STC 4387NM drawings Home › Forums › Ask the Gurus › STC 4387NM drawings This topic has 0 replies, 1 voice, and was last updated 3 years, 1 month ago by Kevin Buhler. Viewing 0 reply threads Author Posts April 16, 2021 at 15:42 #15698 Kevin BuhlerParticipant Hello, Would anyone have a pdf copy of the drawings, KD-320-DL, for Ken Blackmans O-320 STC SA4387NM? I am working with my local FSDO maintenance person to try to have the RPM restriction removed from my friends aircraft which has SA2477SW. Thanks, Kevin Buhler Author Posts Viewing 0 reply threads You must be logged in to reply to this topic. Log In Username: Password: Keep me signed in Log In