SCFM  Standard Cubic Feet Minute of Gaseous Airflow 
SCG  System Configuration Guide 
SCH  Schematic 
SCI  Secure Communication Interface 
SCN  Specification Change Notice 
SCO  Section Control 
SCO  Section Controller 
SCR  Screw 
SCR  Specification Change Request 
SCS  Single Channel Simplex 
SCS  Supplemental Cooling System 
SCU  Supplemental Control Unit 
SCU  System Control Unit 
SCUP  Scupper 
SD  System Drain 
SD  System Display 
SDAC  System Data Analog Converter 
SDAC  System Data Acquisition Concentrator 
SDAU  Special Data Acquisition Unit 
SDB  Signals Data Base 
SDCU  Smoke Detection Control Unit 
SDD  System Description Document 
SDF  Smoke Detection Function 
SDG  Spares Data Guide 
SDI  Source Data Identifier 
SDI  Source/Destination Identifier 
SDN  System Description Note 
SDOF  Single Degree of Freedom 
SDP  Steering Disconnect Panel 
SDTM  Structure Description Training Manual 
SDU  Seat Display Unit 
SDU  Satellite Data Unit 
SDW  Specific Design Work 
SE  Simplified English 
SE  Section 
SEAL  Sealing 
SEB  Seat Electronic Box 
SEB  Service Evaluation Bulletin 
SEC  Spoiler Elevator Computer 
SEC  Secondary 
SEC  SECondary Computer 
SECT  Section 
SEG  Segment 
SEL  Select, Selected, Selector, Selection 
SELCAL  Selective Calling System 
SELV  Selector Valve 
SENS  Sensitivity 
SEP  Separator 
SEPDC  Secondary Electrical Power Distribution Center 
SEQ  Sequence, Sequential 
SER  Serial 
SER  Serial Number 
SERNO  Serial Number 
SER/PRL  Serial to Parallel 

SES  Support Equipment Summary 
SES  Supplier Equipment Specification 
SET  Setting 
SF  Spot Face 
SFC  Specific Fuel Consumption 
SFCC  Slat Flap Control Computer