14 C.F.R. § 63.41 Retesting after failure.
Title 14 - Aeronautics and Space
An applicant for a flight engineer certificate who fails a written test or practical test for that certificate may apply for retesting— (a) After 30 days after the date he failed that test; or (b) After he has received additional practice or instruction (flight, synthetic trainer, or ground training, or any combination thereof) that is necessary, in the opinion of the Administrator or the applicant's instructor (if the Administrator has authorized him to determine the additional instruction necessary) to prepare the applicant for retesting.
Title 14: Aeronautics and Space
PART 63—CERTIFICATION: FLIGHT CREWMEMBERS OTHER THAN PILOTS
Subpart B—Flight Engineers
§ 63.41 Retesting after failure.
