Emergency Power Lever
The emergency power lever is connected, through linkages, to the manual
override lever on the fuel control unit and allows manual governing of the
engine fuel ow should a malfunction occur in the fuel control unit’s pneumatic
governing system.
When the engine is operating, a failure of any fuel control unit pneumatic
governing signal input will result in the fuel ow decreasing to minimum idle
(approximately 48%
at Sea Level and increasing with altitude). The
emergency power lever allows restoration of engine power in the event of
such a failure. NORMAL and MAX positions are provided for the emergency
power lever. The NORMAL position is used for all normal engine operations
when the fuel control unit is functioning normally and engine power is selected
through the power lever. The range from NORMAL to MAX governs engine
power and is used when a malfunction has occurred in the pneumatic
governing system of the fuel control unit and the power lever is ineffective. A
mechanical stop in the lever slot requires that the emergency power lever be
moved to the left to clear the stop before it can be moved forward, out of the
NORMAL (full aft) position, and into the override position.
Control Quadrant Friction Lock
A quadrant friction lock is installed on the right side of the control pedestal. It
is provided to help minimize creeping of the engine controls once they have
been set. The lock is a knurled knob which increases friction on the engine
controls when it is rotated clockwise.
NOTE: The EMER PWR LVR annunciator will illuminate whenever the
lever is not stowed in its NORMAL position. This precaution is provided to
prevent starting the engine with the emergency power lever inadvertently
placed in any position other than NORMAL.
CAUTION: When the fuel control manual override system is in use,
engine response may be more rapid compared to using the normal power
lever. Additional care should be taken during engine acceleration to avoid
exceeding the engine limitations.
CAUTION: The emergency power lever/manual override system is
considered an emergency system and should only be used in the event of
a fuel control unit governing malfunction. When attempting a normal start,
ensure the emergency power lever is in the NORMAL (full aft) position;
otherwise, an over-temperature (hot-start) condition may result.
NOTE: When using the emergency power lever, 100% power may not be
obtainable.
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