The Pan-Pan Call, the Urgency Phrase Every Pilot Trains But Rarely Transmits, and the Decision That Has to Be Made Before the Oil Pressure Moves Any Further

When your engine starts running rough and the oil pressure is trending down, the question isn’t whether to call - it’s which call to make and exactly what to say. Mayday signals immediate, life-threatening danger. Pan-Pan signals a serious situation that hasn’t yet crossed into imminent peril. Both unlock the full resources of the air traffic control system, and both exist because pilots need help before things become catastrophic.

Where Do the Words “Mayday” and “Pan-Pan” Come From?

Both terms trace to French, which reflects aviation’s early history.

Mayday derives from the French phrase m’aidez - help me. Frederick Stanley Mockford, a radio officer at Croydon Airport in England, proposed it as an international distress signal in 1923. His reasoning was practical: most radio traffic at Croydon moved between England and France, so a word rooted in French would be understood on both sides of the Channel. By 1948, the International Telecommunication Union had codified Mayday as the global standard distress call.

Pan-Pan also comes from French - from the word for breakdown or mechanical failure. Said three times, it signals urgency: a serious situation requiring attention, but not one that has crossed into immediate, imminent danger.

What’s the Difference Between Distress and Urgency?

The Aeronautical Information Manual defines both precisely.

Distress is a condition of being threatened by serious and imminent danger that requires immediate assistance. Urgency is a condition concerning the safety of an aircraft or person that does not require immediate assistance.

The operative words are imminent and immediate. Mayday is for when the clock is running and you need resources moving right now. Pan-Pan is for when you have a real problem that exceeds normal handling, you want priority attention, but you still have options and time.

How Do I Know Whether to Call Mayday or Pan-Pan?

Concrete scenarios make the distinction easier to apply.

Call Mayday when:

• Your engine has quit completely and you are selecting a field
• A passenger is unconscious and you need to land immediately with an ambulance at the ramp
• You are lost and your fuel gauge is in the red with no certainty of reaching an airport

Call Pan-Pan when:

• Your engine is running rough and oil pressure is dropping, but you still have options
• You are lost with a healthy fuel state and need radar vectors to a known fix
• A door won’t latch and you want to return to the airport with priority handling

A Pan-Pan can become a Mayday as the situation evolves - that’s expected. You start the call where you are, not where you might be in ten minutes.

The phrase to keep: declare early, downgrade later. If you are unsure whether the situation warrants Pan-Pan, make the call. If it resolves, you tell ATC you are canceling the urgency. The system is designed for exactly that. What it cannot handle is the pilot who never called at all.

What Are the Exact Words to Use?

Both Mayday and Pan-Pan follow the same structure. Say the signal word three times - this cuts through normal radio traffic and gives any controller or nearby pilot time to recognize that what follows is not routine.

After the three-peat, provide in order:

1. The facility you’re calling (or any station if unknown)
2. Your aircraft identification
3. The nature of your situation
4. Your intentions
5. Your position
6. Your altitude
7. Souls on board
8. Fuel remaining
9. Any other immediately relevant information

A Pan-Pan call might sound like this:

Pan-Pan, Pan-Pan, Pan-Pan. Kansas City Center, Cessna two six four papa foxtrot, Pan-Pan. I have a rough-running engine, possible oil pressure issue. Requesting immediate vectors to the nearest suitable airport. I am approximately forty miles southwest of the Kansas City VOR at seven thousand five hundred feet. Two souls on board. Two hours fuel remaining. Requesting priority handling.

That is roughly twenty seconds of transmission. The moment ATC acknowledges, the dynamic of your situation changes entirely.

What Happens After You Make the Call?

The controller receiving your emergency call does several things in rapid sequence. They note your transponder or assign a code. They alert the supervisor. They coordinate with adjacent facilities and the destination airport. They begin clearing traffic from your path. Emergency services can be put on standby before you reach the approach fix.

The whole system orients itself around you. None of that happens if you stay quiet.

What Should I Do With the Transponder?

Squawk 7700 when you declare an emergency, unless ATC has assigned you a specific code and asked you to keep it. Every radar display with your target on it will flag your return. In a scenario where your radio is also failing, a 7700 squawk alone can alert facilities to your position and status.

What If I Can’t Reach My Assigned Frequency?

121.5 MHz - the international emergency frequency, commonly called guard - is monitored by military facilities, civilian approach controls, most airline crews operating in the continental United States, and search and rescue organizations. If you’ve lost contact with your assigned frequency or your primary radio has failed, transmit on guard. State your situation, position, and intentions. A passing airliner at altitude, a military installation, or another pilot monitoring guard may hear you.

Will I Get in Trouble for Declaring an Emergency?

No. This fear is persistent and it is unfounded.

FAR 91.3 gives the pilot in command explicit authority to deviate from any regulation to the extent necessary to meet an emergency. If you deviate, the FAA may request a written report. That is the full regulatory exposure - may, not must. What FAR 91.3 does not protect you from is the outcome of a delayed decision.

Controllers address the “crying wolf” concern consistently: they would rather respond to a thousand precautionary calls that resolved uneventfully than miss the one that did not. That is not charity - it is how the system is designed to work.

How Should I Prepare for an Emergency Before the Flight?

Before every solo cross-country, work through two scenarios out loud - not in your head, out loud.

Scenario one: Your engine quits on this flight. What do you say on the radio, word for word? Where do you look for landing options first? What does ATC need to know in the first thirty seconds?

Scenario two: Something goes wrong but you’re not sure if it’s a Pan-Pan or a Mayday. At what point does it become a Mayday for you?

Under stress, your brain retrieves rehearsed material - it does not compose from scratch. If you have said the words out loud a dozen times before you needed them, the words will be there when the pressure is on.

What If I’m Outside Radar Coverage?

The same rules apply in non-radar environments. Transmit on whatever frequency is available. Use guard if nothing else works. State your situation, position, and intentions. Even if nobody answers immediately, you have put information into the world that could matter to someone searching for you later.

What If I Hear Another Pilot’s Emergency on the Frequency?

Clear the frequency unless you are in a direct position to help. If you are two hundred miles away with no useful information, stay quiet. If you are nearby with visual contact or position information that could help, key up. Otherwise, silence is the correct choice - the instinct to help can tie up a frequency at exactly the wrong moment.

Key Takeaways

• Mayday = serious and imminent danger requiring immediate assistance. Pan-Pan = serious situation that needs priority handling but has not yet become life-threatening.
• Both calls start with the signal word said three times, followed by facility, aircraft ID, situation, intentions, position, altitude, souls on board, and fuel.
• Declare early, downgrade later. You can always cancel an urgency call if the situation improves.
• Squawk 7700 and monitor 121.5 MHz as backup communication tools when radio contact is uncertain.
• FAR 91.3 protects pilots who declare emergencies and deviate from regulations to handle them. The risk is in waiting, not in calling.