QC Quality Control
QD Quick Donning
QDB Quality Directors Board
QDR Magnetic Heading to a Station
QEC Quick Engine Change
QEI Quality Event Information
QF Quality Task Force
QFE Baro Pressure Setting for Airfield Altitude
QFE Field Elevation Atmospheric Pressure
QFE Pressure Setting for Airfield Altitude
QFU Runway Heading
QIG Quality Improvement Group
QIR Quality Improvement Request
QLB Quality Log Book
QMS Quality Management System
QMU QAM Modulator Unit
QNE Sea Level Standard Atmosphere Pressure
QNH Baro Pressure Setting for en Route Altitude
QNH Sea Level Atmospheric Pressure
QNH Pressure Setting for En Route Altitude
QNH Sea Level Pressure
QPL Qualified Products List
QRH Quick Reference Handbook
QSR Quarterly Service Reports
QSR Quality Survey Report
qt Imperial quart or United States quart
QT Quart (US)
QTE True Heading to a Station
QTY Quantity
QTZ Quartz
QUJ True Radial from a Station
R Red
R Radius
R Release
R Rankine
R Reset
R Resistor
R Yaw Rate
R Right
R-LMF Right Side Local Maintenance Function
R-OMS Right Side Onboard Maintenance System
RA Resolution Advisory
RA Redundancy Assurance
RA Radio Altimeter, Radio Altitude
RAAS Runway Awareness and Advisory System
RAC Rules of the Air and Air Traffic Control
RAC Rotor Active Clearance
RACC Rotor Active Clearance Control
RACON Radar Beacon
RACSB Rotor Active Clearance Start Bleed
RAD Radio
RAD Random Access Device
RAD Roll Anticipation Distance
RADCON Radar Data Converter
RadM Radioactive Material
RADVR Random Access Digital Video Reproducer
RAG Repair Assessment Guidelines
RAI Ram Air Inlet
RAIL Runway Alignment Indicator Light System
RAIMS Radio and Audio Management System
RALTU Reprogrammable Annunciator Light Test Unit
RAM Random Access Memory
RAPCON Radar Approach Control
RAS Repair Design Approval Sheet
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