JULIAN DATE—The year and numerical day
of the year identified by four numeric characters.
The first character indicates the year, and the
remaining three characters specify the day of the
year. For example, 3030 indicates the 30th day
of 1983.
KINKED—A twist or curl, as in cable, wire,
or tubing, caused by its doubling or bending upon
itself.
LOX—Liquid oxygen.
LRU—Leg restraint unit.
MAINTENANCE—The function of retaining
material in or restoring it to a serviceable
condition.
MBEU—Martin-Baker Ejection Unit (seat).
MIM—Maintenance Instruction Manual.
MRC—Maintenance Requirement Card.
MULTIMETER—An instrument used for
measuring resistance, voltage, or amperage.
NACES—Naval aircrew escape system.
NADEP—Naval Aviation Depot.
NATOPS—Naval Air Training and Operating
Procedures Standardization.
NAVAIRSYSCOM—NAVAIR; NA (Naval
Air Systems Command).
NFO—Naval flight officer.
NOMENCLATURE—A system of names;
systematic naming.
NOTE—An operating procedure, condition,
etc., which, because of its importance, is essential
to highlight.
NSN—National stock number.
OPNAV—Office of the Chief of Naval
Operations.
OXIDATION—That process by which oxygen
unites with some other substance, causing rust or
corrosion.
PHYSIOLOGICAL—Of or pertaining to the
body.
PRESSURE—The amount of force distri-
buted over each unit of area. Pressure is expressed
in pounds per square inch (psi). -
PSI—Pounds per square inch.
PSIA—Pounds per square inch absolute.
PSIG—Pounds per square inch gauge.
PSYCHOLOGICAL—Pertaining to, or de-
rived from the mind or emotions.
RAC—Rapid action change.
SAFETY WIRE/LOCKWIRE—A wire set
into a component to lock movable parts into a
safe, secure position.
SDLM—Standard depot-level maintenance.
SE—Support equipment. All the equipment
on the ground needed to support aircraft in a state
of readiness for flight. Formerly ground support
equipment (GSE).
SERVICING—The filling of an aircraft with
consumables such as fuel, oil, and compressed
gases to predetermined levels, pressure, quantities,
or weights.
SJU—Seat jettison unit.
SMDC—Shielded mild detonating cord.
SOLVENT—A liquid that dissolves other
substances.
SPCC—Ships Parts Control Center.
TENSION—A force or pressure exerting a
pull or resistance.
TM—Type maintenance.
T/M/S—Type/model/series.
TORQUE—A turning or twisting force.
TOXIC—Harmful, destructive, deadly; poi-
sonous.
AI-2
