Extra 300LX, Maintenance Manual

Page: 217 / 515

CHAPTER 28
PAGE 7 PAGE DATE: 1. March 2011
MAINTENANCE MANUAL EXTRA 330LX
28-10-00 STORAGE
The EXTRA 330LX is equipped with two independent fuel
systems: The center- and acro tank 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 by a flexible hose to the center tank
(2) which is mounted in front of the main spar area. Fueling
the center and acro tank is done by means of the fuselage 2"
diameter filler cap (5). For leak detection purposes the
center and the acro tank are furnished with a GRP tank shell.
In case of leakage blue colored fuel is shining through. The
center and the acro tank are electrically bonded. The acro
tank deaerates (a) into the center tank that itself deaerates by
a ventilation tube (b) 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 (4). Each wing tank has a 2"
diameter filler cap (5) for gravity fueling. Sealing lips are
installed at the filler necks inside the wing tank. 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 reasons the shell in the area of the wing tank has
an outer layer of carbon fiber with incorporated aluminium
thread (3). The wing tanks are grounded. Each tank is pro-
vided with an aluminum ventilation tube (c) for adequate
venting. The ventilation tubes are interconnected to a main
tube (d), ending outside of the fuselage at the right side of the
main landing gear spring.