YC ECONOMY CLASS, TOURIST CLASS
YCF ECONOMY CLASS FRONT
YCR ECONOMY CLASS REAR
YD YAW DAMPER
YEL YELLOW
YES YANKEE ESCAPE SYSTEM
Z ZULU
Z ALTITUDE
Z INTERIOR PANEL
Z TIME (UTC)
Z VERTICAL REFERENCE AXIS
Z ZONE
ZA PRESSURE ALTITUDE
ZAJB ZONE AUDIO JUNCTION BOX
Z-ARM VERTICAL ARM
ZC ZONE CONTROLLER
ZCB CABIN ALTITUDE
ZD ZENER DIODE
ZFCG ZERO FUEL CENTER OF GRAVITY
ZFW ZERO FUEL WEIGHT
ZLD LANDING ELEVATION
ZOTC ZONE TEMPERATURE CONTROLLER
ZP PRESSURE ALTITUDE
ZPI INDICATED PRESSURE ALTITUDE
ZULU ZULU TIME = UTC