---
kind: "section"
citation: "14 C.F.R. § 63.35"
title: "14"
number: "63.35"
heading: "Knowledge requirements."
url: "https://uscodex.org/cfr/14/63.35"
---

# §63.35. Knowledge requirements.

- (a) An applicant for a flight engineer certificate must pass a written test on the following:
  - (1) **The regulations of this chapter that apply to the duties of a flight engineer.**
  - (2) **The theory of flight and aerodynamics.**
  - (3) **Basic meteorology with respect to engine operations.**
  - (4) **Center of gravity computations.**
- (b) An applicant for the original or additional issue of a flight engineer class rating must pass a written test for that airplane class on the following:
  - (1) **Preflight.**
  - (2) **Airplane equipment.**
  - (3) **Airplane systems.**
  - (4) **Airplane loading.**
  - (5) **Airplane procedures and engine operations with respect to limitations.**
  - (6) **Normal operating procedures.**
  - (7) **Emergency procedures.**
  - (8) **Mathematical computation of engine operations and fuel consumption.**
- (c) Before taking the written tests prescribed in paragraphs [(a)](#a) and [(b)](#b) of this section, an applicant for a flight engineer certificate must present satisfactory evidence of having completed one of the experience requirements of [§ 63.37](/cfr/14/63.37.md). However, the applicant may take the written tests before acquiring the flight training required by [§ 63.37](/cfr/14/63.37.md).
- (d) An applicant for a flight engineer certificate or rating must have passed the written tests required by paragraphs [(a)](#a) and [(b)](#b) of this section since the beginning of the 24th calendar month before the month in which the flight is taken. However, this limitation does not apply to an applicant for a flight engineer certificate or rating if—
  - (1) **The applicant—**
    - (i) Within the period ending 24 calendar months after the month in which the applicant passed the written test, is employed as a flight crewmember or mechanic by a U.S. air carrier or commercial operator operating either under [part 121](/cfr/14/part121.md) or as a commuter air carrier under [part 135](/cfr/14/part135.md) (as defined in [part 298 of this title](/cfr/14/part298.md)) and is employed by such a certificate holder at the time of the flight test;
    - (ii) If employed as a flight crewmember, has completed initial training, and, if appropriate, transition or upgrade training; and
    - (iii) Meets the recurrent training requirements of the applicable part or, for mechanics, meets the recency of experience requirements of [part 65](/cfr/14/part65.md) of this chapter;
  - (2) Within the period ending 24 calendar months after the month in which the applicant passed the written test, the applicant participated in a flight engineer or maintenance training program of a U.S. scheduled military air transportation service and is currently participating in that program; or
  - (3) An applicant is eligible to take a practical test for a flight engineer certificate or rating under this part with an expired written test report in accordance with [§ 61.40](/cfr/14/61.40.md) of this chapter.
- (e) An air carrier or commercial operator with an approved training program under [part 121](/cfr/14/part121.md) of this chapter may, when authorized by the Administrator, provide as part of that program a written test that it may administer to satisfy the test required for an additional rating under [paragraph (b)](#b) of this section.

## Notes

### Amendments

[Docket 1179, 27 FR 7969, Aug. 10, 1962, as amended by Amdt. 63-17, 40 FR 32830, Aug. 5, 1975; Docket 63-21, 47 FR 13316, Mar. 29, 1982; Docket FAA-2023-0825, Amdt. 63-47, 89 FR 80053, Oct. 1, 2024]

### Authority

Authority: Secs. 313(a), 601, and 602, Federal Aviation Act of 1958; 49 U.S.C. 1354, 1421, 1422.

### Source

Source: Docket 6458, 30 FR 14559, Nov. 23, 1965, unless otherwise noted.

### Authority

Authority: 49 U.S.C. 106(f), 40113, 44701-44703, 44707, 44709-44711, 45102-45103, 45301-45302.

### Amendments

[Docket 1179, 27 FR 7969, Aug. 10, 1962, as amended by Amdt. 63-17, 40 FR 32830, Aug. 5, 1975; Docket 63-21, 47 FR 13316, Mar. 29, 1982; Docket FAA-2023-0825, Amdt. 63-47, 89 FR 80053, Oct. 1, 2024]