XtremeAIR XA41, Maintenance Manual, Page: 135 / 284

Maintenance Manual XA41/XA42
AMM-XA42-0040-001 C.00
Page date: Page 3
25.09.2018 Chapter 28
WARNING
For refueling, defueling or fuel drainage instructions; refer to chapters 12-10-01 thru 12-10-
03. Obey the warnings and cautions of the related chapters.
Obey these instructions during all maintenance procedures on the fuel system. Fuel and fuel
tank vapors can cause accidents.
1 Only personnel who do work on the aircraft are permitted to stay in the area around
the aircraft.
2 No other maintenance work is permitted during work on the fuel system.
3 When a fuel tank is opened for repair, start the ventilation immediately.
4 When you drain fuel, make sure that applicable containers with the correct
dimensions are available. Keep the fuel in safe storage. Remove fuel vapors as
quickly as possible.
To remove fuel vapors from an open tank for the maintenance work:
1 Blow compressed air into the tank until the internal space is dry and without fuel
vapors.
2 Always make sure that there is good airflow when the tank is open during
maintenance work.
28-10-00 STORAGE
28-10-01 Acro Tank
The acro tank is installed in the forward center fuselage. It is attached with two bolts on
each side to the side walls of the fuselage tank compartment. Shims might be installed
between the tank attachments and the tank walls. The support structure around the acro
tank holds it in position. The tank filler neck is connected to a bonding cable. A tank drain
valve is accessible from the bottom of the fuselage in front of the main spar. For a
description of the tank ventilation system, refer to chapter 28-10-04.
The acro tank has two compartments. A tube connects the top compartment to the bottom
compartment. So that a continuous fuel supply is possible during an inverted flight or
negative G maneuvers. The outlet is on the forward side of the bottom compartment. The
outlet is connected to a flop tube (refer to chapter 28-10-02) on the internal side of the
tank.
The internal side of the tank is sealed; refer to chapter 51-30-06 for the sealant
specification.
To remove the acro tank:
1 Drain the acro tank, refer to chapter 12-10-03.
2 Disconnect all fuel hoses, bonding cables and electronic wiring.
3 Remove the engine, refer to chapter 72-10-00.
4 Remove the engine mount, refer to chapter 71-20-00.
5 Remove the metal sheet of the fire wall, refer to 71-30-00.
6 Disassemble the filler neck.