Table of Contents
Advertisement
2.
G. (10)
Engine/APU Exceedance (EXCEEDANCES) Display
The EXCEEDANCES
system
page display
consists
of the following
functions
and annunciations
(Figure
239).
.
No
exceedances
recorded
message
Engine
exceedance
monitor
with
the
following
functions:
-
Snapshot
recording
of maximum
exceedance
value
for
TGT,
LP,
and
HP
-
Recording
of
time
the
parameter
was
in exceedance
band
-
Indication
of which
parameter
tripped
the
exceedance
monitor
APU exceedance monitor with the following functions:
-
Snapshot recording of maximum exceedance value
for
APU
EGT
and
RPM
-
Indication
of which
parameter
tripped
the
exceedance
monitor
Selecting
the
EXCEEDANCES
system
page
prior
to
an
exceedance
causes
the
NO
EXCEEDANCE
RECORDED
message
to be displayed
in white across
the system page display field as shown in Figure 240.
When an engine exceedance is encountered, the blue ENGINE EXCEEDANCE
EICAS message is displayed. Subsequent selection of the EXCEEDANCES
system page will show the parameter that caused the engine
exceedance on the TRIGGERED BY line.
The
highest
value
of
all
~
parameters
is recorded
on
the
display.
The
time
clock
is
started
only
if the
appropriate
parameter
is above
the
exceedance
threshold.
The
exceedance
thresholds
are
set
in accordance
with
the
G-IV
flight
manual.
The
clock
is stopped
when the actual value drops below
the lower hysteresis trip threshold,
(LP<
95%, HP<97%,
and TGT
< 710
"c).
Once all values drop below the exceedance thresholds,
the display will hold the last exceedance data until the power is
removed or another exceedance is detected.
The APU exceedance monitor works in the same manner except that a
blue APU EXCEEDANCE EICAS message is displayed and time is not
recorded.
All exceedances
are held
in the fault warning
computer
memory
and
can be retrieved
by maintenance
personnel
as needed.
22-14-00
Page 298.11
Aug 15/91
Use or disclosure
of information
on this page is subpxf
to the restrictions
on the title page of this document.
- Quick Links:
- Spz-8000 System Flow Diagram
Hide quick links:
Advertisement
Table of Contents
