Definition
A combined cockpit instrument, typically found on turbine-powered airplanes, that displays both the temperature and the pressure of the engine oil on a single gauge or readout. It allows the pilot to monitor whether the oil is operating within the manufacturer's specified limits during start, taxi, takeoff, cruise, and shutdown.
Plain English
One gauge that shows two things about the engine's oil at the same time: how hot it is and how hard it is being pumped through the engine.
Context Anchor
Seen on the engine instrument panel and checked during engine start, before takeoff, in flight, and during shutdown.
Why Pilots Care
Abnormal oil temperature or pressure readings give early warning of lubrication failure that can destroy the engine.
Analogy
Like the oil temperature and pressure gauges on a car dashboard, but combined into one dial for the aircraft engine.
Grounding Statement
The oil temperature/pressure indicator answers: “Is the engine oil in a safe operating range right now?”
Intuition Check
Do not think of this as an oil quantity gauge. It does not mainly tell how much oil is in the engine; it tells how hot the oil is and whether it is moving through the engine with proper pressure.
Example Sentence 1
During the runup, the pilot checked the oil temperature/pressure indicator to confirm both readings were in the green arc before advancing the power levers.
Example Sentence 2
A sudden drop on the oil temperature/pressure indicator led the pilot to shut down the engine on the ground.