20. Power - As required.
9-12. 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 approximated gliding distances in relation to
9-13. LANDING WITH TWO ENGINES IN-
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
wind velocity and direction. When the
condition of the terrain has been noted and the landing area
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
touch-down. Plan to overshoot rather than undershoot,
then use flaps as necessary to arrive at the selected landing
Keep in mind that, with both propellers feathered, the
normal tendency is to overshoot due to less drag. In the
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.
9-14. LOW OIL PRESSURE.
In the event of a low oil pressure indication, perform the
procedures below, as applicable:
1. Oil pressure below 105 PSI below 21,000 feet or 85
PSI at 21,000 feet and above, torque - 49%
2. Oil pressure below 60 PSI - Perform engine
shutdown, or land as soon as practicable using
minimum power to ensure safe arrival.
9 - 1 5 . C H I P D E T E C T O R W A R N I N G
If the L CHIP DET or R CHIP DET warning
annunciator illuminates, and safe single-engine flight can
be maintained, perform the following:
2. Land as soon as practicable.
1. Perform engine shutdown.
9-16. DUCT OVERTEMP CAUTION LIGHT
Insure that the cabin floor outlets are open and
unobstructed, then perform the following steps in sequence
until the light is extinguished. After completion of steps 1.
through 4., if the light does not extinguish, allow
approximately 30 seconds after each adjustment for the
system temperature to stabilize. The overtemperature
condition is considered corrected at any point during the
procedure that the light goes out.
1. Cabin air control - In.
2. Cabin temperature mode switch - AUTO.
3. Cabin temperature rheostat - Full decrease.
4. Vent blower switch - HI.
5. Cabin temperature mode switch - MAN HEAT.
6. Manual temperature switch - DECREASE (hold).
7. Left bleed air valve switch - ENVIRO OFF.
8. Light still illuminated (30 seconds) - Left bleed air
valve switch - OPEN.
9. Right bleed air valve switch - ENVIRO OFF.
10. Light still illuminated (30 seconds) - Right bleed air
valve switch - OPEN.
N O T E
If the overtemperature light has not extinguished
after completing the above procedure, the
warning system has malfunctioned.
9-17. ICE VANE FAILURE.
Ice vane failure is indicated by VANE FAIL caution
light illumination. If an ice vane fails to operate
electrically, perform the following:
Change 3 9-5