Airman Certification Standards
ACS PA.IV.M
Forward Slip to a Landing (ASEL, ASES)
Knowledge
Concepts of energy management during a forward slip approach.
Effects of atmospheric conditions, including wind, on approach and landing performance.
Wind correction techniques during forward slip.
When and why a forward slip approach is used during an approach.
Risk Management
Selection of runway/landing surface, approach path, and touchdown area based on pilot capability, aircraft performance and limitations, available distance, and wind.
Effects of: Private Pilot for Airplane Category ACS (FAA-S-ACS-6C)34
a. Crosswind
b. Windshear
d. Wake turbulence
e. Landing surface/condition
Planning for:
a. Rejected landing and go-around
b. Land and hold short operations (LAHSO)
Collision hazards.
Low altitude maneuvering, including stall, spin, or controlled flight into terrain (CFIT).
Distractions, task prioritization, loss of situational awareness, or disorientation.
Forward slip operations, including fuel flowage, tail stalls with flaps, and airspeed control.
Surface contact with the airplane’s longitudinal axis misaligned.
Unstable approach.
Skill
Complete the appropriate checklist(s).
Make radio calls as appropriate.
Plan and follow a flightpath to the selected landing area considering altitude, wind, terrain, and obstructions.
Select the most suitable touchdown point based on wind, landing surface, obstructions, and airplane limitations.
Position airplane on downwind leg, parallel to landing runway or selected landing surface.
Configure the airplane correctly.
As necessary, correlate crosswind with direction of forward slip and transition to side slip before touchdown.
Touch down at a proper pitch attitude, within 400 feet beyond or on the specified point, with no side drift, and with the airplane’s longitudinal axis aligned with and over the runway center/landing path.
Maintain a ground track aligned with the runway center/landing path.
Retrieved from ecfr.gov on July 17, 2026.