FAR ninety-one point three and the emergency authority that lets the pilot in command break any rule to save the airplane
FAR 91.3 gives the pilot in command final authority to deviate from any rule in an emergency—here's what it really means and how to use it.
Federal Aviation Regulation 91.3 grants the pilot in command final authority over the aircraft and the right to deviate from any rule in Part 91 during an in-flight emergency, to the extent required to handle that emergency. It is the single most powerful provision in the regulations: when survival is on the line, the rulebook bends to the human in the left seat. Understanding it before you need it can be the difference between a safe landing and a fatal hesitation.
What Does FAR 91.3 Actually Say?
FAR 91.3 has three short parts, and the exact wording matters.
Part (a) states that the pilot in command of an aircraft is directly responsible for, and is the final authority as to, the operation of that aircraft. Not the tower. Not your instructor on the radio. Not dispatch. You.
Part (b) is the heart of it: in an in-flight emergency requiring immediate action, the pilot in command may deviate from any rule of this part to the extent required to meet that emergency.
Part (c) is the part most pilots forget: a pilot who deviates under this section shall, upon the request of the Administrator, send a written report of that deviation. Note the words “upon request”—it is not automatic.
How Much Authority Does 91.3 Really Give You?
A lot. The phrase “any rule” means exactly that. In a genuine emergency, you can descend through a cloud layer you’re not rated for, land the wrong way on a runway, bust an assigned altitude, transit Class Bravo without a clearance, or exceed an airspeed limit. If meeting the emergency genuinely requires it, the regulation permits it.
This exists for a reason. Many newer pilots fly as if the regulations are a cage—and most of the time, that’s a healthy instinct, because the regs were written in blood. But that mindset has a dangerous failure mode. When the engine quits or the weather closes in, a pilot who has spent 300 hours never breaking a rule can freeze, still trying to comply with an assigned heading or altitude when the legal thing is no longer the safe thing.
FAR 91.3 tells you, in writing and signed by the federal government, that you are not a passenger in the regulatory system. You are the final authority.
When Should I Deviate From a Rule or Clearance?
Picture the classic scenario: a Cessna at 4,000 feet, engine running rough and losing power. The nearest pavement is directly below you, but it’s the wrong direction—into a 12-knot tailwind—and the tower wants you to enter a left base for the favored runway, three miles out.
A pilot who doesn’t truly understand 91.3 argues with himself. Tower said the other runway. I’d be landing downwind. That’s not the published procedure. While he debates, the engine quits for real, and now he’s gliding into trees with no options left.
A pilot who understands 91.3 keys the mike, says “declaring an emergency,” and turns for the runway under his nose—downwind or not. A rough-running engine that might quit in the next sixty seconds is precisely the in-flight emergency the regulation was written for. He deviates to the extent required, puts it on the closest usable surface, and lives.
Will Declaring an Emergency Get Me Violated?
This is the fear that kills people, because it makes pilots hesitate at the exact moment hesitation costs the most.
Declaring an emergency is not an admission of guilt. It is a tool the system built for you. Controllers say it repeatedly at safety seminars: they would rather you declare and not need it than need it and not declare. When you say the word, you move to the front of the line, other traffic gets moved, equipment rolls, and the entire system reorients to help you. That is the point.
As for the written report in Part (c): it is only required upon the request of the Administrator. It is not automatic, and in the vast majority of emergencies no report is ever requested—you simply get down safely and go home. Even when a report is requested, it is a description of what happened and why. If your actions were a reasonable response to a genuine emergency, 91.3 is your protection, not your trap.
What Are the Limits of Emergency Authority?
The limiting phrase is “to the extent required.” FAR 91.3 is not a license to do whatever you feel like—it is permission to do what the emergency genuinely demands. You break the tailwind rule because the engine is failing; you don’t then do a barrel roll on the way down. Deviate as far as you need to, and no further. That is the standard a reasonable pilot—and a reviewing official—will hold you to.
How Do I Apply 91.3 in the Cockpit?
Carry these four points with you:
- Know the authority cold, before you need it. You won’t have time to look it up at 4,000 feet with a sick engine. Internalize it now: you are the final authority, and in an emergency you may deviate from any rule to the extent required.
- Use the word. Say “declaring an emergency.” If you’re not quite there but things are getting uncomfortable, use “pan-pan, pan-pan, pan-pan,” which signals urgency without immediate danger. Both open doors. Neither is a confession.
- Respect “to the extent required.” Deviate only as far as the situation demands.
- Fly the airplane first. Aviate, navigate, communicate. 91.3 doesn’t change that order—it frees you, once you’re flying the airplane, to act without arguing with the rulebook.
What Will a Checkride Examiner Expect?
When the examiner asks about emergency authority, they don’t want the reg number recited like a robot. They want to hear that you understand you are the final authority, and that you would not let a clearance, a rule, or the fear of a phone call stop you from keeping the airplane and its occupants alive. The Airman Certification Standards, under the privileges and limitations of a pilot certificate, expect you to know the difference between your everyday duty to follow the rules and your emergency authority to set them aside—and to know when each applies.
Key Takeaways
- FAR 91.3 makes the pilot in command the final authority over the operation of the aircraft—not ATC, not an instructor, not dispatch.
- In an in-flight emergency, you may deviate from any Part 91 rule “to the extent required” to meet that emergency.
- Declaring an emergency is not an admission of guilt; it moves you to the front of the line and brings the whole system to your aid.
- A written report is required only upon the Administrator’s request—it is not automatic, and reasonable actions in a genuine emergency are protected.
- Emergency authority is bounded by “to the extent required”: do what the situation demands, and no more.
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