TBM
PILOT’S OPERATING HANDBOOK
700
SECTION 7
DESCRIPTION
Page 7.7.12
Edition 1 -- November 30, 2010
Rev. 0
FUEL SYSTEM DRAINING AND CLOGGING INDICATOR
(Figure 7.7.4A)
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.
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
power plant from fuel. The power plant is then supplied with non--filtered fuel.
Valid from S/N 93 to 9999
