ATR 42 Model : 500
CONTROLS
POWER PLANT
P 7
NOV 97
001
1.16
.
40
Two sensing torque probes are located on the reduction gear box. One of them sends
a signal to the AFU which supplies the analogic torque ind. (pointer). The other one
sends a signal to the EEC which supplies the electronic torque ind. (digital counter).
Digital counter
Actual torque is displayed.
If 000" is displayed, torque sensor is failed.
if "ĆĆĆ" is displayed, EEC cannot control the HBV which is then closed.
If LAB" is displayed, a wrong EEC is installed.
Pointer
Actual torque is displayed.
Green sector
: 0-100 %
Normal T.O. mark : 90 %
Red mark
: 100 %
Red dashed radial : 121.8 %
Red dot
: 137 %
FDAU target
Displays the maximum torque value computed by the FDAU depending on the PWR
MGT selection (except on the T.O. position where reserve T.O. torque is displayed).
Notes : 1) In case of FDAU target failure associated with a pointer misfunctioning,
an AFU failure may be suspected (see page 1).
2) 15 sec are necessary to obtain a valid FDAU target indication on non
affected side after a rotary selector change.
Manual target
Controlled by the knob 5, displays a manually selected torque target.
Knob
Enables setting of target bug 4.
Test pb
Allows to test the ind. During test, both counter and pointer will display 115 %.
Note : A blue dot is provided on the ind. scale to identify 115 %.
AA
1
R
2
3
4
5
6
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