Eagle ICA-D212-725, Instructions Manual

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ICA-D212-725 (96)
Page 72 of 90
CHAPTER 96 – ELECTRICAL SYSTEM (96-00-00)

COPYRIGHT

2007 BY DART AEROSPACE LTD.

THIS DOCUMENT IS PRIVATE AND CONFIDENTIAL AND IS SUPPLIED ON THE EXPRESS CONDITION THAT IT IS NOT TO BE USED FOR ANY PURPOSE OR COPIED OR COMMUNICATED TO ANY
OTHER PERSON WITHOUT WRITTEN PERMISSION FROM DART AEROSPACE LTD.
Revision:
4
Date: 11.06.01
96.8.33.4 Decrease engine speed very slowly
to the point where the amber ROTOR RPM lights
illuminate and a swept-frequency audio signal
(series of audio bursts) is audible in both the pilot
and copilot headsets. This point should be at a
rotor speed (NR) of 96% to 97%; (311 to 314 rotor
rpm) preferably 97%.
96.8.33.5
Decrease engine speed very slowly
to the point where the red ENGINE RPM warning
lights illuminate. This point should be at an
engine speed (N2) of 88% to 91%.
96.8.33.6
Position the LOW RPM audio
switch to OFF. The audio signal should cease.
96.8.33.7
Adjust for an engine speed (N2) of
88% or below. Verify the red ENGINE RPM
warning lights and the amber ROTOR RPM
warning lights are illuminated and the audio signal
is not audible in either pilot or copilot headset.
96.8.33.8
Increase engine speed very slowly
and verify that the red ENGINE RPM warning
lights extinguish above 91% engine rpm (N2).
Continue to increase engine speed very slowly
and verify that the amber ROTOR RPM warning
lights extinguish above 97% rotor rpm (NR).
Verify the LOW RPM audio switch returns
automatically to the AUDIO position when the
amber ROTOR RPM lights extinguish.
96.8.33.9 With rotor in flat pitch set
GOVERNOR switch to MANUAL (
CAUTION: refer
to FMS-D212-725-1, engine run-up and systems
checks, engine fuel control). Slowly increase
throttle until the amber ROTOR RPM warning
lights illuminate. The warning lights should
illuminate at a rotor speed (NR) of 102% to
104.5% (330 to 339 rotor rpm which corresponds
to an engine speed (N2) of 6700 to 6900 rpm).
Verify that the audio warning signal is not audible
in either the pilot or copilot headset.
96.8.33.10 Return GOVERNOR switch to
AUTO. (
CAUTION: refer to FMS-D212-725-1,
engine run-up and systems checks, engine fuel
control).
96.8.34 Adjustment Procedure – RPM
Limit Warning System (Low RPM Warning)
NOTE
IF the RPM limit warning system
does not meet the requirements of
paragraph 96.8.32, the system shall
be adjusted in accordance with the
following procedures.
96.8.34.1
Loosen the screws and slide the
cover strips to expose the potentiometers.
96.8.34.2
Install a jumper lead between TP7
and TP8 to de-activate the engine LOW RPM
signal.
96.8.34.3 Increase rotor speed to
approximately 100% (324 rotor RPM and 6600
engine RPM).
96.8.34.4
Slowly decrease rotor speed to
97%, approximately 314 rotor RPM.
96.8.34.5
If, following step 96.8.34.4, the
amber ROTOR RPM caution light is illuminated,
turn R1 slowly counterclockwise until the warning
light just extinguishes and then very slowly
clockwise until the light illuminates again. If the
amber ROTOR RPM caution light is
extinguished, turn R1 slowly clockwise until the
light just illuminates.
96.8.34.6
Vary the rotor speed slowly above
and below 97% while observing the light. Verify
that the warning occurs at a rotor speed of 96 to
97%. If not, repeat steps 96.8.34.4 through
96.8.34.6.
96.8.34.7
Remove the jumper between TP7
and TP8 and install the jumper between TP6 and
TP8 to deactivate the rotor LOW RPM signal.
96.8.34.8
Adjust for an engine speed of 89.5
% (approximately 5900 engine RPM and 290
rotor RPM).
96.8.34.9
If, following step 96.8.34.8, the red
ENGINE RPM low warning light is illuminated,
turn R3 slowly counterclockwise until the light
just extinguishes, then very slowly clockwise until