Pan-Pan - The Radio Call Every Pilot Knows and Almost Nobody Makes

Pan-Pan and Mayday are the international urgency and distress calls available to every pilot on every flight. They are also two of the most underused tools in general aviation. FAR 91.3 grants the pilot in command authority to deviate from any rule during an emergency, and no pilot has ever lost a certificate for declaring when the situation turned out to be manageable. The skill isn’t knowing these calls exist - it’s making them early enough to matter.

Why Pilots Don’t Make the Call

When something goes wrong in the cockpit, the immediate response usually isn’t panic. It’s negotiation. The brain starts bargaining: It’ll smooth out. Other pilots handle this without calling anyone. I don’t want to waste ATC’s time. I’ll feel stupid if I declare and it turns out to be nothing.

That internal negotiation has a body count.

The NTSB accident database is full of flights that ended badly not because the pilot lacked options, but because the pilot waited too long to use them. There is almost always a window - sometimes a wide one - where the right call on the radio would have changed the outcome entirely. That window closes while the pilot is still bargaining with themselves.

What Is the Difference Between Mayday and Pan-Pan?

Mayday is the international distress signal. It signals grave and imminent danger requiring immediate assistance - engine failure, cockpit fire, loss of control, an incapacitated pilot. Use it when something is going to end badly in the next few minutes without help.

Pan-Pan is the urgency call. Something is wrong, but you are not in immediate peril. Fuel lower than planned. An instrument failure that degrades navigation. A passenger needing medical attention on the ground. Weather you are not confident you can handle. Any abnormality that doesn’t fit a checklist and requires attention now, not eventually.

Most pilots know Mayday. Far fewer reach for Pan-Pan. That is a mistake. Pan-Pan opens a line of communication with ATC without requiring you to be on fire.

When Should I Declare Pan-Pan vs. Mayday?

The threshold question is: grave and imminent danger, or serious concern requiring attention? That single distinction separates Mayday from Pan-Pan.

If the engine quits, declare Mayday. If the engine is running rough but still making power and you have airports in range, declare Pan-Pan. If you are VFR and the ceiling is dropping toward you, declare Pan-Pan now - before you enter the clouds. If you are already in IMC without the training or currency for it, declare Mayday. The same deteriorating situation can cross from one threshold to the other quickly, and it almost always crosses in the wrong direction the longer you wait.

One useful rule: if any action you are considering requires you to burn more options before you call, make the call first.

Scenario: Fuel State

You are two hours into a cross-country. Fuel burn is higher than planned. Your gauges - which the regulations only require to be accurate when they read empty - are showing less than expected. You calculate 45 minutes of fuel remaining, and your destination is an hour away. There is an airport 17 miles to your left.

Watch what happens next. You run the math five different ways. You tell yourself the gauges read low. You tell yourself you always have a little extra. The destination has gravity, and it pulls you forward. This is plan continuation bias, and it is one of the most documented contributors to fuel exhaustion accidents.

The correct action is a Pan-Pan call. Pick up the mic:

“Denver Center, Cessna Four Five Seven Papa Alpha, Pan-Pan, Pan-Pan, Pan-Pan, declaring urgency, uncertain fuel state, request immediate routing to nearest suitable airport.”

That’s the whole call. Pan-Pan is said three times because that is the international convention. Then your call sign. Then the nature of your urgency. Then what you need.

What happens next is what pilots don’t fully appreciate until they’ve been through it. ATC starts working for you. They vector you to that airport 17 miles left. They ask fuel on board and do math you can’t do while flying. They call ahead so services are standing by. In 30 seconds, you have a team. You have been flying alone this entire flight.

Scenario: Deteriorating VFR Weather

You are VFR, 150 hours in the logbook, flying home from a fly-in. The briefing said scattered at 3,000 feet. The layer ahead is dropping, and the gray is closing in from the left. You are at 2,500 feet. You are not in the clouds yet. You are not in danger yet.

The NTSB data on VFR pilots who continue into instrument meteorological conditions is specific: the average time from inadvertent IMC entry to loss of control is approximately 178 seconds - roughly three minutes. Not because those pilots weren’t capable. Because the vestibular system lies, and without the scan, procedures, and practice that instrument training provides, spatial disorientation develops faster than most pilots expect.

The Airman Certification Standards for the private pilot expect you to recognize and manage deteriorating meteorological conditions. This is exactly that moment.

Make the call while you still have altitude, visibility, and a radio:

“Seattle Approach, Skyhawk Six Three Papa Golf, Pan-Pan, Pan-Pan, Pan-Pan, VFR pilot encountering deteriorating conditions, requesting immediate vectors to nearest airport with VFR weather.”

ATC can see the radar picture. They can find you a field sitting under clear skies 12 miles away and give you a heading, an altitude, and someone to talk to while you fly it. The pilot who waits until they are already in the clouds has converted a Pan-Pan into a Mayday - and is now managing a developing graveyard spiral instead of flying a heading.

Scenario: Engine Roughness

When something in the engine sounds or feels different, the job is not to diagnose it in the air. The job is to start moving toward the ground while you still have options.

Run the engine roughness checklist - mixture, carb heat, fuel selector, magnetos - but run it while you are already looking at airport options below you and descending. Don’t wait for the checklist to fix it before you start thinking about where you’d land if it doesn’t.

If the roughness responds to carb heat and smooths out, consider landing at the nearest suitable airport and having someone inspect the system before continuing. That is not overreacting. That is what professionals do.

If it doesn’t smooth out, pick up the mic. Mayday or Pan-Pan depends on where you are: if you have an airport in glide range and the engine is still producing power, even rough power, that is a Pan-Pan. If the engine quits, that is a Mayday. If you are over terrain with no options and the roughness is worsening, that is also a Mayday.

How to Decide in the Moment: A Four-Question Framework

1. Emergency or urgency? Grave and imminent danger, or serious concern? That determines Mayday versus Pan-Pan.

2. How many options am I burning through? The passage of time in these scenarios is not neutral. Fuel burns. Ceilings drop. Engines degrade. The question is not whether to call eventually - it’s whether you are calling soon enough.

3. What information do I need that I don’t have? ATC can provide nearest airports, current weather, the radar picture, relay to a mechanic, and call ahead to services. Ask. They help.

4. Would I be embarrassed to tell my instructor I made this call? If the answer is yes - if calling feels like admitting weakness or wasting someone’s time - that feeling is the one to watch. That feeling is what gets pilots into trouble.

What to Actually Say on the Radio

The distress call format is consistent internationally:

1. Mayday, Mayday, Mayday (or Pan-Pan, Pan-Pan, Pan-Pan)
2. Your aircraft call sign
3. Your position - if uncertain, say “approximately” and give the nearest fix with rough distance and direction
4. The nature of your emergency or urgency
5. What you need
6. Souls on board and fuel remaining, if you can get to it

A complete Mayday call sounds like this:

“Mayday, Mayday, Mayday, Piper Seven Seven Six November, ten miles southwest of the Salem VOR, engine failure, declaring emergency, requesting immediate vectors to Salem, two souls on board, forty minutes fuel.”

If ATC does not respond on your current frequency, try 121.5 MHz - the universal emergency frequency monitored by ATC facilities, military installations, and many aircraft. Squawk 7700 on your transponder. That code appears immediately on radar screens and alerts every controller looking at that airspace.

Pre-Deciding Your Thresholds Before You Fly

The most effective thing you can do is decide your personal minimums before you start the engine. Write them on your kneeboard. Examples:

• If fuel state drops to 45 minutes remaining, I declare.
• If VFR ceiling drops below 2,000 feet and I’m not instrument current, I’m on the radio.
• If any instrument fails in a way that degrades navigation, I’m declaring.

The pilot who has decided ahead of time what their threshold is does not have to make that decision again under pressure at altitude. You made the call in the calm. You are just executing it in the air.

What Actually Happens After You Declare

FAR 91.3 states that the FAA may request a written report if you deviated from a regulation during an emergency. That is the full extent of it. No fine. No certificate action. No enforcement for asking for help.

What does end careers - and lives - is the inverse. VFR pilots who descended into IMC because they didn’t want to admit they were lost. Pilots who landed gear-up because the problem didn’t seem serious enough to declare. Pilots who ran out of fuel short of the airport because they were certain they had enough.

The fear of looking bad is one of the most dangerous forces in aviation. The antidote is deciding, before you fly, that if it gets to a specific point, you ask for help.

Key Takeaways

• Pan-Pan signals urgency; Mayday signals grave and imminent danger. Both are underused. Pan-Pan, in particular, opens ATC support before a situation becomes critical.
• FAR 91.3 gives the PIC authority to deviate from any rule in an emergency. There is no regulatory penalty for declaring when the situation turned out to be manageable.
• Say Pan-Pan or Mayday three times, then call sign, position, nature of the problem, and what you need. On no response, try 121.5 MHz and squawk 7700.
• VFR-into-IMC produces loss of control in an average of 178 seconds. The Pan-Pan call belongs before you enter the clouds, not after.
• Pre-decide your personal minimums on the ground. Written thresholds remove the in-cockpit negotiation that delays the call.