Pilot's Operating Handbook
Section 7
Description
Edition 0 - March 05, 2019
Rev. 3
Page 7.8.11
Fuel system draining and clogging indicator
- see figure 7.8.4
The fuel system comprises five drain points, a drain on the filter bowl, two drain valves
on each tank, located on wing lower surface, one at wing root and the other past main
landing gear well.
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.
▲
CAUTION
▲
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, when an inspection
door located on L.H. side under front baggage compartment is open, indicates filter
clogging. A push-button, adjacent to the inspection door, controls the illumination of a
light provided to improve visibility of the clogging indicator. 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
powerplant from fuel. The powerplant is then supplied with non-filtered fuel.
●
PIM - DO NOT USE FOR FLIGHT OPERATIONS