(A)B 412 with collective stuck down....
Hope to receive some response on our latest problem with one AB412SP.
After 25hrs inspection (only inspection) we encountered a collective problem during 100% HYDR check (first flight of the day): with only one hydr system on (no matter #1 or #2 !) not able to move collective fully down, stuck at about 30% Torque. When we switched on both systems: collective went down easily. Checked everything from sleeve assy to hub, even replaced the HYDR actuator. Last test flight: max rate-of-descent with one HYDR system off: 1500ft/pm!
This can not be good....
Maybe somebody else encountered this? Hope to hear some reactions
Many thanks from The Netherlands/ 303 SAR Sqn!