Definition
Flight level
A level of constant atmospheric pressure related to a reference datum of 29.92 inches of mercury. Each is stated in three digits that represent hundreds of feet. For example, flight level (FL) 250 represents a barometric altimeter indication of 25,000 feet; FL 255, an indication of 25,500 feet.
- See: ICAO term FLIGHT LEVEL
Source: FAA Pilot/Controller Glossary (verbatim from the Federal Aviation Regulations).
Where This Term Is Used
- 14 CFR § 91.179 — § 91.179 IFR cruising altitude or flight level.
- 14 CFR § 91.159 — § 91.159 VFR cruising altitude or flight level.
- 14 CFR § 91.1605 — § 91.1605 Special Federal Aviation Regulation No. 77—Prohibition Against Certain Flights in the Baghdad Flight Information Region (FIR) (ORBB).
- 14 CFR § 91.1613 — § 91.1613 Special Federal Aviation Regulation No. 107—Prohibition Against Certain Flights in the Territory and Airspace of Somalia.
- 14 CFR § 91.1619 — § 91.1619 Special Federal Aviation Regulation No. 119—Prohibition Against Certain Flights in the Kabul Flight Information Region (FIR) (OAKX).
- 14 CFR § 91.1103 — § 91.1103 Pilots: Initial, transition, upgrade, requalification, and differences flight training.
- 14 CFR § 91.883 — § 91.883 Special flight authorizations for jet airplanes weighing 75,000 pounds or less.
- 14 CFR § 91.858 — § 91.858 Special flight authorizations for non-revenue Stage 2 operations.
- 14 CFR § 91.859 — § 91.859 Modification to meet Stage 3, Stage 4, or Stage 5 noise levels.
- 14 CFR § 91.326 — § 91.326 Exception to operating certain aircraft for the purposes of flight training, flightcrew member checking, or flightcrew member testing.
- 14 CFR § 91.176 — § 91.176 Straight-in landing operations below DA/DH or MDA using an enhanced flight vision system (EFVS) under IFR.
- 14 CFR § 91.153 — § 91.153 VFR flight plan: Information required.
- 14 CFR § 91.144 — § 91.144 Temporary restriction on flight operations during abnormally high barometric pressure conditions.
- 14 CFR § 91.905 — § 91.905 List of rules subject to waivers.
- 14 CFR § 91.185 — § 91.185 IFR operations: Two-way radio communications failure.
- 14 CFR § 91.211 — § 91.211 Supplemental oxygen.
- 14 CFR § 91.121 — § 91.121 Altimeter settings.
- 14 CFR § 91.1705 — § 91.1705 Required pilot training.
- 14 CFR § 91.1707 — § 91.1707 Training program hours.
- 14 CFR § 91.1035 — § 91.1035 Passenger awareness.
- 14 CFR § 91.313 — § 91.313 Restricted category civil aircraft: Operating limitations.
- 14 CFR § 91.227 — § 91.227 Automatic Dependent Surveillance-Broadcast (ADS-B) Out equipment performance requirements.
- 14 CFR § 91.219 — § 91.219 Altitude alerting system or device: Turbojet-powered civil airplanes.
- 14 CFR § 91.217 — § 91.217 Data correspondence between automatically reported pressure altitude data and the pilot’s altitude reference.
- 14 CFR § 91.145 — § 91.145 Management of aircraft operations in the vicinity of aerial demonstrations and major sporting events.
- 14 CFR § 91.139 — § 91.139 Emergency air traffic rules.
26 sections reference this term in their FAR Decoded content.