RVS  Reverse 
RVSM  Reduced Vertical Separation Minimum 
RVSN  Reversion 
RVT  Rivet 
RVT  Rotary Variable Transformer 
RWDS  Rearwards 
RWK  Rework 
RWY  Runway 
RZ  Return to Zero 
R&D  Research and Development 
R/AD  Retro/Adaptation Drawing 
R/C  Rate of Climb 
R/D  Rate of Descent 
R/H  Radar Height 
R/hr  Roentgens per Hour 
R/I  Radio/Inertial 
R/I  Removal/Installation 
R/L  Reading Light 
r/min  Revolutions per Minute 
R/T  Receiver Transmitter Unit 
R/T  Radio Transmit 
S  South 
S  Minimum Slat Retract Speed (EFIS) 
s  Second 
SA  Stress Analysis 
SA  Single Aisle 
SACU  Stand Alone Compensator Unit 
SAD  Spares Advance Data 
SAD  Stress Analysis Data 
SADF  Spares Advance Data Form 
SAE  Society of Automotive Engineers 
SAF  Safety 
SAFD  Safetied 
SAL  System Address Label 
SALS  Short Approach Light System 
SALSA  Spot Array Light Supply Adapter 
SAM  Stress Analysis Manual 
SAR  Smart Access Recorder 
SAS  Static Strength Approval Sheet 
SAT  Static Air Temperature 
SATCOM  Satellite Communication 
SAV  Starter Air Valve 
SB  Service Bulletin 
SBD  Single Blade Door 
SBDB  Service Bulletin Data Base 
SBEW  Standard Basic Empty Weight 
SBI  Service Bulletin Index 
SBL  Symbol