Airman Certification Standards
ACS CH.II.C
Powerplant Starting and Rotor Engagement
This reproduces published FAA reference text for study. It does not replace the current official FAA publication or regulation.
Knowledge
K1
Starting under various conditions.
K2
Starting procedures, including the use of external power if applicable.
K3
Limitations associated with starting.
K4
Conditions leading to and procedures for an aborted start.
Risk Management
R1
Rotor engagement, if applicable.
R2
Use of external power unit.
R3
Limitations during starting.
Skill
S1
Position the helicopter properly considering structures, surface conditions, other aircraft, wind, and the safety of nearby persons and property. 12
S2
Use flight control frictions, if required.
S3
Complete the appropriate checklist(s).
S4
Engage and manage the rotor system, as appropriate.
Retrieved from ecfr.gov on July 17, 2026.