Definition
The maximum (and in some cases minimum) temperatures published by the engine manufacturer for specific points within a turbine engine, particularly the area surrounding the turbine section. These limits are stated in the Aircraft Flight Manual or Pilot's Operating Handbook and must not be exceeded during start, acceleration, takeoff, climb, cruise, or any other phase of operation. Exceeding a published limit, even briefly, can damage turbine components and requires a maintenance inspection before further flight.
Plain English
The hottest the engine is allowed to get at certain points inside it, as set by the manufacturer. Going past these limits can damage the engine, even if it only happens for a few seconds.
Context Anchor
Seen in turbine engine operating procedures, cockpit engine gauge checks, and aircraft operating limitations.
Derivation
Limitation comes from limit, meaning a boundary or stopping point. In aviation, a limitation is not just a suggestion; it is an operating boundary the pilot must stay within.
Why Pilots Care
Exceeding these limits can cause immediate turbine damage, reduced engine life, or sudden engine failure.
Grounding Statement
In practice, the engine temperature limit is the point where the pilot stops treating the temperature as normal and takes action.
Intuition Check
Do not read limitations as recommendations or normal target values. Engine temperature limitations are boundaries the pilot must not exceed.
Example Sentence 1
During engine start, the pilot kept a hand near the fuel cutoff in case the temperature approached the engine temperature limitations.
Example Sentence 2
After landing, the crew reviewed the engine temperature limitations in the flight manual before the next flight.