ETOPS - Engines Turn Or Passengers Swim
Good Idea.
A few off the top of my head:
FADEC: Full-Authority Digital Engine Control
AHRS: Attitude and Heading Reference System
DEC: Digital Engine Control
EEC: Electronic Engine Control
LED: Light Emitting Diode, or Leading Edge Devices
INS: Inertial Navigation System
NAT: North Atlantic Track
CMC: Central Maintenance Computer
GPWS: Ground Proximity Warning System
A/I: Anti-Ice
HSV: High Stage Valve (usually associated with Bleed Air systems)
ATS: Air Turbine Starter
AGB: accessory gear box
N1: The fan stage of a Turbine engine
N2: The power stage of a turbine engine
NWS: Nosewheel Steering
BAe: British Aerospace
TCAS: Traffic Collision Avoidance System
BOW: Basic Operating Weight
EDP: Engine Driven Pump