SECTION 7
DESCRIPTION
SOCATA
MODEL TB 20
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socata
. It is supplied in
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It must not be used for any purpose other than that for which it is supplied, nor
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Information in this document is subject to change without notice.
© 1988, 1991, 1992, 1994 to 1996, 1997, 2000 -
socata
- All rights reserved
June 30, 1988
Revision 7
7.37
Fuel quantities :
– Total maximum :
88.8 U.S Gal (336 l)
– Total usable
:
86.2 U.S Gal (326 l)
– Unusable
:
2.6 U.S Gal
(10 l)
In cruise flight, a continuation of fuel flow must be assured as the new tank is
being selected. When switching from one tank to the other, place the auxiliary
fuel pump switch momentarily in the ”ON” position until normal fuel flow has
been restored.
Each fuel tank is equipped with its own ventilation system, an essential
element in the operation of the fuel system. Should a vent become blocked,
the fuel flow from the tank concerned is reduced and the engine may cut out.
The ventilation is ensured by ducts which run to the lower surface of each
wing.
The quantity of fuel is measured by four electric gage transmitters (two in
each wing) and is displayed by two level indicators located at the top of the
central console.
The indicators are graduated in 1/4, 1/2, 3/4 and 4/4, with the zero indicating
an empty tank. When the pointer of the indicator is at zero, approximately
1.3 U.S. Gal (5 litres) of unusable fuel remains in the tank.
The indicators cannot be relied upon for accurate readings during skids, slips
or unusual attitudes. If both indicator pointers should rapidly move to a zero,
check voltmeter and oil temperature indicators. If they are not indicating, an
electrical malfunction has occurred.
A low level warning light (if installed), located on the advisory panel, comes
on whenever fuel quantity, remaining in one of both tanks, (airplane in line of
flight) reaches approximately 7.9 U.S. Gal (30 litres). In this configuration, the
warning light illumination is controlled by a low level detector, located in each
tank.
The auxiliary fuel pump is controlled by a switch–breaker located on front part
of pedestal.
An indicator light located on the advisory panel shows operation of the
auxiliary pump.
