Airman Certification Standards
ACS AI.X.H
Secondary Stall Demonstration (ASEL, ASES)
Knowledge
Aerodynamics of secondary stalls.
Flight situations where secondary stalls may occur. 73
Recognition of a secondary stall.
Entry procedure and minimum entry altitude.
Recovery procedure.
Common errors related to this Task.
Risk Management
Stall recovery procedure.
Effect of environmental elements on airplane performance related to cross-controlled stalls (e.g., turbulence, microbursts, and high-density altitude).
Collision hazards.
Aircraft limitations.
Distractions, task prioritization, loss of situational awareness, or disorientation.
Skill
Clear the area.
Select an entry altitude that allows the Task to be completed no lower than 3,000 feet above ground level (AGL).
Enter a stall in a specified configuration and exceed the critical angle of attach a second time during the recovery.
Recover promptly and appropriately after a secondary stall occurs.
Describe and demonstrate conditions that lead to a secondary stall for future avoidance.
Analyze and correct common errors related to this Task.
Retrieved from ecfr.gov on July 17, 2026.