EASA requirements: -
(A) abandoned take-off;
(B) engine failure after take-off;
(C) mislanding and go-around;
(D) missed approach.
Additional reading
FAA Airplane Flying Manual
Disclaimer: The material presented in these YouTube videos should not be used in place of actual ground or flight instruction. Consult a certified flight instructor before attempting to conduct any flight maneuvers.
The following training videos supplement the flight training syllabus in the Flying Training Manual
Emergency Descent - Level 2
Emergency Descent