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Study for the FAA Aviation Mechanic General, Airframe and Powerplant knowledge areas with lessons, practice questions, worked study examples and review tools. Gauge is an independent study aid; it is not affiliated with or endorsed by the FAA or a testing provider. GENERAL IS FREE General's 35 lessons, question bank and timed practice form are available without a purchase. Formula/reference tools and selected Airframe and Powerplant practice are also free in this version. No account is required. MORE WAYS TO PRACTICE Review three-option multiple-choice questions, topic explanations, flashcards and scenario activities. Timed forms follow this app's study design; they are not official FAA examinations or a prediction of a passing result. Worked calculations show units and assumptions for learning. Progress, bookmarks and notes help you return to difficult topics. ONE-TIME FULL ACCESS A non-consumable purchase opens the Airframe and Powerplant lessons, question banks and timed forms, plus their associated review features. There is no subscription. The current price for your App Store region is shown before purchase. USE CURRENT SOURCES FOR REAL WORK Bundled study material and formula/reference tools can be used offline. Purchases, Restore and external references may need a connection. For actual aircraft maintenance, use current approved aircraft data and procedures. This app is not maintenance or return-to-service authority. Confirm current testing requirements with the FAA and your testing provider before relying on any study format.