Project: TerryS     -     Entry

Jun 07, 2021 5 Flap actuator assy Category: Fuselage
Continued working on this assembly. Got all the sheet metal finished, painted and nutplates installed. It really doesn't look like much, considering how long it took, but there is a lot of on & off and some head scratching to get it all to fit right.

Case in point, The thru bolt that comes in the hardware in the electric flap kit is way too long. This seems to be a common theme with this sub-kit, because there are a couple of other parts in there that they specifically tell you to not use because they have been superseded. The callout on the print is for a AN4-16 bolt, so I rummaged around for a while and found one, but when I did a trial fit of the actuator in the channel I discovered the threads on the AN bolt were riding inside the F-766B angle, like the bolt wasn't long enough.

Went back to the print and finally discovered that the hole in the F-766A channel gets drilled out to 5/8" so the bolt head sits down in it and rides just on the F-766C plate. Drilled out the 4 rivets that hold that plate in, upsized that hole and sure enough, that made the difference. the threads on the bolt are now appropriately out of the angle.

Installed all the nutplates for this assembly. Soee of the structure here is pretty thin stuff, so instead of countersinking for oops rivets to hold the nutplates on, I went ahead and took the time to dimple everything, including nutplates.

It's all pretty much ready to go together except for 3 rivets that attach the F-767 Plate to the F-766A actuator channel. I can't find a rivet callout to tell me whether these should be flush or pan head rivets. Seems like they should be pan head, because thats the callout for the rivets that hold on the F-766B angle in the same general vicinity, but I put a call out on VAF to see what most people are doing here.


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