Charley,

Kit number 323, flying since end 2010, and about 80 cycles. I have already
repaired my main gear over-centre link actuator attachment tabs - they
showed signs of fractures, but nothing like yours. Nose gear seems fine,
for now, but I'll have to change that sometime soon. BUTŠ.what your first
pic seems to show is an emerging forest of fatigue cranks around the main
over-centre link attachment shank. I find that a bit worrying, as failure
in that area was not the subject of the SB 074-0111.  What does Lancair
have to say about that? And I wonder why they haven't covered that in the
SB-074Š or is there something else coming from them?

Regards,

John

 
John N G Smith
Tel / fax:    +61-8-9385-8891
Mobile:      +61-409-372-975
Email:         john@jjts.net.au





On 3/04/12 10:21 PM, "Charles Brown" <browncc1@verizon.net> wrote:

>Short story:  My 2006 Legacy kit with 2008 overcenter links has the
>flawed parts and needs fixing.
>
>Sorry gang, I couldn't find the recent thread to link this to, but it's
>about the overcenter links and service bulletin 074-0111 covering
>overcenter links and main gear retract actuators.  This is from my
>Legacy, relevant data:
>-- Kit #299, original parts issue Nov 2006
>-- Overcenter links updated Aug 2008 because of cracks from the
>manufacturing process found in original issue links (pic 1).
>-- First flight Sept 2011, now has 110 hours and approx 200 cycles on the
>gear.  Nothing rough, I always make perfect landings...  er...  mostly.
>-- Left overcenter link severely cracked on one tab, not the other (pics
>2, 3).  Material thickness is about 0.10 inches rather than 0.16
>specified in the service bulletin.
>-- Actuators were issued *without* the spherical bearing.
>-- I haven't pulled the right link, will do that tomorrow.
>Lancair offers refurb and powder coat of each link for $100, and new
>actuator parts with spherical bearings for $70 each, for a total of $340
>plus shipping for a full shipset; and they claim that with powder
>coating, the turnaround time is 2 weeks; without powder coating, 2 days.
>
>Note that retraction was unaffected with this level of cracking (I did a
>gear swing before taking everything apart).  Prob because one tab was as
>yet undamaged.
>
>Ross at Lancair Tech Support claims that the normal way to find out about
>a servcie bulletin is just to log in and check periodically; he doesn't
>know why some owners got a notice and others (me) did not.
>
>Charley Brown
>
>--
>For archives and unsub
>http://mail.lancaironline.net:81/lists/lml/List.html