apples and oranges ? At least now all the operators are mandated to look at the hums downloads every flight that is one good thing ....but they had to be forced !