FAR 91.3 and the Regulation That Makes You Captain

FAR 91.3 is one of the shortest regulations in the book and the most important one a pilot will ever read. Three sentences establish that you - not ATC, not your passenger, not the flight school - are directly responsible for and the final authority over your aircraft. Everything else in flight training builds on that foundation.

What Does “Directly Responsible” Actually Mean?

“Directly responsible” means the FAA starts every investigation by looking at the pilot in command. If you depart into weather you’re not equipped or rated to handle, that’s on you. If a passenger isn’t belted in when something goes wrong, that’s on you. Not the mechanic, not the dispatcher, not the lineman who gave you a thumbs up.

That responsibility also begins earlier than most pilots realize. It starts the moment you accept command of the aircraft - not at engine start, not at takeoff. Ground operations, preflight, taxi: the responsibility is continuous from that first moment of command.

What Does “Final Authority” Actually Give You?

“Final authority” means you can push back on ATC. At busy airports, this scenario plays out regularly: tower clears you to cross an active runway, you look down the field, and the aircraft on final doesn’t look right. The distance looks short, the speed looks high. You do not have to cross.

You can say “unable, holding short.” You can ask whether the aircraft on final is going around. FAR 91.3 gives you both the authority and the obligation to tell ATC you’re not comfortable with a clearance. Controllers work with radar and radio - you have eyes on the situation and authority the regulation explicitly grants you.

This is not license to ignore ATC without cause. The system runs on cooperation, and controllers are almost always right. But 91.3 is there for the moments when the picture in the cockpit is different from the picture at the facility.

Who Is Pilot in Command During Dual Instruction?

During a training flight with an instructor aboard, the flight instructor typically holds pilot in command authority and responsibility. The student is flying, but the instructor is responsible - which is why an instructor can legally log flight time even when not touching the controls.

When the student solos, that changes completely. The authority and responsibility shift entirely to the student the moment the instructor steps out of the airplane. No asterisk. No shared authority. That shift in understanding is part of what the solo is designed to create.

How Does FAR 91.3(b) Apply in Emergencies?

Paragraph B of FAR 91.3 is the most powerful tool a pilot holds: “In an in-flight emergency requiring immediate action, the pilot in command may deviate from any rule of this part to the extent necessary to meet that emergency.”

May deviate from any rule. Any.

If you lose an engine on departure and need to land on a road, you can do it. If you’re flying VFR and suddenly find yourself inside a cloud, you can climb to clear terrain. If a medical emergency requires landing at a notamed closed airport, you can land there. The regulations establish safety standards for normal operations. Paragraph B recognizes that emergencies are not normal operations.

This regulation exists to keep pilots from freezing up and trying to stay legally compliant while an emergency develops around them. Handle the emergency. Figure out the paperwork after.

A scenario more common than engine failure: you’re flying cross-country, VFR, not instrument rated, and weather moves in faster than forecast. You’ve got ten miles to the nearest airport and visibility is collapsing. That is an emergency. Paragraph B gives you the authority to declare it, tell ATC what’s happening, and do whatever you need to get the airplane on the ground. Don’t quietly try to work your way out of it. Declare it. Say the words - Mayday, Mayday, Mayday for life-threatening situations, Pan-Pan, Pan-Pan, Pan-Pan for urgent situations that haven’t turned critical yet.

What Happens After You Deviate Under 91.3(b)?

Paragraph C of FAR 91.3 states that a pilot who deviates shall, upon the request of the Administrator, send a written report of that deviation.

Notice what it does not say. It does not require an automatic report. The FAA can ask you to explain what happened, and if they ask, you provide a written explanation. Declaring an emergency and deviating is not automatically a violation or a certificate action. It is a legal exercise of authority the regulation explicitly grants you.

The NASA Aviation Safety Reporting System (ASRS) is the other piece of this. The ASRS is a voluntary incident reporting program that allows pilots to report errors, deviations, and incidents. Filing an ASRS report within 10 days of an event provides protection against FAA enforcement action, within limits. It’s not a blank check, but it’s a system designed to encourage honest reporting so the whole industry can learn without punishing pilots who self-report.

If you ever deviate from a regulation, make a significant error, or declare an emergency involving anything unusual: file the ASRS, be honest about what happened, and let the system work as designed. The FAA would rather receive a report than read an accident brief.

How Does the Checkride Test Pilot in Command Authority?

The Airman Certification Standards (ACS) require applicants to demonstrate understanding and application of pilot in command responsibility - not just the ability to recite the regulation. Designated Pilot Examiners (DPEs) are specifically trained to create scenarios that pressure applicants into poor decisions.

The examiner may simulate an impatient passenger pushing you to press on into deteriorating weather. They may issue an ATC clearance that feels uncomfortable just to see whether you comply without question. They’re watching how you respond to pressure, not just whether you can fly a maneuver.

Here’s what the examiner cannot do: legally order you to do something unsafe during the practical test. If a DPE gives an instruction that would compromise safety, saying “I’m not comfortable with that as pilot in command” is not a failure - it is the correct answer. A student who falls short on a maneuver but demonstrates sound command authority is showing the examiner exactly what the ACS wants to see.

Key Takeaways

• FAR 91.3 is three sentences. Know the full text the way you know your name: directly responsible, final authority, and the authority to deviate in an emergency.
• Practice saying “unable.” New pilots often feel they cannot decline an ATC clearance. You can - and sometimes you must.
• Declare emergencies early. The authority paragraph B grants does nothing if you invoke it too late. Don’t wait for the situation to become unmanageable.
• Know the ASRS. If you ever deviate from a regulation or make a significant error, file within 10 days of the event.
• Be the pilot in command on every flight. Passengers don’t navigate decisions that are yours to make. Outside pressure doesn’t override your judgment. The regulation put the authority in your hands because that’s where it belongs.