B HOVER (CONT.)
Ensure that no aircraft limitations are exceeded
during this maneuver. The goal is to obtain the
maximum torque without endangering the aircraft
or crew (70-100%). Depending on conditions i.e.
aircraft gross weight and DA the check may be
performed on the ground.
712 Torque Differential Check.
(1) While stable on the ground, flat pitch,
100% RRPM move No. 2 ECL to the
Ground detent. Increase RRPM to
100% using beep No. 1 and No. 2
switch. Increase thrust until aircraft is
stabilized at 5 to 20 foot aft wheel height
while maintaining RRPM at 100%.
Record TRQ and N1 values on No. 1
engine when stabilized.
(2) Maintaining a constant thrust position
slowly bring the No. 2 ECL to the FLT
maintaining the RRPM at 100% with the
No. 1 and No. 2 beep trim switch.
Reduce No. 1 ECL smoothly to the
ground position while maintaining 100%
RRPM with the No. 1 and 2 beep trim
switch. When No. 1 ECL is at the GND
position record TRQ and N1 values on
No. 2 engine.
(3) Smoothly decrease thrust to ground
detent while maintaining 100% RRPM
with No. 1 and No. 2 beep switch.
Decrease RRPM to minimum beep
using 1 and 2 beep switch. Advance No.
1 ECL to flight position. Beep RRPM to
(4) Difference will be no greater than 6%
between No. 1 and No. 2 ENG TRQ