Specifications

SECTION III
INSTRUMENTATION AND AVIONICS
MODEL 560
The ITT gage is calibrated from 0 - 750
0
C. The temperature displayed is a synthetic inter-turbine
temperature which is computed by measuring the exhaust gas temperature and adding to it three times the
temperature rise across the bypass duct. During normal engine operation, if the 741
0
C redline is exceeded,
the ITT vertical indicator will turn red and red digits will be displayed. During an engine start sequence,
green ITT digits will be displayed and the vertical indicator and digits will only turn red if the start
temperature redline (740
0
C) is exceeded. When the ignition system is on, IGN is annunciated in green
letters above the ITT vertical indicator.
The oil pressure gage is calibrated from 0 - 260 psi. The vertical indicator (or digits in the reversionary
mode) turn red or yellow if a redline is exceeded or the yellow band is entered. When the 160 psi redline is
exceeded, the red color change is suppressed for 400 seconds. Exceeding the 250 psi redline is indicated
in red immediately. During engine start and shutdown, the yellow range changes of the indicators or digits
are suppressed, the red triangle is still active.
The oil temperature gage is calibrated from 0 - 140
0
C. The vertical indicator (or digits in the reversionary
mode) turn red if the 121
0
C redline is exceeded.
The fuel flow gage displays fuel flow in pounds per hour. Readings are accurate at stabilized power
settings.
Ram air temperature (RAT) gage is calibrated from -70 - +70
0
C. It displays outside air temperature
uncorrected for ram rise.
The fuel temperature gage is calibrated from -60 - +70
0
C.
The fuel quantity gage is calibrated in pounds of fuel and accurately displays the fuel remaining in the left
and right tanks.
MAGNETIC COMPASS
A standard liquid filled magnetic compass is mounted above the glareshield.
FLIGHT HOUR METER
The quartz hour meter on a panel next to the right circuit breaker panel displays the total flight time on
the airplane in hours and tenths. The landing gear squat switch activates the meter when the weight is off
the gear. A small indicator on the face of the instrument rotates when the hour meter is in operation. It
receives DC power from a circuit breaker (FLT HOUR) on the left circuit breaker panel.
I 3-12 Configuration AA 56OMB-01