Lightly countersunk mis-drilled flap fairing rivet hole. Test fit rivet; examined placement and angle of bad hole and determined it would be better not to set a plug rivet as that would likely introduce stress and cause more damage. Edge distance is ok; will fill hole with aluminum JB weld. Naomi Filiatrault helped set rivets in step holes; Andrew Haines helped dimple aft flap fairing rivet holes with close quarters dimple set and rivet puller. Machine countersunk forward flap fairing rivet holes. Martin: 1 hr. Naomi Filiatrault 0.5 hr. Andrew Haines 0.5 hr.