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Testing Supplement for Flight Instructor, Ground Instructor, and Sport Pilot Instructor is the supplemental book provided when taking the flight, ground, and sport pilot written tests. Specific written tests are listed below:

Fundamentals of Instructing (FOI)

Ground Instructor–Basic AGI (BGI)
Ground Instructor–Advanced (AGI)

Flight Instructor–Airplane (FIA)
Flight Instructor–Helicopter (FRH)
Flight Instructor–Gyroplane (FRG)
Flight Instructor–Glider (FIG)
Flight Instructor–Airplane (Added Rating) (AFA)
Flight Instructor–Helicopter (Added Rating) (HFA)
Flight Instructor–Gyroplane (Added Rating) (GFA)
Flight Instructor–Glider (Added Rating) (AFG)

Military Competence Instructor (MCI)

Flight Instructor–Sport Pilot–Airplane (SIA)
Flight Instructor–Sport Pilot–Balloon (SIB)
Flight Instructor–Sport Pilot–Glider (SIG)
Flight Instructor–Sport Pilot–Lighter-Than-Air (Airship) (SIL)
Flight Instructor–Sport Pilot–Powered Parachute (SIP)
Flight Instructor–Sport Pilot–Gyroplane (SIR)
Flight Instructor–Sport Pilot–Weight-Shift Control (SIW)

FAA Reference - FAA-CT-8080-5H

Airman Knowledge Testing Supplement for Airline Transport Pilot and Aircraft Dispatcher Formally known as the Testing Supplement for Airline Transport Pilot, and Aircraft Dispatcher. This is the supplemental book provided when taking the ATP, and Aircraft Dispatcher written tests. Specific written tests are listed below:

Airline Transport Pilot (FAR 121) Airplane (ATP)
Airline Transport Pilot (FAR 135) Airplane (ATA)
Airline Transport Pilot (FAR 135)
Added Rating - Airplane (ARA)
Airline Transport Pilot (FAR 135) Helicopter (ATH)
Airline Transport Pilot (FAR 135)
Added Rating - Helicopter (ARH)
Aircraft Dispatcher (ADX)

FAA Reference - FAA-CT-8080-7D

Free FAA Written Test Supplements

These books are provided for the written exam administered by the FAA and designated Pilot Testing Centers.