Aviation Glossary - E
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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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