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In a message dated 8/8/01 12:23:50 AM Eastern Daylight Time, Martin Heisler writes:

BEFORE NEXT FLIGHT!  If your IV or any other Lancair model has a hydraulic system filter (p/n B-4F-60) installed, before your next flight disassemble the filter (use 3/4" wrenches) and discard the sintered metal filter element and the spring.

HI , is this the one that is very close to the return side of the emergency handpump?

Martin, the parts in (both sides) of the emergency hand pump lines should be check valves. It's important that they not be removed. The filter in question is an "aftermarket" item sold in the Lancair Catalogue, and not included in any kits as original equipment as far as I can tell. It looks a bit like one of the kit-provided check valves, but is a bit bigger in diameter. Although this filter could be installed anywhere in the system, most knowledgeable builders would install it somewhere in the main hydraulic pump return line. Send me a direct post and I'll send you a digital picture if you'd like.

Bob Pastusek

LML website:   http://www.olsusa.com/mkaye/maillist.html
LML Builders' Bookstore:   http://www.buildersbooks.com/lancair

Please send your photos and drawings to marvkaye@olsusa.com.