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FAA aviation mechanic Airframe knowledge test (AMA)

FAA A&P Airframe test prep: 773 practice questions, every answer sourced.

Practice for the FAA Aviation Mechanic Airframe (AMA) knowledge test with original questions written from the FAA's own publications. Every question shows the exact words of the FAA document that settle its answer, and links to it.

Free for each test: 30 questions, a 20-question mini exam and 3 lessons, plus the glossary. A free account (email address only) is needed after your first 10 answers. In your browser now. Android and iPhone apps are planned.

100questions in the practice exam
2 hourstime limit
70%to pass
773Airframe practice questions

The Airframe practice exam matches the FAA format for the Airframe test: 100 questions, 2 hours, 70% to pass. Its questions are the app's own, and a score on it does not predict your result on the FAA's test.

What the Airframe course includes

Five free Airframe sample questions

These five are from the Airframe free sample, exactly as they appear in the app. Choose an answer to see the explanation, the FAA's own words and the source. In the app, the choices are shown in a shuffled order.

Sample question 1 of 5Airframe inspection and records
An owner makes five flights in an airplane on which a required airworthiness directive inspection is overdue. How does 14 CFR Part 39 treat this?

Choose an answer to see if it is right, and why.

✓ Correct.

✗ Not quite. The answer is C: Each of the five flights is a separate violation of 14 CFR 39.7

Section 39.7 says anyone who operates a product that does not meet an applicable AD is in violation, and 39.9 adds that you violate 39.7 each time you operate the aircraft or use the product while the AD's requirements are unmet. The violation does not wait for an FAA notice.

The FAA's words

“If the requirements of an airworthiness directive have not been met, you violate ยง 39.7 each time you operate the aircraft or use the product.”

14 CFR 39.9

Source: 14 CFR 39.9

Sample question 2 of 5Non-metallic structures: wood, fabric, composites, windows
Which of these fabric repairs does AC 43.13-1B call a major repair that needs a logbook entry and an FAA Form 337?

Choose an answer to see if it is right, and why.

✓ Correct.

✗ Not quite. The answer is B: Installing a new fabric section over two adjacent wing ribs

AC 43.13-1B says repairing a new fabric section over two adjacent wing ribs is a major repair, requiring a logbook entry and an FAA Form 337. By contrast, 14 CFR part 43, Appendix A, lists making simple fabric patches not requiring rib stitching or the removal of structural parts or control surfaces as preventive maintenance.

The FAA's words

“Repairing a new fabric section over two adjacent wing ribs is considered a major repair. A log book entry and an FAA Form 337 must be processed accordingly.”

AC 43.13-1B, Chapter 2, paragraph 2-42, page 2-37

“(7) Making simple fabric patches not requiring rib stitching or the removal of structural parts or control surfaces.”

14 CFR Part 43, Appendix A(c)

Source: AC 43.13-1B, Chapter 2, paragraph 2-42, page 2-37 · 14 CFR Part 43, Appendix A(c)

Sample question 3 of 5Metallic structures and welding
What is the job of the shielding gas in MIG (gas metal arc) welding, and which gases does the Airframe handbook name for it?

Choose an answer to see if it is right, and why.

✓ Correct.

✗ Not quite. The answer is C: To protect the weld puddle from oxygen; argon, helium or carbon dioxide flowing around the wire

The handbook says MIG improves on stick welding because an uncoated wire is fed through the torch while an inert gas such as argon, helium or carbon dioxide flows around the wire to protect the puddle from oxygen. The arc, not a fuel gas, supplies the heat.

The FAA's words

“an inert gas, such as argon, helium, or carbon dioxide, flows out around the wire to protect the puddle from oxygen.”

FAA-H-8083-31B, Chapter 5, page 5-2

Source: FAA-H-8083-31B, Chapter 5, page 5-2

Sample question 4 of 5Flight controls and rigging
A large aircraft has a split rudder, two rudders one above the other. How do they work as airspeed increases?

Choose an answer to see if it is right, and why.

✓ Correct.

✗ Not quite. The answer is B: Both deflect together at low speed; at higher speed one becomes inoperative because one rudder is enough

The handbook says that in a split rudder arrangement both rudders deflect in the same direction at low speeds when the pedals are pushed. At higher speeds one of them becomes inoperative, as the deflection of a single rudder is aerodynamically sufficient to maneuver the aircraft.

The FAA's words

“At low speeds, both rudders deflect in the same direction when the pedals are pushed. At higher speeds, one of the rudders becomes inoperative as the deflection of a single rudder is aerodynamically sufficient to maneuver the aircraft.”

FAA-H-8083-31B, Chapter 1, page 1-26

Source: FAA-H-8083-31B, Chapter 1, page 1-26

Sample question 5 of 5Aircraft electrical systems
During an inspection, a technician finds a circuit breaker that pilots report has been tripping frequently and has been reset many times. What does AC 43.13-1B say to do?

Choose an answer to see if it is right, and why.

✓ Correct.

✗ Not quite. The answer is B: Investigate the reason for the tripping before considering replacing the breaker

AC 43.13-1B says to note breakers that open circuits frequently, need resetting more than normal or are subject to nuisance tripping, and to investigate the reason before considering their replacement. A larger breaker could let the wire overheat, and automatic-reset breakers are not recommended for aircraft.

The FAA's words

“Note those circuit breakers which have a tendency to open circuits frequently, require resetting more than normal, or are subject to nuisance tripping. Before considering their replacement, investigate the reason.”

AC 43.13-1B, Chapter 11, paragraph 11-104, page 11-49

Source: AC 43.13-1B, Chapter 11, paragraph 11-104, page 11-49

The free sample has 30 Airframe questions and a 20-question mini exam. Start free, no card needed.

Subject areas and topics

The Airframe course is arranged in these areas, with a short lesson for each topic. Lessons marked “Free lesson” are in the free sample.

Metallic structures and welding

  • Inspecting metal structures and sheet metal defectsFree lesson
  • Repair materials, aluminum heat treatment, structure typesFree lesson
  • Layout, bend allowance, forming, drilling and shop safetyFree lesson
  • Rivet and fastener selection, layout, installation, removal
  • Welding gases, their handling, and flame welding
  • Inert-gas welding, shielding gases and steel tube repairs

Non-metallic structures: wood, fabric, composites, windows

  • Wood: species, defects, substitutes, inspection and repair
  • Fabric covering: moisture, materials, seams and terms
  • Fabric covering: preparation, methods, inspection, repair
  • Composites: materials, defects, inspection and storage
  • Composite repair methods, fasteners and safety
  • Thermoplastics and windows: handling, care and repair
  • Restraints and upholstery inspection

Flight controls and rigging

  • Control cables, connectors, guides and cable maintenance
  • Stops, push-pull tubes, torque tubes and bellcranks
  • Rigging, flutter and control surface balance
  • Primary, secondary and auxiliary control surfaces

Airframe inspection and records

  • Part 91 inspections, Part 43 records, airworthiness rules
  • ADs, service information and approved data
  • Life-limited parts and special inspections
  • Corrosion types and identification

Landing gear, wheels, brakes and tires

  • Fixed, retractable and alternative gear and components
  • Strut servicing, bungee and spring steel gear
  • Steering, gear position and warning systems
  • Brake construction, actuation, servicing and anti-skid
  • Wheels and tires: construction, care, safety and inspection

Hydraulic and pneumatic systems

  • Hydraulic fluids, components, valves and filters
  • Hydraulic operation, servicing, troubleshooting, accumulator
  • Seals, fluid compatibility, hoses, lines and fittings
  • Pneumatic system types, components and servicing

Cabin environment: heat, cooling, pressurization, oxygen

  • Bleed air, exhaust heat exchanger and combustion heaters
  • Vapor-cycle, air-cycle and instrument cooling
  • Pressurization systems and components
  • Oxygen systems: types, components, maintenance

Aircraft instrument systems

  • Pressure instruments, pitot-static system, leak checks
  • Temperature, position and fuel quantity indicating
  • Gyros, vacuum systems, compass and direction indicators
  • Range markings, limits, bonding, panel installation
  • Annunciators, EFIS, EICAS, HUD, BITE, sensitive devices
  • Angle of attack, stall and configuration warning

Communication and navigation systems

  • Radio principles, components, interphone and intercom
  • Antennas, static wicks, avionics mounting and inspection
  • VHF, HF, SATCOM, ACARS and the ELT
  • ADF, VOR, DME, ILS, GPS and radio altimeter
  • TCAS, weather radar, GPWS, ADS-B and transponders
  • Autopilot, auto-throttle and stability augmentation

Aircraft fuel systems

  • Fuel types, their characteristics, and system types
  • Fuel components, tanks, cells and fuel flow
  • Fueling, defueling, transfer and jettison
  • Fuel system maintenance, inspection and quantity indication

Aircraft electrical systems

  • Generators, alternators, starter generators, CSD and IDG
  • Voltage regulators, overvoltage protection, inverters
  • Wire size and type, switch derating, shielding, lightning
  • Connectors, splices, terminals, switches and soldering
  • Lighting systems; instrument and panel removal
  • Troubleshooting, measurement, testing and batteries

Ice and rain control

  • Icing causes and effects, ice detection, vision
  • Anti-ice and de-ice systems and their maintenance
  • Wiper, chemical and bleed air rain control

Airframe fire protection

  • Fire classes and zones; fire, overheat, smoke, CO detection
  • Extinguishing agents, systems, inspection and maintenance

Rotorcraft fundamentals

  • Rotorcraft aerodynamics and flight controls
  • Rotor system types and rotor blade construction
  • Transmissions, drive systems and their vibration
  • Rigging, skid gear inspection, track and balance

Water and waste systems

  • Potable water and lavatory waste: operation and servicing

Where the Airframe answers come from

Every Airframe question cites FAA publications and regulations like these, with a link to the document.

The other A&P tests

One subscription covers all three tests: $19.99 a month or $79.99 a year, both renewing until you cancel. See pricing.

Independent study aid. Not affiliated with or endorsed by the FAA. The questions are original practice questions, not questions from any FAA test.