Airman Certification Standards

ACS AI.II.P

One Engine Inoperative (OEI) Performance (AMEL, AMES)

This reproduces published FAA reference text for study. It does not replace the current official FAA publication or regulation.

Knowledge

Proficient use of appropriate performance charts, tables, graphs, or other data to determine airplane performance and limitations for all phases of flight.

Effects of exceeding limitations.

Effects of atmospheric conditions on performance.

Factors to be considered to determine required performance is within the airplane's single and multiengine cababilities.

Aerodynamics of OEI operation including:

K5a

a. Critical engine

K5b

b. Effects of bank angle on VMC

K5c

c. Zero side slip

K5d

d. Reasons for loss of directional control

The relationship between minimum control speed (VMC) and stall speed and the effect of density altitude on that relationship.

How to determine the best course of action after an engine failure.

Risk Management

Exceeding the critical angle of attack.

Loss of directional control. 22

Flying over terrain that exceeds the single engine service ceiling.

Fuel management.

Skill

Compute the expected single engine climb performance. 23

Retrieved from ecfr.gov on July 17, 2026.