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EAA - Experimental Aircraft Association, the American
homebuilders' organisation.
EADI - electronic attitude director indicator. An
ADI with CRT cockpit display forming part of an EFIS,
below.
EAS - equivalent airspeed.
EAT - estimated (or expected) approach time.
EBAA - European Business Aircraft Association.
ECAC - European Civil Aviation Conference.
ECOGAS - European Council of General Aviation
Support.
ECU - environmental control unit.
ED - emergency distance.
EET - estimated elapsed time.
EFAS - electronic flash approach light system.
EFATO - engine failure at (or after) take-off
EFIS - electronic flight instrument system, in
which multi- function CRT displays replace traditional
instruments for providing flight, navigation and aircraft
systems information, forming a so-called 'glass cockpit'.
Now common in commercial transports, corporate aircraft
and helicopters, military fighters and some GA piston
singles and twins.
EGT - exhaust gas temperature (gauge). A device
which provides a cockpit readout of the exhaust gas
temperature of an aircraft's (piston) engine(s), enabling
the pilot to lean the mixture for maximum fuel efficiency.
EHSI - electronic horizontal situation indicator.
CRT-based HSI forming part of an EFIS.
EICAS - engine indication and crew alerting system.
CRT display which monitors engine performance and alerts
the crew to system or airframe failure. Found in
new-generation transports and business jets.
EICMS - engine in flight monitoring system
ELT - emergency locator transmitter. A small radio
transmitter fixed to an aircraft's structure which is
automatically activated by impact or water immersion and
transmits a code on emergency frequencies enabling SAR
satellites or search units equipped with DF to locate the
crash or ditching site. Carriage mandatory in the USA, but
not in UK. Sometimes styled ADELT, automatically
deployable ELT, or ELB, emergency locator beacon.
empty weight - weight of the basic aeroplane
including all fixed equipment, plus unusable fuel, oil,
hydraulic and other fluids.
encoding altimeter - an altimeter which gives a
digital output to the transponder (which see) for
automatic transmission of the aircraft's pressure altitude
to ATC.
EOBT - estimated off blocks time.
EPNdB - effective perceived noise decibel. Unit of
measurement of aircraft noise levels.
ER - extended range.
eshp - equivalent shaft horsepower.
ETA - estimated time of arrival. Also ETD,
estimated time of departure; ETE, estimated time en route.
ETOPS - extended range twin operations, usually
long over water flights by airliners.
ETPS - Empire Test Pilots School, based at the
Aircraft & Armament Experimental Establishment, Boscombe
Down.
Eurocontrol - organisation, headquartered in The
Netherlands, comprising Belgium, France, Germany, Ireland,
Luxembourg, Netherlands and UK for coordinating enroute
air traffic control in Europe.
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