TM 55-1510-220-10
(15.)
Cabin temperature mode selector switch - As
required.
(16.)
Electrical equipment - As required.
(17.)
Autoignition switch - ARM.
18.
Propellers - Synchronize.
19.
Power - As required.
k.
Engine Restart During Flight (Not Using Starter).
A restart without starter assist may be accomplished
provided airspeed is at or above 140 KIAS, altitude is
below 20,000 feet, and the propeller is not feathered. If
altitude permits, diving the aircraft will increase N
1
and
assist in restart. N
1
required for airstart should be at or
above 9%. If a start is attempted, perform following:
(1.)
Cabin temperature mode selector switch -
OFF.
(2.)
Electrical load - Reduce to minimum.
(3.)
Generator switch (affected engine) - OFF.
4.
Fire pull handle - Check in.
5.
Power lever - IDLE.
6.
Propeller lever - HIGH RPM.
7.
Condition lever - FUEL CUTOFF.
8.
Airspeed - 140 KIAS minimum.
9.
Altitude below 20,000 feet - Check.
(10.)
Engine autoignition switch - ARM.
11.
Condition lever - LOW IDLE.
NOTE
If N
1
is below 12%, starting temperatures
tend to be higher than normal. To preclude
overtemperature (1000°C or above) during
engine
acceleraton
to
idle
speed,
periodically move the condition lever into
FUEL CUTOFF position as necessary.
NOTE
If a rise in TGT does not occur within 10
seconds after moving the condition lever to
LOW IDLE, abort the start.
12.
TGT - Monitor (1,000°C for 5 seconds
maximum).
13.
Oil pressure - Check.
(14.)
Generator switch - RESET, then ON.
(15.)
Engine Cleanup - Perform if engine restart
unsuccessful.
(16.)
Cabin temperature mode selector switch - As
required.
(17.)
Electrical equipment - As required.
(18.)
Autoignition switch - ARM.
19.
Propellers - Synchronized.
20.
Power - As required.
l.
Maximum Glide. In the event of failure of both
engines, maximum gliding distance can be obtained by
feathering both propellers to reduce propeller drag and by
maintaining the appropriate airspeed with the gear and
flaps up. Figure 9-2 gives the approximate gliding
distances in relation to altitude.
m.
Landing With Two Engines Inoperative. Maintain
best glide speed (figure 9-2). If sufficient altitude remains
after reaching a suitable landing area, a circular pattern
will provide best observation of surface conditions, wind
velocity, and direction. When the condition of the terrain
has been noted and the landing area selected, set up a
rectangular pattern. Extending APPROACH flaps and
landing gear early in the pattern will give an indication of
glide performance sooner and will allow more time to
make adjustments for the added drag. Fly the base leg
as necessary to control point of touchdown. Plan to
overshoot rather than undershoot, then use flaps as
necessary to arrive at the selected landing point. Keep in
mind that, with both propellers feathered the normal
tendency is to overshoot due to less drag. In event a
positive gear-down indication cannot be determined,
prepare for a gear-up landing; also, unless the surface of
the landing area is hard and smooth, the landing should
be made with the landing gear up. If landing on rough
terrain, land in a slightly tail-low attitude to keep nacelles
from possibly digging in. If possible, land with flaps fully
extended.
9-8. LOW OIL PRESSURE.
In the event of a low oil pressure indication, perform
the procedures below as applicable:
9-5
