FlightSafety LEARJET 45 - Fuel Flow

LEARJET 45 PILOT TRAINING MANUAL
7-11
FOR TRAINING PURPOSES ONLY
FlightSafety
international
white to amber or red if the normal range of
30 to 127 degrees C is exceeded.
Fuel Flow
Fuel flow in pounds per hour (FF PPH) is dis-
played for each engine beneath the oil dis-
plays (Figure 7-6). The digits of the display
are always white and have a range of 0 to 2000
PPH with a resolution of 10 PPH. If the fuel
flow signal is invalid, the digits will be re-
placed with four amber dashes.
If selected at installation, fuel flow measure-
ment and display can be configured for kilo-
grams per hour (KPH). If KPH is selected,
the value range is 0 to 910 KPH.
The dual fuel flow converter (DFFC), located
downstream of the FCU (fuel control unit)
and prior to the flow dividers, acquires data
from two temperature sensing volumetric fuel
flow meters and determines fuel mass flow.
This information is passed through the DAUs
to the symbol generators and then to the fuel
flow displays on the EICAS.
985 880
100
1014
916
985 880
100
1014
941
CONDITION 1
• Power set to below T/O
and APR not active and
no anti-ice
CONDITION 2
• Engine start or
• Power at T/O < 5 min. or
• MCT with any anti-ice on
985 880
100
1014
963
985 880
100
1014
941
916
CONDITION 3
• Manual mode or
• DEEC on and T/O > 5 min or
• APR activated > 5 min
CONDITION 4
• DEEC on and T/O with
APR active < 5 min, or
• Power at T/O < 5 min. with
anti-ice on (No APR)
Note: Numbers outside of the arc are added for illustration purposes only.
(Honeywell Phase III Software Upgrade)
Figure 7-7. ITT Arc Conditions