Message Level Notes Condition MEL Item
EICAS DISPLAY Advisory Basic EICAS upper or lower pilots
display unit failed, off, or blank due to computer fault.
EICAS SOFTWARE Status Option EICAS detects an incompatible
OPC/OPS (Operational program configuration/Operational program software)
configuration.
ELEC FILTER Status Option One or more of the electronic
filters for the IFE (Inflight Entertainment System) has failed.
ELEV ASYM Status Basic Elevator asymmetry protection
system fault.
ELEV C HYD PRESS Status Basic Center elevator hydraulic system
pressure reducer valve senses high or low pressure. 31-41-1
31-41-1
25-20-1
None
None

ELEV FEEL Status Basic Elevator feel system detects fault. None
ELEV L HYD PRESS Status Basic Left elevator hydraulic system None
pressure reducer valve senses
high or low pressure.
ELEV R HYD PRESS Status Basic Right elevator hydraulic system None
pressure reducer valve senses
high or low pressure.
ELT ON Advisory Option Emergency Locator Transmitter N/A
has been activated.
EMER DOORS Advisory Basic Two or more emergency doors 52-71-1
unlatched.
EMER LIGHTS Advisory Basic Emergency light switch in off or N/A
on position.
ENG BTL 1 Advisory Basic Engine bottle 1 low pressure. 26-20-1
ENG BTL 2 Advisory Basic Engine bottle 2 low pressure. 26-20-1
ENGINE CONTROLS Advisory Basic Two or more EEC channels None
inoperative on the ground with
both engines running, or stator
vane position cross check failure,
or thrust reverser position sensor
crosscheck failure, or EEC
detected air data failure
condition.
 
Message Level Notes Condition MEL Item
 
EQPT CLG FAN Status Basic One or more equipment cooling
supply fans failed in either the forward, flight deck, or aft blow through system.
EQPT CLG FLOW Status Basic Low flow detected in forward,
flight deck, or aft cooling ducts on the ground.
EQPT CLG SENSOR Status Basic One or more low flow sensor(s)
failed test.
EQPT CLG TEST Status Basic Equipment cooling system
automatic self test not performed or not completed.
EQPT OVHT Advisory Basic Both forward or both aft supply
fans not running or left recirculation fan failed and overboard exhaust valve not open after 10 seconds.
EQPT SMOKE TEST Status Basic Forward equipment smoke
detection system failed automatic test.
FAST/SLOW FAIL Advisory Prov’n Instrument comparator unit
　
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