Aviation Terminology
Airframe - Structure of an aircraft
AOG - Aircraft on the ground
Bleed Valve - A part that prevents compressor stalls at low engine speeds
Borescope - A straight tube telescope used to visually inspect the insides of an engine
Core - The original part or engine that a customer is having replaced
DER - Designated engineering representative
Duplex Fuel Nozzles - Each adapter assembly in the set is both primary and secondary with two separate spray patterns. Additionally,
the inlet is the adapter that physically connects to the fuel source
EASA - European Aviation Safety Agency
Exchange - Interchange of same type or value
FAA - Federal Aviation Administration
FOD - Foreign object damage
Fuel Exchange Kits - Interchange of overhauled and certified set of nozzles
Fuel Nozzle Set - Set of 14 Fuel Adapter Assemblies consisting of a combination of Primary, Secondary
and Inlet, used to introduce fuel as needed into the engine for combustion.
Gas Generator - An assembly consisting of a compressor rotor, hot section, fuel nozzles, bleed valve and accessory drive gearbox. The gas generator case forms the main body of the engine and provides the external attachment points for installing the engine in an airframe
Hot Section - Consists of the compressor turbine disc, compressor turbine blades, vane ring, small exit duct, shroud housing, compressor turbine shrouds and large exit duct and combustion liner
Lightning Strike - When an aircraft has been struck by lightning
MIO - Metal in Oil
MRO - Maintenance Repair Organization
MRT - Mobile Response Team
Off Wing - When engine is removed from the airframe
On Wing - The state of the engine when attached on airframe
Overhaul - The process of restoring and maintaining the part or engine to a serviceable condition
PMA - Parts Manufacturer Approval
Power Section - Consists of a single or dual- stage turbine and shaft driving a two-stage reduction gearbox and output shaft
Pratt & Whitney Canada - Designer and manufacturer of the PT6A engine
Prop Strike - When a prop makes contact with any object
PT6A - A family in a series of turboprop engines designed and manufactured by Pratt & Whitney Canada for fix wing aircraft.
RTC - Regional Turbine Center
Simplex Fuel Nozzles - Each of the 14 adapter assemblies has a singular spray pattern consisting of either a primary, secondary or inlet adapter
Sudden Stoppage - The sudden loss of thrust to the engine compressor
TAT - Turn-around time
Turboprop - Type of turbine engine which drives an aircraft propeller using a reduction gear
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