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Featured Definitions

Stabilized Approach Concept

A stabilized approach is the safest profile, and it is one of the most critical elements of a safe approach and landing operation. There are five basic elements to the stabilized approach: Landing Configuration - Stabilized Approach Element 1 The airplane should be in the landing configuration early in the approach. The ...

Flight Director - FD

Flight Director Electronic flight calculator that analyzes the navigation selections, signals, and aircraft parameters. It presents steering instructions on the flight display as command bars or crossbars for the pilot to position the nose of the aircraft over or follow. Flight Director Functions A Flight Director is an extremely useful aid that displays ...

Air Transportation Oversight System ATOS

ATOS The Air Transportation Oversight System (ATOS) is the Federal Aviation Administration’s primary tool for overseeing the nation’s airlines. The fundamental principle of ATOS is that air carriers must have properly designed systems to eliminate or lessen risks before they result in accidents or incidents. ATOS Air Carriers Air carriers are responsible for ...

Rebuilt Aircraft Engine

Rebuilt Aircraft Engine - A used engine that has been completely disassembled, inspected, repaired as necessary, reassembled, tested, and approved in the same manner and to the same tolerances and limits as a new engine with either new or used parts. However, all parts used in it must conform to the ...

Compressor Stall - Turbine Engine

Compressor Stall A Compressor Stall in a gas turbine engine is a condition in an axial-flow compressor in which one or more stages of rotor blades fail to pass air smoothly to the succeeding stages. A stall condition is caused by a pressure ratio that is incompatible with the engine rpm. Compressor ...