WGD Windshield Guidance Display
WGDC Windshield Guidance Display Computer
WGDS Windshield Guidance Display System
WHC Window Heat Computer
WHL Wheel
WIPCU Water Ice Protection Control Unit
WIPDU Water Ice Protection Data Unit
WIRC Warning - Inhibition - Recall - Clear
WLDP Warning Light Display Panel
WLG Wing Landing Gear
WLM Wireless LAN Manager
WLP Weight Limited Payload
WM Wattmeter
WM Wiring Manual
WMAXOP Maximum Operational Speed
WO Wash-out
WOR Wear Out Rate
WOW Weight On Wheels
WP Work Package
WPT Waypoint
WR Weather Radar
WR Weighing Report
WRG Wiring
WRK Work, Working
WS Wind Speed
WSCP Warning and System Control Panel
WSCS Wheel Steering Control System
WSDP Warning and System Display
WSHLD Windshield
WSR Weekly Service Report
WSSG Warning System Symbol Generator
WT Weight
WTB Wing tip brake
WTR Water
WUC Work Unit Cost
WX Weather Mode (ND)
WXR Weather Radar
W/V Wind Direction and Speed
X Cross
X Trans
X-TALK Cross-talk
X BLEED Crossbleed
X FEED Crossfeed
X LINE Crossline
X VALVE Cross Valve
XARM Cross Arm
XBAR Crossbar
XCHECK Crosscheck
XCVR Transceiver
XDCR Transducer
XFMR Transformer
XFR Transfer
XING Crossing
XLOAD Crossload
XLTR Translator
XML Extensible Mark-up Language
XMSN Transmission
XMTR Transmitter
XPDR Transponder
XPNDR Transponder
XREF Crossreference
XSEC Extra Section
XT Reception (Transponder to TCAS)
XTAL Crystal
XTK Cross Track Deviation
XTK Cross Track Error
XTK Cross Track Distance
XWIND Crosswind
Y Yellow
YC Tourist Class
YCF Economy Class-Front
YCL Economy Class Front
YCR Economy Class-Rear
YE Year
YES Yankee Escape System
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