Vibration and Noise
Cockpit and Cabin Ventilation
Autoflight
Communications
Electrical Power
Equipment / Furnishings
Fire Protection
Fuel System
Hydraulic Power
Ice and Rain Protection
Indicating / Recording
Landing Gear
Lighting
Navigation
Cabin System
Doors
Windows
Main Rotor Drive

ADI Attitude and Direction Indicator
ADF Automatic Direction Finder
AFCS Automatic Flight Control System
AVCS Active Vibration Control System
AP Autopilot