Keith,

Buy Wolfgang's LNC2 Gear Fixer. It weighs about 2 oz and takes less that 10 minutes to install. Your gear will always go up when it should and down when it should. No more line bleeding.

The Fixer senses when both the high and low pressure switches are on and runs the pump in the appropriate direction. The pump running relieves the pressure on the proper side (high or low).

If you have any questions, feel free to call.

Every once in a while, the gear will also not come down. This occurs after a long high altitude flight in cold air and then a descent to warmer air. This problem is easy to fix, if you remember, by opening and immediately closing the dump valve. I forgot one time and landed gear up. The Fixer would have saved my bacon.

I have also noted a 50°F temperature change happens to be the magic number for when the pressure in both switches is high enough to lock the system.

Lorn

> From: Keith Smith <keith.smith@gmail.com>
> Date: March 31, 2011 3:24:59 PM EDT
>
> Quite possibly one of the best posts I've ever read.  Thanks, Tom, for taking the time so share those experiences!
>
> I recently experienced the inability to raise the gear. A quick call to Rick Argente (Lancair owner/builder in NJ) provided the solution...bleed the line. He said it's a common issue when flying from cold locations (NJ) to warmer destinations (Georgia).
>
> I also get hear the pump activate in flight for a fraction of a second every 20-30 minutes or so, which I suspect points to a leak of some sort.
>
> Keith Smith
> N360JH

--
Lorn H. 'Feathers' Olsen, MAA, ASMEL, ASES, Comm, Inst
DynaComm, Corp., 248-345-0500, mailto:lorn@dynacomm.us
LNC2, FB90/92, O-320-D1F, 1,790 hrs, N31161, Y47, SE Michigan