Engineering Notice Concerning Flap and Aileron Nose Skin Rivet Size (395 and Below)

Source: 1999 Beartracks, Bob Barrows

Reference plans number 395 and below, Drawings #9 and #10. The 3/32" stainless steel pull rivets holding the nose skins to the nose ribs have been changed to 1/8" aluminum pull rivets. The cost and availability of 3/32" S.S. rivets has become a problem. If you have already assembled the ailerons and flaps with the S.S. you can leave them in, they do a good job.

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1999 Engineering Notice Regarding Upper Front Door Hinge Positioning (416 and below)

Engineering Notices

Source: 1999 Beartracks, Bob Barrows

Reference plans number 416 and below, Drawing #16. As shown in the drawing below change the 5 1/2" dimension to 5 3/4" to increase clearance between door frame and bottom of the wing in the open position. If the fuselage is already welded up, adjust hinge location for needed clearance.