FAA Mechanic ACS Codes
The FAA Mechanic Airman Certification Standards break the A&P written tests into 40 subject areas. Every question on your test — and every code on your failure report — maps to one of them. Below is each area, what it covers, and free practice questions drawn from our 4,661 published, ACS-tagged questions.
General — 12 areas
1,558 practice questions
Tested on the FAA General written test — required for both ratings.
- Fundamentals of Electricity and Electronics
AM.I.A · FAA-H-8083-30
- Aircraft Drawings
AM.I.B · FAA-H-8083-30
- Weight and Balance
AM.I.C · FAA-H-8083-30
- Fluid Lines and Fittings
AM.I.D · FAA-H-8083-30
- Aircraft Materials, Hardware, and Processes
AM.I.E · FAA-H-8083-30
- Ground Operations and Servicing
AM.I.F · FAA-H-8083-30
- Cleaning and Corrosion Control
AM.I.G · FAA-H-8083-30
- Mathematics
AM.I.H · FAA-H-8083-30
- Regulations, Maintenance Forms, Records, and Publications
AM.I.I · FAA-H-8083-30
- Physics for Aviation
AM.I.J · FAA-H-8083-30
- Inspection Concepts and Techniques
AM.I.K · FAA-H-8083-30
- Human Factors
AM.I.L · FAA-H-8083-30
Airframe — 15 areas
1,748 practice questions
Tested on the FAA Airframe written test.
- Metallic Structures
AM.II.A · FAA-H-8083-31
- Non-Metallic Structures
AM.II.B · FAA-H-8083-31
- Flight Controls
AM.II.C · FAA-H-8083-31
- Airframe Inspection
AM.II.D · FAA-H-8083-31
- Landing Gear Systems
AM.II.E · FAA-H-8083-31
- Hydraulic and Pneumatic Systems
AM.II.F · FAA-H-8083-31
- Environmental Systems
AM.II.G · FAA-H-8083-31
- Aircraft Instrument Systems
AM.II.H · FAA-H-8083-31
- Communications, Light Signals, and Runway Lighting Systems
AM.II.I · FAA-H-8083-31
- Aircraft Fuel Systems
AM.II.J · FAA-H-8083-31
- Aircraft Electrical Systems
AM.II.K · FAA-H-8083-31
- Ice and Rain Control Systems
AM.II.L · FAA-H-8083-31
- Airframe Fire Protection Systems
AM.II.M · FAA-H-8083-31
- Rotorcraft Fundamentals
AM.II.N · FAA-H-8083-31
- Water and Waste Systems
AM.II.O · FAA-H-8083-31
Powerplant — 13 areas
1,355 practice questions
Tested on the FAA Powerplant written test.
- Reciprocating Engines
AM.III.A · FAA-H-8083-32
- Turbine Engines
AM.III.B · FAA-H-8083-32
- Engine Inspection
AM.III.C · FAA-H-8083-32
- Engine Instrument Systems
AM.III.D · FAA-H-8083-32
- Engine Fire Protection Systems
AM.III.E · FAA-H-8083-32
- Engine Electrical Systems
AM.III.F · FAA-H-8083-32
- Engine Lubrication Systems
AM.III.G · FAA-H-8083-32
- Ignition and Starting Systems
AM.III.H · FAA-H-8083-32
- Engine Fuel and Fuel Metering Systems
AM.III.I · FAA-H-8083-32
- Reciprocating Engine Induction and Cooling Systems
AM.III.J · FAA-H-8083-32
- Turbine Engine Air Systems
AM.III.K · FAA-H-8083-32
- Engine Exhaust and Reverser Systems
AM.III.L · FAA-H-8083-32
- Propellers
AM.III.M · FAA-H-8083-32
Failed a written test? Turn your ACS codes into a study plan
Enter the codes from your FAA fail report and get the exact areas to re-study, with handbook references for each.