AL50/MPG5
Chapter 2. GENERAL
2-2. SYMBOLS, ABBREVIATIONS AND TERMINOLOGY
ICAO
International Civil Aviation Organization
IFR
Instrument flight rules
ILS
Instrument landing system
ISA
International Standard Atmosphere: 15˚C and 1013.2 hPa at MSL (mean sea level), with a
decrease of 6.5˚C per 1000 m of altitude from MSL to 11000 m.
ITT
Interturbine temperature
JAA
Joint Aviation Authorities
JAR STD 3A
Joint Aviation Requirements regarding Aeroplane Flight & Navigation Procedures
Trainers
KCAS
Calibrated airspeed in knots
KIAS
Indicated airspeed in knots
mb
millibar - unit for pressure (see below under “units”)
MSL
Mean sea level
OAT
Outside air temperature
OBI
Omni-bearing indicator
OBS
Omni-bearing selector
PAX
Passenger
Pressure altitude
Altitude measured from standard sea level pressure (1013.2 hPa) by means of
a pressure (barometric) altimeter.
psi
Pounds per square inch - unit for pressure (see below under “units”)
RMI
Radio magnetic indicator
RPM
Revolutions per minute - unless otherwise indicated, in this manual the term refers to the
propeller’s revolutions.
TAS
True Airspeed is the airspeed of an airplane relative to undisturbed air which is the CAS
corrected for altitude, temperature and compressiblility.
Unusable fuel
Fuel that is not available to the engine (due to tank configuration etc.)
Usable fuel
Fuel available for flight planning
V
A
Maneuvering speed: Maximum speed at which application of full available aerodynamic con-
trol will not overstress the airplane
V
FE
Maximum flaps extended speed: Maximum speed with wing flaps in extended position
V
FO
Maximum flaps operation speed: Maximum speed at which flaps may be extended or re-
tracted
VFR
Visual flight rules
V
LE
Maximum landing gear extended speed: Maximum speed with landing gear extended
V
LO
Maximum landing gear operating speed: Maximum speed at which the landing gear may be
extended or retracted
19/1/2007
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