JackFulford
New member
Hi All,
I need help and I am fresh out of ideas. My flaps don't seem to be operating as designed. Here are the key points
1) When flaps are cycled with the engine running below 700-800RPM, everything functions as I would expect. I put the flap lever in the down position, hydraulic pressure gauge goes to about 500-600psi, flaps deploy. When fully deployed hydraulic pressure goes to 900-1000psi, flap lever pops to neutral, hydraulic pressure goes to zero. Again with the engine running below 700-800RPM, I pull the flap handle up and everything works the same way as the flaps come up.
2) When the flaps are cycled with the engine above 800-1000RPM not so good. If I put the flap handle in the down position, Hydraulic pressure immediately goes to 900-1000psi and the lever pops back into neutral. The flaps have barely moved. This happens whether the flaps are going up or down.
3) If I hold the flap lever down with the engine above 800-1000RPM the pressure gauge goes to about 1200psi and stay there as the flaps deploy. When I release the handle the pressure goes to 0 and the flaps stop moving. Works the same way with the lever in the up position.
The things that I have tried so far have not changed the operation as described above and include:
1) swapping the restrictor that sits between the power pack and the flap actuator for another
2) Cleaned the restrictor
3) Removed the little filter elements from the restrictor
4) Removed and cleaned all the tubing between the power pack and the flap actuator.
Any thoughts? Suggestions? It has been functioning this way since it was overhauled 2 years ago by Pieffer (I know, my face is red.... )
Jack
I need help and I am fresh out of ideas. My flaps don't seem to be operating as designed. Here are the key points
1) When flaps are cycled with the engine running below 700-800RPM, everything functions as I would expect. I put the flap lever in the down position, hydraulic pressure gauge goes to about 500-600psi, flaps deploy. When fully deployed hydraulic pressure goes to 900-1000psi, flap lever pops to neutral, hydraulic pressure goes to zero. Again with the engine running below 700-800RPM, I pull the flap handle up and everything works the same way as the flaps come up.
2) When the flaps are cycled with the engine above 800-1000RPM not so good. If I put the flap handle in the down position, Hydraulic pressure immediately goes to 900-1000psi and the lever pops back into neutral. The flaps have barely moved. This happens whether the flaps are going up or down.
3) If I hold the flap lever down with the engine above 800-1000RPM the pressure gauge goes to about 1200psi and stay there as the flaps deploy. When I release the handle the pressure goes to 0 and the flaps stop moving. Works the same way with the lever in the up position.
The things that I have tried so far have not changed the operation as described above and include:
1) swapping the restrictor that sits between the power pack and the flap actuator for another
2) Cleaned the restrictor
3) Removed the little filter elements from the restrictor
4) Removed and cleaned all the tubing between the power pack and the flap actuator.
Any thoughts? Suggestions? It has been functioning this way since it was overhauled 2 years ago by Pieffer (I know, my face is red.... )
Jack
