Emergency Authority of Pilot in Command: FAR 91.3 Explained

Complete guide to emergency authority of PIC under §91.3. Covers what constitutes an emergency, declaring an emergency with ATC, deviation from ATC clearance, NTSB reporting, and FAA enforcement after emergencies.

April 2026·7 min read read·Faraim Editorial

KEY POINT

Section 91.3 gives pilots sweeping authority to deviate from any regulation in an emergency. But what counts as an emergency? And what happens after? This guide covers the full scope of PIC emergency authority.

14 CFR §91.3 is one of the most powerful provisions in the entire Federal Aviation Regulations. It vests the pilot in command with final authority over the aircraft, including the authority to deviate from any rule to meet an emergency. Understanding this regulation — both its power and its limits — is essential for every pilot.

The Text of §91.3

§91.3(a): The pilot in command of an aircraft is directly responsible for, and is the final authority as to, the operation of that aircraft.

§91.3(b): 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.

§91.3(c): Each pilot in command who deviates from a rule under paragraph (b) shall, upon the request of the Administrator, send a written report of that deviation to the Administrator.

What Constitutes an Emergency?

The FAA has never precisely defined 'emergency' in the regulations. Courts and NTSB have broadly interpreted it to include any situation that requires immediate action to preserve the safety of the aircraft and its occupants. This includes:

Engine failures and partial power losses
Fire on board (actual or suspected)
Loss of navigation capability in IMC
Medical emergency of a passenger
Structural damage
Fuel exhaustion scenarios where immediate landing is necessary
Control malfunctions
Loss of communication in certain circumstances

Declaring an Emergency with ATC

You are never required to declare an emergency — but you should whenever the situation calls for it. Declaring an emergency (via 7700 transponder squawk, radio call, or both) activates ATC's emergency response: priority handling, direct routing, crash/fire/rescue notification, and removal of traffic conflicts.

The words to use: 'Mayday, Mayday, Mayday' for life-threatening emergency, or 'Pan-Pan, Pan-Pan, Pan-Pan' for urgency without immediate life threat. Follow with your aircraft call sign, nature of emergency, and position.

Can the FAA Take Action After an Emergency?

This is the question every pilot worries about. The short answer: the FAA can investigate any emergency, but it will almost never take certificate action against a pilot who declares an emergency and handles it professionally.

The NASA Aviation Safety Reporting System (ASRS) provides a degree of protection. If you file an ASRS report within 10 days of an incident, the FAA may not use it as evidence in a certificate action — and it demonstrates good faith. The report should be filed immediately after any emergency deviation.

Landing at the Wrong Airport

Pilots who land at unintended airports (a surprisingly common occurrence) are generally not subjected to enforcement if the landing was inadvertent rather than negligent. The FAA's standard is whether the deviation was necessary given the circumstances the pilot reasonably believed existed. An engine problem forcing you down at the nearest runway? Clean bill of health. Deliberately landing at a military base because it was closer and you were low on fuel without an actual emergency? Different story.

The practical rule: if you're in doubt whether your situation rises to an emergency, declare one. You can always cancel an emergency declaration after landing if the situation resolved. There's no penalty for declaring an emergency that turned out to be manageable — and potentially severe consequences for not declaring one that wasn't.