Definition
An emergency instruction in an aircraft flight manual or pilot's operating handbook directing the pilot to put the aircraft on the ground at the nearest suitable surface without delay, accepting that damage to the aircraft may occur. It signals that continued flight poses an unacceptable risk to the occupants.
Plain English
Get the aircraft on the ground right now, wherever you safely can. Don't try to reach an airport if doing so means staying in the air longer. Saving the aircraft is no longer the priority — saving the people on board is.
Context Anchor
Seen in emergency procedures, warning messages, and abnormal-condition guidance when the aircraft should not continue flying longer than necessary.
Derivation
Land comes from the idea of bringing something onto the ground. Immediately comes from a Latin idea meaning “with nothing in between.” In this aviation phrase, it means no planned delay between the emergency and getting the aircraft down, except what is needed to stay in control.
Why Pilots Care
It signals that delaying the landing could lead to loss of aircraft control or an accident, so the pilot must act at once.
Grounding Statement
If the aircraft is unsafe to keep flying, the goal is no longer to complete the trip; the goal is to get down under control as soon as possible.
Intuition Check
Do not read this as “land when it is convenient.” In this context, it means landing becomes the top priority, with only enough delay to keep control and avoid creating a worse situation.
Example Sentence 1
When the engine fire warning illuminated and the fire persisted after the checklist actions, the checklist directed the crew to land immediately.
Example Sentence 2
The pilot chose to land immediately when smoke appeared in the cockpit rather than continue to the destination.