(A)B 412 with collective stuck down....
I have had a different but similar problem solved (eventually) by replacing one of the intergrated valves. I think you have done all the other possibilities already.
Join Date: Jul 2001
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Mmmmm ....
Time to change the Hydraulic System Interlock control block ....
seems like the Hyd pressure when a/c is run above the 80% is a clue ... but snag not being there with the Hyd test rig running is the confuser.
There must be a leak-by somewhere causing the Hydraulic lock my guess is the interconnect block.
As usual I stand to be corrected as required!
Good Luck
Time to change the Hydraulic System Interlock control block ....
seems like the Hyd pressure when a/c is run above the 80% is a clue ... but snag not being there with the Hyd test rig running is the confuser.
There must be a leak-by somewhere causing the Hydraulic lock my guess is the interconnect block.
As usual I stand to be corrected as required!
Good Luck
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Join Date: Feb 2009
Location: Leeuwarden
Age: 59
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final succesfull result
We installed a overhauled set of main rotor blades and that solved the problem. Still we've a questionmark how this problem occured from one day to the other. For now we are operational again and thats all whats matter.
Many thanks for all the reply.
Many thanks for all the reply.
