I believe that I am the first RV-14 builder to put the PH Aviation flap motor in. If you find any issues with the instructions, let me know so I can revise them and send them to Pat Hatch for future builders. He was great to deal with and instrumental in prototyping the installation.
I have over 100 hours and 14 months of flying and no problems with the flap motor. It is really nice to be able to trust the position sensor’s stability. I would not recommend that anyone building an RV-14 think twice before putting in the PH Aviation unit.
I have seen a couple flap errors coming from the VP-X that controls it, but resolved those by backing off the VP-X setting for the position to use as a down limit. The VP-X is the shortcoming there because, as far as I can tell, you can’t tell it to drive the flap motor down to position X plus Y seconds and call it good for a down stop. So if you set the down limit to where the flap motor stops itself, the position sensor as digitized in the VP-X can be off by one or two when it gets to the stop under aerodynamic loads in flight, and the VP-X interprets this as a flap fault because it has been driving the motor with no change in position. Maybe there is a better solution to that, but my workaround has worked so far.