Fuel Selectors Off Warning System - Textron Cessna Grand Caravan Ex 208B Pilot's Operating Handbook And Faa Approved Airplane Flight Manual

CESSNA
MODEL 208B 867 SHP
GARMIN G1000
FUEL SYSTEM

FUEL SELECTORS OFF WARNING SYSTEM

A fuel selectors off warning system is incorporated to alert the pilot if
one or both of the FUEL TANK SELECTORS are in the OFF position
inadvertently. The system included redundant warning horns, a red
FUEL SELECT OFF annunciation of the selected tank, actuation
switches, and miscellaneous electrical hardware. The dual aural
warning system is powered through the START CONT circuit breaker
with a non-pullable FUEL SEL WARN circuit breaker installed in series
to protect the integrity of the start system.
The warning system functions as follows:
1. If both the LEFT and RIGHT FUEL TANK SELECTORS are in
the OFF position (fuel tank shutoff valves are closed), the red
FUEL SELECT OFF annunciator illuminates and one of the fuel
selector off warning horns is activated;
2. During an engine start operation (STARTER switch in START or
MOTOR position) with either the left or right fuel tank selectors
in the OFF position, the red FUEL SELECT OFF annunciator
illuminates and both of the fuel select off warning horns are
activated;
3. With one fuel tank selector in the OFF position and fuel
remaining in the tank being used is less than approximately 25
gallons, the red FUEL SELECT OFF annunciator illuminates
and one of the fuel selector off warning horns is activated.
The warning system has the ability to annunciate which fuel selector is
selected off by displaying OFF next to the respective fuel quantity
indicator on the EIS. There is no annunciation when the fuel selector is
turned ON.
If the FUEL SEL WARN circuit breaker has popped or the START
CONT circuit breaker has been pulled (possible for ground
maintenance), the red FUEL SELECT OFF annunciator will be
illuminated even with both fuel tank selectors ON. This is a warning to
the pilot that the fuel selector warning system has been deactivated.
A test switch, labeled TEST SWITCH, FUEL SELECT OFF - DN, is
located on the lower left corner of the instrument panel. When this
switch is placed in the DOWN position, the two warning horns will
sound simultaneously indicating that the fuel selector warning horns
are operational.
208BPHCUS-00
AIRPLANE AND SYSTEMS DESCRIPTION
(Continued)
SECTION 7
7-81
U.S.