JS1 Jet Sustainer Flight Manual Supplement - Issue 1
Date of issue: 31.03.2016
Accepted section
Page 4–22
4.7.4. De-fueling
Defueling may be required for maintenance purposes, replacement of
old fuel or when fuel probe calibration is required.
Defueling is performed using the same procedure and hardware as
with refueling. Reverse flow is achieved by changing the tube
connected to the refueling point in the jet box to the “IN” quick
connector and connecting the tube from the “OUT” connector to an
empty container.
After the fuel has been pumped from the tanks, approximately one litre
will still remain in the main tanks. This fuel can be drained through the
drain valve in the wheel box behind the main wheel.
CAUTION:
Ensure the fuel container has adequate capacity for the
amount of fuel to be removed from the glider’s fuel tanks.