Private pilot privileges and limitations: Second in command of aircraft requiring more than one pilot.
CFR · 2024-01-01 · US · Title 14
Except as provided in § 61.113 of this part, no private pilot may, for compensation or hire, act as second in command of an aircraft that is type certificated for more than one pilot, nor may that pilot act as second in command of
official document · source cfr-2024 · id 14:§ 61.117