T B M
PILOT’S INFORMATION MANUAL 700
SECTION 7
DESCRIPTION
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Page 7.7.12
Rev. 5
FUEL SYSTEM DRAINING AND CLOGGING INDICATOR (Figure 7.7.4)
The fuel system comprises five drain points, a drain on the filter bowl, two
drain valves on each tank, located on wing lower surface, on wing root side.
These drains allow draining water or sediments contained in fuel.
Fuel tank drain valves are provided with a slot which allows opening them
with a screwdriver.
Fuel system draining shall be performed prior to the first flight of the day and
after each tank refueling, using a sampler to pick off fuel at the two drain
valves of each tank and at the filter vent valve.
A red filter bypass flag on the fuel unit and visible from outside through a lens
located on L.H. side under front baggage compartment indicates filter
clogging. This indicator shall be observed during preflight inspection.
NOTE :
When filter gets clogged in flight, the filter is by–passed in order not to deprive
power plant from fuel. The power plant is then supplied with non–filtered fuel.
Figure 7.7.4 (1/2) – FUEL SYSTEM DRAINING POINTS AND
CLOGGING INDICATOR
1) Clogging indicator
2) Lens
3) Central access door
4) Filter drain
5) Tank drain
6) Drain bowl
Valid from S/N 1 to 92
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