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Lorn,
I have had the problem develop in the hangar too. (and at a fly in)
Whenever I preflight, I check that the gear pump will run and develop down
pressure on the ground before taxi. If not, I keep two wrenches in the
glove box to crack a hydraulic line with.
This works for me.
Mark Ravinski
360 1472 hrs
----- Original Message ----- From: "Lorn H Olsen" <lorn@dynacomm.us>
To: <lml@lancaironline.net>
Sent: Monday, September 21, 2009 10:33 AM
Subject: [LML] LNC2 Gear Up & Down Problems
I have determined that the problem is caused when the hydraulic
pressure at both switches is high enough that not only does the pump
not run but also high enough that when the dump valve is opened the
pressures are still not relieved to be below the pump run setting. eg.
If I fly high and the temperature on the ground, after landing, is 60
degrees farenheight more than the temperature in flight, the gear
won't go up on the next flight.
An EE friend of mine, after seeing our hydraulic system schematics,
talking to Lancair and talking to Oildyne, has come up with 3
solutions to the gear not going up and/or coming down. I am out of
town and haven't had the chance to see the solutions. Would anyone be
interested in a kit that solved the problem for $200 to $400.
--
Lorn H. 'Feathers' Olsen, MAA, ASMEL, ASES, Comm, Inst
DynaComm, Corp., 248-345-0500, mailto:lorn@dynacomm.us
LNC2, FB90/92, O-320-D1F, 1,615 hrs, N31161, Y47, SE Michigan
--
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