CESSNA SECTION 7
MODEL 182T AIRPLANE & SYSTEMS DESCRIPTION
The fuel quantity indicators also incorporate warning circuits
which can detect low fuel conditions and erroneous transmitter
signals. Anytime fuel in the tank drops below approximately 8
gallons (and remains below this level for more than 60 seconds),
the amber LOW FUEL message will flash on the annunciator panel
for approximately 10 seconds and then remain steady. The
annunciator cannot be turned off by the pilot. If the left tank is low,
the message will read L LOW FUEL. If the right tank is low, the
message will read LOW FUEL R. If both tanks are low, the message
will read L LOW FUEL R.
In addition to low fuel annunciation, the warning circuitry is
designed to report failures with each transmitter caused by shorts,
opens. If the circuitry detects any one of these conditions, the fuel
level indicator needle will go to the OFF position (below the "0"
mark on the fuel gauge), and 60 seconds later the amber
annunciator will illuminate. If the left tank transmitter has failed, the
message will read L LOW FUEL. If the right tank transmitter has
failed, the message will read LOW FUEL R. If both tanks
transmitters have failed, the message will read L LOW FUEL R.
Fuel flow is measured by use of a fuel transducer (flowmeter)
mounted on the centerline of the engine in front of the fuel
distribution unit. This flowmeter produces an electrical signal which
is translated in the cockpit-mounted indicator as gallons-per-hour.
Normal operating (green arc) range is from 0 to 18 gallons-per-hour
with a step at 16 gallons-per-hour.
AUXILIARY FUEL PUMP OPERATION
The auxiliary fuel pump is used primarily for priming the engine
before starting. Priming is accomplished through the fuel injection
system. If the auxiliary fuel pump switch is accidentally placed in the
ON position for prolonged periods (with master switch turned on and
mixture rich) with the engine stopped, the engine may be flooded.
The auxiliary fuel pump is also used for vapor suppression in hot
weather. Normally, momentary use will be sufficient for vapor
suppression; however, continuous operation is permissible if
required. Turning on the auxiliary fuel pump with a normally
operating engine pump will result in only a very minor enrichment of
the mixture.
Apr 30/01 7-29
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