A stall occurs when the smooth airflow over the airplane's wing is disrupted, and the lift degenerates rapidly. This is caused when the wing exceeds its critical angle of attack. This can occur at any airspeed, in any attitude, with any power setting. The objectives in performing intentional stalls are to familiarize the pilot with the conditions that produce stalls, to assist in recognizing an approaching stall, and to develop the habit of taking prompt preventive or corrective action.
AC 61-67C Chapters 1-3
AFH Ch-04 (08) Full Stalls, Power-Off
Cessna SOPM 2-34 Power-Off Stall
AC 61-67C Chapters 1-3
AFH Ch-04 (09) Full Stalls, Power-On
Cessna SOPM 2-36 Power-On Stall
Private Pilot ACS Page 41 Task B. Power-Off Stalls
Private Pilot ACS Page 42 Task C. Power-On Stalls