14 CFR 91.177 - Minimum altitudes for IFR operations.

Status message

There are 10 Updates appearing in the Federal Register for 14 CFR 91. View below or at eCFR (GPOAccess)
§ 91.177 Minimum altitudes for IFR operations.
(a) Operation of aircraft at minimum altitudes. Except when necessary for takeoff or landing, or unless otherwise authorized by the FAA, no person may operate an aircraft under IFR below—
(1) The applicable minimum altitudes prescribed in parts 95 and 97 of this chapter. However, if both a MEA and a MOCA are prescribed for a particular route or route segment, a person may operate an aircraft below the MEA down to, but not below, the MOCA, provided the applicable navigation signals are available. For aircraft using VOR for navigation, this applies only when the aircraft is within 22 nautical miles of that VOR (based on the reasonable estimate by the pilot operating the aircraft of that distance); or
(2) If no applicable minimum altitude is prescribed in parts 95 and 97 of this chapter, then—
(i) In the case of operations over an area designated as a mountainous area in part 95 of this chapter, an altitude of 2,000 feet above the highest obstacle within a horizontal distance of 4 nautical miles from the course to be flown; or
(ii) In any other case, an altitude of 1,000 feet above the highest obstacle within a horizontal distance of 4 nautical miles from the course to be flown.
(b) Climb. Climb to a higher minimum IFR altitude shall begin immediately after passing the point beyond which that minimum altitude applies, except that when ground obstructions intervene, the point beyond which that higher minimum altitude applies shall be crossed at or above the applicable MCA.
[Doc. No. 18334, 54 FR 34294, Aug. 18, 1989, as amended by Amdt. 91-296, 72 FR 31678, June 7, 2007; Amdt. 91-315, 75 FR 30690, June 2, 2010]

Title 14 published on 2014-01-01

The following are only the Rules published in the Federal Register after the published date of Title 14.

For a complete list of all Rules, Proposed Rules, and Notices view the Rulemaking tab.

  • 2014-07-25; vol. 79 # 143 - Friday, July 25, 2014
    1. 79 FR 43240 - Interpretation of the Special Rule for Model Aircraft
      GPO FDSys XML | Text
      DEPARTMENT OF TRANSPORTATION, Federal Aviation Administration
      Notice of interpretation with request for comment; Extension of comment period.
      The comment period for the notice of interpretation published June 25, 2014 (79 FR 36172), is extended. Comments must be received on or before September 23, 2014.
      14 CFR Part 91

This is a list of United States Code sections, Statutes at Large, Public Laws, and Presidential Documents, which provide rulemaking authority for this CFR Part.

This list is taken from the Parallel Table of Authorities and Rules provided by GPO [Government Printing Office].

It is not guaranteed to be accurate or up-to-date, though we do refresh the database weekly. More limitations on accuracy are described at the GPO site.


United States Code
U.S. Code: Title 49 - TRANSPORTATION

§ 106 - Federal Aviation Administration

§ 1155 - Aviation penalties

§ 40103 - Sovereignty and use of airspace

§ 40113 - Administrative

§ 40120 - Relationship to other laws

§ 44101 - Operation of aircraft

§ 44111 - Modifications in registration and recordation system for aircraft not providing air transportation

§ 44701 - General requirements

§ 44704 - Type certificates, production certificates, airworthiness certificates,,

§ 44709 - Amendments, modifications, suspensions, and revocations of certificates

§ 44711 - Prohibitions and exemption

§ 44712 - Emergency locator transmitters

§ 44715 - Controlling aircraft noise and sonic boom

§ 44716 - Collision avoidance systems

§ 44717 - Aging aircraft

§ 44722 - Aircraft operations in winter conditions

§ 46306 - Registration violations involving aircraft not providing air transportation

§ 46315 - Lighting violations involving transporting controlled substances by aircraft not providing air transportation

§ 46316 - General criminal penalty when specific penalty not provided

§ 46504 - Interference with flight crew members and attendants

§ 46506 - Application of certain criminal laws to acts on aircraft

§ 46507 - False information and threats

§ 47122 - Administrative

§ 47508 - Noise standards for air carriers and foreign air carriers providing foreign air transportation

§ 47528 - Prohibition on operating certain aircraft not complying with stage 3 noise levels

§ 47529 - Nonaddition rule

§ 47530 - Nonapplication of

§ 47531 - Penalties

§ 47534 - Prohibition on operating certain aircraft weighing 75,000 pounds or less not complying with stage 3 noise levels

Statutes at Large

Title 14 published on 2014-01-01

The following are ALL rules, proposed rules, and notices (chronologically) published in the Federal Register relating to 14 CFR 91 after this date.

  • 2014-07-25; vol. 79 # 143 - Friday, July 25, 2014
    1. 79 FR 43240 - Interpretation of the Special Rule for Model Aircraft
      GPO FDSys XML | Text
      DEPARTMENT OF TRANSPORTATION, Federal Aviation Administration
      Notice of interpretation with request for comment; Extension of comment period.
      The comment period for the notice of interpretation published June 25, 2014 (79 FR 36172), is extended. Comments must be received on or before September 23, 2014.
      14 CFR Part 91