CHAPTER 28
PAGE 7
MAINTENANCE MANUAL EXTRA 300/SC
PAGE DATE: 16. June 2008
28-10-00 STORAGE
Description and Operation
The EXTRA 300/SC is equipped with two independent fuel
systems: The acro- and center tanks system and the wing tank
system.
The acro tank (1, Figure 2) incorporating an inverted flight
fuel supply system is mounted in the fuselage just behind the
firewall. It is connected to the front (2) and rear (3) center
tank by flexible hoses. The acro and center tanks are fastened
to the fuselage by means of metal attachment belts (5).
Fueling the center tanks is by means of two fuselage 2"
diameter filler caps. For leak detection the acro and center
tanks are furnished with a GRP tank shell. In case of leakage
blue colored fuel is shining through. The acro and center
tanks are grounded. The acro tank deaerates (6) into the rear
center tank. Both center tanks deaerate by ventilation tubes
(6) ending at the right side of the main landing gear spring.
The root section of each wing – in front of the main spars –
forms an integral fuel tank of approximately 150 cm (59")
length (4). Each wing tank has a 2" diameter filler cap for
gravity fueling. Sealing lips are installed at the filler necks
inside the wingtank. For sealing 3M Brand Fuel Resistant
Coating 776
(3M, St. Paul, USA) has been applied to the
inside of the wing tanks. For lightning protection reason the
shell in the area of the wing tank has an outer layer of carbon
fiber with incorporated aluminium thread (also refer to
Chapter 57). The wing tanks are grounded. Each tank is
provided with an alu ventilation tube (6) for adequate venting.
The ventilation tubes are interconnected to a main tube (6),
ending outside of the fuselage at the right side of the main
landing gear spring.
PAGE DATE: 29. May 2009
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