Acronyms and Abbreviations

Common Acronyms and Abbreviations at Fault Tree Central:
CIL = Critical Items List CS = Cutset
FMEA = Failure Modes and Effects Analysis FT = Fault Tree Analysis
FTA = Fault Tree GOX = Gaseous Oxygen
JSA = Job Safety Analysis LOX = Liquid Oxygen
LRU = Line Replaceable Unit MA = Markov Analysis
MOB = Multiple Occurring Branch MOE = Multiple Occurring Event
PC = Programmable Controller PRA = Probabilistic Risk Assessment
O&SHA = Operating & Support Hazard Analysis TUE = Top Undesired Event
TVC = Thrust Vector Control UE = Undesired Event

Nomenclature Acronyms and Abbreviations at Fault Tree Central:
ACT = Actuator C = Closed
CL = Closed CMD = Command
CONT = Contact F = Fail
FC = Fail Closed FOF = Fail Off
FOP = Fail On FOP = Fail Open
FLO = Flow HI = High
LO = Low MFV = Main Fuel Valve
MOV = Main Oxidizer Valve OP = Open
POV = Pneumatically Operated Valve PMP = Pump
PT = Pressure Transducer PWR = Power
SOL = Solenoid SOV = Solenoid Operated Valve
SW = Switch THR = Thruster
TNK = Tank VLV = Valve
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Fault Tree Central is:
Allen Long

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