TM 1-1520-240-MTF
2-83
IN-FLIGHT (CONT.)
a. Autorotation RRPM — Check as follows.
(1) Stabilize airspeed 75$5 knots.
(2) EMERG ENG TRIM, AUTO MANUAL
switches covers — UP, switches to
Manual.
(3) Thrust Control — Reduce to ground
detent
while
decreasing
manual
switches to maintain RRPM at 100%.
(4) Reduce thrust to full down while
decreasing
EMERG
ENG
TRIM
INC/DEC
switches
—
DEC
as
necessary until both engine N1 speeds
are between 60 and 70%.
(5) When stabilized in autorotation with
Thrust Control Lever — Full Down, Note
following data: (Refer to section V).
(a)
RRPM.
(b)
Pressure Altitude (PA).
(c)
Pedal — 1 inches maximum
separation.
(d)
Unusual Vibrations.
(6) Accomplish Power Recovery prior to
1000’ AGL.
(a)
Load Rotor by relaxing pressure on
Thrust Control Lever allowing it to
come up as required if RRPM is
above 100%.
(b)
EMERG
ENG
TRIM,
AUTO
MANUAL switches — AUTO
(covers down, one at a time).
(c)
Reestablish 100% RRPM, safe
airspeed, and altitude.
