CTU  Cabin Telecommunications Unit 
CTWT  Counterweight 
cu  Cubic 
CU  Control Unit 
CUDU  Current Unbalance Detection Unit 
CUR  Current 
CV  Curriculum Vitae 
CVE  Compliance Verification Engineer 
CVL  Configuration Variation List 
CVM  Cabin Video Monitoring 
CVMS  Cabin Video Monitoring System 
CVR  Cockpit Voice Recorder 
CVRS  Cockpit Voice Recorder System 
CVS  Cargo Video Surveillance 
CVT  Center Vent Tube 
CVU  Crypto Voice Unit 
CW  Clockwise 
CWG  Cockpit Working Group 
CWLU  Cabin Wireless LAN Unit 
CWS  Control Wheel Steering 
CWS  Cabin Work Station 
CWSIU  Combined Wheel Speed Interface Unit 
CWY  Clearway 
CY  Cycle 
CY  Calendar Year - Current Year 
CYL  Cylinder 
C/B  Circuit Breaker 
C/L  Check List 
C/M  Command/Monitor 
C/M  Crew Member 
C/O  Change Over 
C/S  Call Sign 
C/SSR  Cost/Schedule Status Report 
DA  Drift Angle 
DABS  Discrete Address Beacon System 
DAC  Drawing Aperture Card 
DAC  Digital to Analog Converter 
DADC  Digital Air Data Computer 
DADS  Digital Air Data System 
DAF  Damping Augmentation Function 
DAGS  Dry Air Generation System 
DAMP  Damping 
DAMPG  Damping 
daN  Load (DecaNewton) 
DAR  Digital AIDS Recorder 
DAR  Digital ACMS Recorder 
DAS/STC  Designated Alteration Station/Supplemental Type Certific 
DAU  Data Acquisition Unit 
DB  Decibel 
DB  Data Base 
dB  Decibel 
DB  Database 
DBBS  Data Base Bulletin Service 
DBC  Data Bus Communication 
DBD  Data Basis for Design 

DBLR  Doubler 
dB(A)  A-Weighted Decibel 
DC  Direct Current 
DC  Domain Coordinator