Solo Endorsement

A written authorization from a flight instructor in a student pilot's logbook (and on their student pilot certificate for the first solo) certifying that the student has demonstrated proficiency to fly alone. Under 14 CFR 61.87, the instructor must provide training in specific maneuvers and procedures, administer a pre-solo written exam, and determine the student is competent before endorsing. Solo endorsements are valid for 90 days and must specify make and model of aircraft.