2.
3.
Electrical load - Reduce to minimum.
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, is below 12%, starting temperatures
tend to be higher than normal. To pre-
clude overtemperature (1000°C or above)
during engine acceleration 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.
13.
14.
15.
16.
17.
18.
19.
20.
TGT - Monitor (1 ,OOO”C for 5 seconds
maximum).
Oil pressure - Check.
Generator switch - RESET, then ON.
Engine Cleanup - Perform if engine
restart unsuccessful.
Cabin temperature mode selector
switch - As required.
Electrical equipment - As required.
Autoignition switch - ARM.
Propellers - Synchronized.
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 alti-
tude.
Maizain
m. Landing With Two Engines Inoperative.
best glide speed (figure 9-2). If sufficient
TM 55-1510-221-10
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 feath-
ered the normal tendency is to overshoot due to less
drag. In event a positive gear-down indication can-
not 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 pos-
sibly digging in. If possible, land with flaps fully
extended.
9-8. LOW OIL PRESSURE.
In the event of a low oil pressure indication, per-
form the procedures below as applicable:
1.
Oil pressure below 105 PSI below 21,000
feet or 85 PSI 21,000 feet and above, torque
- 49% maximum.
2.
Oil pressure below 60 PSI - Perform engine
shutdown, or land as soon as practicable
using minimum power to insure safe arrival.
9-9. CHIP DETECTOR WARNING LIGHT ILLUMI-
NATED.
If a L CHIP DETR or a R CHIP DETR warning
light illuminates, and safe single-engine flight can be
maintained; perform engine shutdown.
9-10. DUCT OVERTEMP CAUTION ANNUNCIA-
TOR LIGHT ILLUMINATED.
If a DUCT OVERTEMP caution annunciator
light is illuminated, insure that the cabin floor out-
lets are open and unobstructed, then perform the
following steps in sequence until the light is extin-
guished. After completion of steps 1 thru 4, if light
does not extinguish, Allow approximately 30 sec-
onds after each adjustment for the system tempera-
ture to stabilize. The overtemperature condition is
considered corrected at any point during the proce-
dure that the light extinguishes.
1.
Cabin air control - In.
9-5
