Message-ID: <004101c18051$21aa4dc0$6a5de8c7@direct>
From: "Ted Stanley" <ted@vineyard.net>
To: "LML Posting" <lancair.list@olsusa.com>
Subject: IV manual error
Date: Sat, 8 Dec 2001 20:28:52 -0500
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Hi All -

Soon I will be taking delivery of my IV kit but in the mean time have
received the builders manuals.

There is an error in Chapter 8 page 8-29 showing the assembly of the aileron
pushrod ends. Hopefully it was nothing but a typo, but a dangerous one. This
page shows using AN470A4-24 rivets.  WRONG ! The correct rivet is an
AN470AD4-4.

As most of you may know, NEVER use an "A" rivet in a structural application.

Lancair is aware of the problem in the manual and I was told that they would
be publishing a correction.

It's interesting to note that a few days ago Cirrus, the arch rival of The
Lancair Company (Columbia 300 and 400), issued a mandatory service bulletin
which affects 116 Cirrus SR22 aircraft. Part of Cirrus SB 22-55-03 states:

 COMPLIANCE
 Mandatory: Cirrus Design considers this Service Bulletin to be mandatory.
Accomplish this Service Bulletin as soon as possible, not to exceed 10
flight hours. Compliance time begins upon receipt of this Service Bulletin.

 PURPOSE
 Some MS20470A4 rivets may have been installed on some SR22 control surface
attach points in place of the required MS20470AD4 rivets. These rivets are
of a softer alloy (1100-F) than the alloy used in the required rivets
(2117-T3) and have less strength. Failure of these rivets may constitute a
safety of flight issue. The purpose of this Service Bulletin is to inspect
specified rivet installations at the rudder mid and upper hinge and the
elavator torque tube attach points, and replace any rivets that are
determined to be of incorrect type.

As a comparison:

"A" rivet - Shear Strength 10000 psi - Bearing Strength 25000 psi
"AD" rivet - Shear Strength psi 30000 - Bearing Strength 100000 psi

Y'all be careful out there.

Ted Stanley - A&P-IA


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