Definition
The highest altitude at which an aircraft is authorized to operate under a specific limitation, such as engine performance, pressurization capability, oxygen requirements, or certification restrictions. Exceeding this altitude is prohibited by the aircraft's operating limitations or applicable regulations.
Plain English
The highest altitude an aircraft is allowed to fly to, based on a specific limit set by its design, equipment, or the rules that apply to it.
Context Anchor
Seen in aircraft performance, operating limitations, and discussions of how high an aircraft can safely or legally fly under given conditions.
Why Pilots Care
Prevents attempts to fly too high where the aircraft may lack sufficient lift or engine performance.
Grounding Statement
For a given airplane on a given day, maximum limited altitude marks the upper boundary where the aircraft still meets the required limits.
Intuition Check
Do not read “maximum” as the best or most efficient altitude. Here it means the upper limit: above this altitude, the aircraft is no longer within the required limit.
Example Sentence 1
Before climbing into the flight levels, the pilot confirmed the maximum limited altitude listed in the aircraft's operating handbook.
Example Sentence 2
High density altitude reduced the maximum limited altitude, so they waited for cooler conditions before departure.