14 CFR § 61.53 - Prohibition on operations during medical deficiency.

---
identifier: "/us/cfr/t14/s61.53"
source: "ecfr"
legal_status: "authoritative_unofficial"
title: "14 CFR § 61.53 - Prohibition on operations during medical deficiency."
title_number: 14
title_name: "Aeronautics and Space"
section_number: "61.53"
section_name: "Prohibition on operations during medical deficiency."
chapter_name: "FEDERAL AVIATION ADMINISTRATION, DEPARTMENT OF TRANSPORTATION"
subchapter_number: "D"
subchapter_name: "AIRMEN"
part_number: "61"
part_name: "CERTIFICATION: PILOTS, FLIGHT INSTRUCTORS, AND GROUND INSTRUCTORS"
positive_law: false
currency: "2026-04-05"
last_updated: "2026-04-05"
format_version: "1.1.0"
generator: "[email protected]"
authority: "49 U.S.C. 106(f), 40113, 44701-44703, 44707, 44709-44711, 44729, 44903, 45102-45103, 45301-45302."
regulatory_source: "Docket 25910, 62 FR 16298, Apr. 4, 1997, unless otherwise noted."
cfr_part: "61"
---


# 61.53 Prohibition on operations during medical deficiency.

(a) *Operations that require a medical certificate.* Except as provided for in paragraph (b) of this section, no person who holds a medical certificate issued under part 67 of this chapter may act as pilot in command, or in any other capacity as a required pilot flight crewmember, while that person:

(1) Knows or has reason to know of any medical condition that would make the person unable to meet the requirements for the medical certificate necessary for the pilot operation; or

(2) Is taking medication or receiving other treatment for a medical condition that results in the person being unable to meet the requirements for the medical certificate necessary for the pilot operation.

(b) *Operations that do not require a medical certificate.* For operations provided for in § 61.23(b) of this part, a person shall not act as pilot in command, or in any other capacity as a required pilot flight crewmember, while that person knows or has reason to know of any medical condition that would make the person unable to operate the aircraft in a safe manner.

(c) *Operations requiring a medical certificate or a U.S. driver's license.* For operations provided for in § 61.23(c), a person must meet the provisions of—

(1) Paragraph (a) of this section if that person holds a medical certificate issued under part 67 of this chapter and does not hold a U.S. driver's license.

(2) Paragraph (b) of this section if that person holds a U.S. driver's license.

[Docket 25910, 62 FR 16298, Apr. 4, 1997, as amended by Amdt. 61-110, 69 FR 44866, July 27, 2004; Amdt. 61-124, 74 FR 42550, Aug. 21, 2009]