View Full Version : EICAS Display
DTTogaLI
13th Nov 2005, 16:31
Hi, simple question..
If both displays of an eicas system fail, what information will be displayed on the standby engine indicator?
N1 EGT N2 or N1 EGT EPR
Flyrr100
13th Nov 2005, 18:12
Depends on the aircraft.
DTTogaLI
13th Nov 2005, 18:18
in the JAA aircraft :confused:
And about the Indicated Airspeed as read on the ASI
Reamins unchanged in headwind and tailwind? Again, JAA ASI ;)
Flyrr100
13th Nov 2005, 19:28
Huh?
What's a JAA aircraft?
Many different aircraft have EICAS. I fly an Embraer. I'm sure ours is diffent from say, the Airbus.
The ASI reads the speed the aircraft is travelling through the air. Headwinds or tailwinds have nothing to do with what you read.
High Wing Drifter
13th Nov 2005, 20:11
I think the JAA ATPLs are based around the 737. Kel suprise!
Regarding Engine indications you probably don't get anything displayed.
For crew alerting, you would get local warnings - ie Warnings not displayed centrally but locally to the actual fault (eg Generator Failure would only light up Gen Fault light in overhead panel with no other warnings).
True, it does depend on aircraft, but this is the general philosophy.
Gazeem
14th Nov 2005, 09:57
On the Standby Engine Indicator (SEI) on the 757 you get LCD style displays of:
EPR
N1
EGT
and
N3 (RR Engines)
on the 767 you get:
N1
EGT
N2 (GE Engines)
The SEI will activate on loss of AC power or on EICAS failure
when selected in the auto mode.
Specific to 757/767 only in our configuration, but I hope this gives you an idea.
High Wing Drifter
14th Nov 2005, 11:11
N1 EGT N2 or N1 EGT EPR
Thinking about this (please correct my reasoning), from an Engineer's point of view (I'm not one BTW). I would imagine "N1 EGT N2" as this provides more information on the state of the engine. On the Boeings (or is it engine specific?), I believe, N1 is used to indicate thrust rather than EPR. Thefore the "N1 EGT EPR" display, from the Pilot's view, would show one item of redudant information.
Pole Hill
14th Nov 2005, 17:35
HWD
With all respect, a few corrections. :) To the best of my knowledge....
The primary power setting parameter is engine specific, EPR on RR engines and N1 on GE engines.
If both EPR and N1 are displayed on the standby instrument, both are useful to the pilot. :ok:
POL
Tallbloke
18th Nov 2005, 17:05
From the Bristol notes, which are all written around the MRJT-1 for the JAA exams,:If EICAS fails a standby engine indicator shows EPR, N1, EGT and N2 on an LED display.
SO that does not really help at all.... Where is the question from?