Title: Describe proficiency-check requirements.
Course: Aircraft Pilot Training I (20053-I) > Section: Exploring Regulations

Description should include the following:

- No certificate holder may use any person nor may any person serve as a required pilot flight crewmember unless that person has satisfactorily completed either a proficiency check, or an approved simulator course of training under §121.409, as follows:
  - For a pilot in command, a proficiency check within the preceding twelve calendar months and, in addition, within the preceding six calendar months, either a proficiency check or the simulator training.

- Refer to Sec. 121.441, Proficiency Checks, for more information.

PLT449