Brief Description: F704:Countersink for Double Flush Rivets
I had previously dimpled the 5 outboard most rivet holes on the flanges of the forward F704 bulkhead and missed the note that these holes needed double flush rivets in order to clear the gear mounts. Iended up squeezing the dimples out using the pneumatic squeezer and then countersinking these holes free hand using the 90 degree drill attachment since the microstop countersink cage wouldn't fit into this area. I also squeezed out the dimples in the bottom skin and countersunk the holes there as well. This worked out fine but looking back I'm not sure any of this was necessary. When I trial fit the gear mounts to the bulkhead it looked like there would be plenty of room to accommodate normal shop heads on these rivets without making them double flush. Oh well, I followed the plans and these will now be double flush.
Trial fit gear mounts
Flatten dimples and then countersink instead
5 outboard holds countersunk for double flush rivets
