TM 1-1510-225-10
8A-18
6. Radar altimeters – As required.
7. Altimeters – Set to current setting.
O
8. TCAS – Set as required.
H
9. Arrival briefing – Complete.
8A-38. DESCENT.
Descent from cruise 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 pressure controller should be
adjusted prior to starting descent.
a. Descent – Maximum 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.
While
descending, adjust rate control knob so
that cabin rate of descent equals one-third
aircraft rate of descent.
2. CABIN signs – As required.
3. POWER levers – IDLE.
4. PROP levers – HIGH RPM.
5. GEAR – UP.
6. FLAPS – UP.
7. Airspeed – Vmo maximum.
8. ICE
PROTECTION switches – As
required.
9. RECOG lights – As required.
O
10. Ferry fuel caps – Loosen or remove if rate
of descent exceeds 1500 fpm.
b. Descent – Maximum 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 a slower airspeed. To perform, use the
following procedure:
1. Cabin pressurization – Set. Adjust cabin
controller
dial
as
required.
While
descending, adjust rate control knob so
that cabin rate of descent equals one-third
aircraft rate of descent.
2. CABIN signs – As required.
3. POWER levers – IDLE.
4. PROP levers – HIGH RPM.
5. FLAPS – APPROACH.
6. GEAR – DN.
7. Airspeed – 181 KIAS maximum.
8. ICE
PROTECTION switches – As
required.
9. RECOG lights – As required.
O
10. Ferry fuel caps – Loosen or remove if rate
of descent exceeds 1500 fpm.
8A-39. APPROACH.
1. HSI NAV SOURCE – As required.
a. Ensure the correct navigational source for
the approach has been selected.
O
2. TCAS – Set as required.
8A-40. BEFORE LANDING.
1. CABIN Signs – NO SMOKE & FSB.
2. AUTOFEATHER – ARM.
3. BRAKE DEICE – As required.
4. PROP levers – As required.
NOTE
During approach, propellers should be set
at 1900 RPM to prevent glideslope
interference (ILS approach), provide better
power response during approach, and
minimize attitude change when advancing
propeller levers for landing.
5. FLAPS (below 200 KIAS) – APPROACH.
6. GEAR (below 181 KIAS) – DN/confirm.
7. LANDING/TAXI LIGHTS – As required.
8. CONDITION levers – HIGH IDLE.
