TM 55-1510-220-10
(5)
Engine instrument indications - Check all
engine instruments for normal indications.
6.
Recognition lights - As required.
8-44. DESCENT.
Descent from cruising altitude should normally be
made by letting down at cruise airspeed with reduced
power. Refer to Chapter 7 for power settings and rates of
descent.
NOTE
Cabin altitude and rate-of-climb controller
should be adjusted prior to starting
descent.
a.
DESCENT MAX RATE (CLEAN). To obtain the
maximum rate of descent in clean configuration, perform
the following:
(1.)
Cabin
pressurization
Set
Adjust
CABIN
CONTROLLER dial as required and adjust
RATE control knob so that cabin rate of descent
equals one-third aircraft rate of descent
2.
Power levers IDLE.
3.
Propeller levers HIGH RPM.
4.
Flaps UP.
5.
Gear UP.
6.
Airspeed V
mo
.
(7.)
Ice & rain switches - As required.
8.
Recognition lights - As required.
b.
DESCENT
-
MAX
RATE
(LANDING
CONFIGURATION). If required to descend at a low
airspeed (e.g., to conserve airspace or in turbulence),
approach flaps and landing gear may be extended to
increase the rate and angle of descent while maintaining
the slower airspeed. To perform the maximum rate of
descent in landing configuration, perform the following:
(1.)
Cabin
pressurization
Set.
Adjust
CABIN
CONTROLLER dial as required and adjust
RATE control knob so that cabin descent rate
equals one-third aircraft descent rate.
2.
Power levers - IDLE.
3.
Propeller levers - HIGH RPM.
4.
Flaps - APPROACH.
5.
Gear - DN.
6.
Airspeed - 184 KIAS maximum.
(7.)
Ice & rain switches - As required.
8.
Recognition lights - As required.
8-45. DESCENT-ARRIVAL.
Perform the following checks prior to the final descent
for landing.
(1)
Cabin pressurization - Set. Adjust CABIN
CONTROLLER dial as required.
(2)
Ice & rain switches - As required.
(3)
Windshield anti-ice - As required.
NOTE
Set windshield anti-ice to normal or high as
required well before descent into icing
conditions or into warm moist air to aid in
defogging. Turn off windshield anti-ice
when descent is completed to lower
altitudes and when heating is no longer
required. This will preclude possible wind
screen distortions.
4.
Recognition lights - ON.
5.
Altimeters - Set to current altimeter setting.
(6.)
Flare/chaff dispenser arm-safe switch - SAFE.
(7.)
Flare/chaff dispenser safety pin (electronic
module) - Insert
8.
Crew briefing - Complete.
8-46. BEFORE LANDING.
1.
Propeller synchronization switch - OFF.
(2)
Autofeather switch - ARM.
3.
Propeller levers - As required.
NOTE
During approach, propellers should be set
to
1900
RPM
to
prevent
glideslope
interference (ILS approach), provide better
power response during approach, and
minimize attitude change when advancing
propeller levers for landing.
4.
Flaps (below 202 KIAS)- APPROACH.
5.
Gear - DN.
6.
Landing lights - As required.
(7.)
Brake de-ice - As required.
Change 6 8-21
