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less than 5 minutes with APR not acti-
vated, or MCT with any anti-ice on.
3. When the engine is being operated in
manual (MAN), or computer OFF mode,
or DEEC is on and thrust lever in T/O
more than 5 minutes, or APR has been
activated for more than 5 minutes.
4. With the DEEC on, T/O power set and
APR activated for less than 5 minutes,
or T/O power set for less than 5 minutes
without APR, but with Anti-Ice ON.
(The A/I ON limit of 963° C is only ap-
p l i c a b l e o n a i r c r a f t e q u i p p e d w i t h
Honeywell Phase III software upgrade.)
Regardless of which condition exists, if the
pointer enters the amber band, the pointer and
the digital display will turn amber and if the
pointer passes the red tick, the exceedance
arc will appear and the pointer and digital dis-
play will turn red alerting the operator to an
overtemp condition.
Turbine Speed (N2)
Turbine speed (N2) is remotely sensed by a
dual-element monopole located within the trans-
fer gearbox which works basically the same as
the N1 monopole. One output signal is sent to
the DEEC and the other independent signal is
sent to the EICAS display (Figure 7-6).
The N2 display on the EICAS is a digital read-
out, percentage of the turbine rotation speed.
The N2 range is from 0 to 115 percent. If N2
exceeds 100.0%, the display will change from
white to amber and an amber box will appear
around the N2 digital display. If N2 exceeds
102.5, the display will change from amber to
red and a red box will appear around the dig-
ital display. If APR is activated, the N2 dis-
play will not turn amber unless 101.1% is
exceeded. See Table 7-1.
Oil Indications
Oil pressure and temperature for each engine
are digitally displayed on the EICAS beneath
the N2 digital display (Figure 7-6). Oil pres-
sure is displayed in white when the pressure
is between 65 and 80 psig. When low or high
exceedances occur, the digital display will
change to amber or red. See ENGINE OIL
SYSTEM in this chapter for more information.
The oil temperature is displayed in degrees
Celsius beneath the oil pressure indications for
each engine. The display will change from
L E A R J E T 4 5
P I L O T T R A I N I N G M A N U A L
7-10
FOR TRAINING PURPOSES ONLY
FlightSafety
international
OPERATING
MODE
WHITE
°
C
AMBER
°
C
RED
°
C
APR
(< 5 minutes)
T/O
Anti-Ice – ON
(< 5 minutes)
T/O
Anti-Ice – OFF
(< 5 minutes)
0 – 963
0 – 963
0 – 941
N/A
N/A
N/A
964 – 1014
T/O or APR
(> 5 minutes)
0 – 916
917 – 941
942 – 1014
MCT
Anti-Ice – ON
0 – 941
N/A
942 – 1014
MCT
Anti-Ice – OFF
0 – 916
N/A
917 – 1014
MCR or
Below
0 – 900
N/A
901 – 1014
START
0 – 941
N/A
942 – 1014
964 – 1014
942 – 1014
Table 7-2. ITT DISPLAY