Private Pilot Flight Training and Instruction Flight Training Article Library | Back To 4VFR.COM FAR 61.35(a)(f) and 61 105(a) Aeronautical knowledge I certify that I have given (name) the ground instruction required by FAR 61.105(a)(1) through (6). The new version lists thirteen items of required proficiency. Written by Gene Whitt Flight Training Article Library | Back To 4VFR.COM