Updated: Jan 7

What instruments must be installed and working on an airplane for it to be legal to fly in VFR conditions during the day?

Here's what you need to know.


Remember the acronym ATOMATOFLAMES.

A - Anti-Collision Lights

T - Tachometer

O - Oil Pressure Gauge

M - Manifold Pressure Gauge

For those aircraft with altitude engines.

A - Airspeed Indicator

T - Temperature Gauge

For those aircraft with liquid cooled engines.

O - Oil Temperature Gauge

For those aircraft with air cooled engines.

F - Fuel Quantity Gauges

L - Landing Gear Position Indicators

For those aircraft with retractable landing gear.

A - Altimeter

M - Magnetic Compass

E - Emergency Locator Transmitter (ELT)

S - Safety Belts

If any of these items are missing or inoperative, a pilot must ensure they are properly fixed, or obtain a special flight permit prior to beginning the flight.

Author - Nate Hodell

CFI/CFII/MEI/ATP - Creator of wifiCFI - Owner of Axiom Aviation Flight School.

This information is included in the Airworthiness Requirements Lessons on wifiCFI. Sign up today to watch videos, listen to podcasts, take lesson quizzes, join live webinars, print lesson quicktakes, and more by clicking this link >

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