Cessna 182T 2001, Pilot Operating Handbook

Page: 204 / 254

SECTION 7 CESSNA
AIRPLANE & SYSTEMS DESCRIPTION MODEL 182T
It is not necessary to operate the auxiliary fuel pump operating
during normal takeoff and landing, since gravity and the engine-
driven pump will supply adequate fuel flow. In the event of failure of
the engine-driven fuel pump, use of the auxiliary fuel pump will
provide sufficient fuel to maintain flight at maximum continuous
power.
FUEL RETURN SYSTEM
A fuel return system was incorporated to improve engine
operation during extended idle operation in hot weather
environments. The major components of the system include and
orificed fitting located in the top of the fuel servo, a dual stack fuel
selector, and a drain valve assembly. The system is designed to
return fuel/vapor back to the main tanks at approximately 7 gallons
per hour. The dual stack selector ensures that fuel returns only to
the tank that is selected as the feed tank. For example, if the fuel
selector is positioned to use fuel from the left hand tank, the fuel
return system is returning fuel to the left hand tank only.
FUEL VENTING
Fuel system venting is essential to system operation. Complete
blockage of the venting system will result in decreasing fuel flow
and eventual engine stoppage. Venting consists of an
interconnecting vent line between the tanks and check valve
equipped overboard vents in each tank. The overboard vents
protrude from the bottom surfaces of the wings behind the wing
struts, slightly below the upper attach points of the struts. The fuel
filler caps are vacuum vented; the vents will open and allow air to
enter the fuel tanks in case the overboard vents become blocked.
FUEL SELECTOR VALVE
The fuel selector is a four-position selector valve, labeled BOTH,
RIGHT, LEFT and OFF. The selector handle must be pushed down
before it can be rotated from RIGHT or LEFT to OFF. The top
portion of the valve is the return portion of the valve, while the
bottom portion of the valve is the supply portion. Each side is
isolated from the other.
7-30 Apr 30/01