AA.V.A.K2
A
What does AA.V.A.K2 mean?
Stall characteristics (i.e., airplane design) and impending stall and full stall indications (i.e., how to recognize by sight, sound, or feel)..
- Area of Operation
- V
- Task
- A
- Element type
- A Knowledge element — a fact, concept, or procedure the FAA expects you to know and that the knowledge (written) test draws questions from.
What you need to know
A stall is always caused by exceeding the critical angle of attack, not by any particular airspeed alone — bank angle, load factor, weight, and power setting all shift the speed at which that critical AOA is reached, so you must think in terms of AOA rather than a fixed number. Know how your airplane tells you a stall is approaching or occurring: buffet, stick shaker/pusher, aerodynamic buffet or noise changes, and control feel, and understand the difference between impending stall cues and a full stall. During takeoff or approach with partial flaps, distractions, abrupt pitch changes, tailwinds/windshear, or improper trim/power management can erode your margin above stall, so proactive AOA/airspeed awareness and go-around discipline are your defenses. Modern autoflight systems provide envelope protections in normal law, but these protections can be reduced or absent in degraded modes or after an unexpected autopilot/autothrottle disconnect, so you must be ready to recognize the disconnect and hand-fly using AOA-based recovery: reduce angle of attack first, manage bank, then adjust power and configuration to regain safe margin above stall — check your aircraft's specific automation logic and recovery procedure in the current FAA and manufacturer guidance.
Why students miss this
Students often think recovering from an approach-to-stall means minimizing altitude loss above all else, so they hesitate to lower the nose enough or they add power first and wait for it to 'fly out' of the stall instead of immediately reducing angle of attack. Another common trap is assuming autopilot/autothrottle will protect against a stall in all modes, when degraded or disconnected automation can mask the onset of a stall until it's fully developed.
Focus on: Anchor your understanding on angle-of-attack reduction as the first and non-negotiable step in any stall recovery, before worrying about altitude loss or power application.
Drill this area until it sticks
AA.V.A.K2 came from a question you missed on the FAA Airline Transport Pilot Multiengine Airplane knowledge test. Drill ACS-aligned practice questions with AI explanations and the cited FAA handbook reference behind every answer — free to start.
Missing it isn't a verdict on you — it's a sign your prep skipped the why behind it. Memorizing answer letters is exactly what leaves gaps like this. Here, every answer explains the reasoning and cites the FAA source it comes from, so the concept holds on test day and at the checkride oral.
Study this concept
Plain-English explanations of the key ideas behind AA.V.A.K2, grounded in the FAA handbooks.
Related ACS codes in A
Other elements the FAA tests under this same Task — review them together.
- AA.V.A.K1Aerodynamics associated with stalls in a partial flap configuration, to include the relationshi…
- AA.V.A.K3Factors and situations that can lead to a stall during takeoff or while on approach and actions…
- AA.V.A.K4Effects of autoflight, flight envelope protection in normal and degraded modes, and unexpected…
- AA.V.A.K5Fundamentals of stall recovery.
Common question
Why is reducing angle of attack emphasized over adding power in stall recovery?
A stall is fundamentally an angle-of-attack problem, not a power or airspeed problem, so the airplane cannot un-stall until AOA is reduced below the critical angle—power alone can even worsen the situation in some configurations by increasing pitch-up tendency.
What is an FAA ACS code?
The FAA's Airman Certification Standards (ACS) break each certificate into Areas of Operation, Tasks, and specific Knowledge (K), Risk Management (R), and Skill (S) elements. Every knowledge-test question maps to one code like AA.V.A.K2. When you miss a question, your Airman Knowledge Test Report lists its code so you know exactly what to review.
Have a whole list of codes from your report? Paste them all into our free ACS code lookup to see every weak area at once — or browse the aviation glossary for plain-English definitions.