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Date:  10-12-2016
Number of Hours:  5.50
Manual Reference:  
Brief Description:  Cowling

I wasn’t happy with the way the epoxy/micro balloons filled around the access door. In most areas it was a narrow gap between the door and the cowl, and I didn’t pack enough of the mixture into the gap to fill it. This left voids below the surface, so I cleaned it all out and beveled the edge of the cowl opening to make refilling the gap easier.

Another batch of epoxy/micro balloons was mixed, and this time I took care to be sure it was packed full all the way around. I won’t know the results until tomorrow.

While the reworked upper cowl was curing, I worked on mounting the lower cowl to the fuselage with the proper hardware. The holes through the cowl and the mounting flanges were updrilled to #20, then rivet holes for the anchor nuts were drilled and countersunk in the mounting flanges for #8 floating anchor nuts. The screw holes were dimpled, and the anchor nuts riveted in with 3/32” countersunk solid rivets. The holes in the lower cowl were countersunk to accept stainless steel countersunk washers.

The mounting flanges and cheek formers were clecoed back into position, then the lower cowl was mounted with the correct hardware. Everything matched up, and I am a happy camper.

Hopefully the upper cowl will get the same treatment tomorrow.
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Cheek Formers With Lower Cowl Platenuts

Cheek Formers With Lower Cowl Platenuts

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Lower Cowl Mounts With Platenuts

Lower Cowl Mounts With Platenuts

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Lower Cowl Mounted With 8-32 Countersunk Screws and Washers

Lower Cowl Mounted With 8-32 Countersunk Screws and Washers

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