SECTION 7
DESCRIPTION
T B M
700 PILOT’S INFORMATION MANUAL
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Page 7.7.1
Rev. 6
7.7 – FUEL SYSTEM (Figure 7.7.1)
The fuel system comprises fuel tanks, fuel unit, selectors (manual and
automatic), electric boost pump and main booster pump, engine fuel system,
gaging installation, checking installation and drains.
FUEL TANKS
Fuel tanks are formed by sealed casings in each wing. Each fuel tank
comprises a filling port located at the end of wing upper surface, two drain
valves located at the lower surface (one near main landing gear, on trailing
edge side, the second one on wing root side, on leading edge), a vent valve
located on the lower surface, a suction strainer and three level gages.
FUEL UNIT
The fuel unit combines shut–off valve, tank selector and filter functions. It is
connected to the manual selector through a mechanical control. The fuel filter
system is located in a bowl at the lower part of the unit. It is fitted with a
by–pass valve, a contamination indicator and a drain valve.
TANK MANUAL SELECTOR (Figure 7.7.2)
The tank manual selector is located on the pedestal rear face. It allows
selecting the tank (”R” or ”L”) to be used and setting unit to ”OFF”. To change
from ”L” position to ”OFF” position, turn the selector clockwise (”L” → ”R” →
”OFF”) ; change from ”R” position to ”OFF” position requires a voluntary
action from the pilot (pull and turn). The ”pull and turn” maneuver prevents
involuntary operation. When the unit is set to ”OFF”, the ”FUEL OFF” warning
light on advisory panel remains illuminated.
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