CHAPTER 28
PAGE 6
PAGE DATE: 1. March 2011
MAINTENANCE MANUAL EXTRA 330LX
8 When a fuel tank is opened for repair, air ventilation (refer
to next paragraph) should be provided immediately to re-
duce vapor concentrations.
9 When draining fuel, ensure that suitable containers are avail-
able and that drained fuel is stored safely. Do not allow fuel
to drip on the ground and form pools.
10 If it is necessary to ventilate a tank when the aircraft is in a
hangar, ensure that vapors do not accumulate to explosive
or toxic levels in the hangar.
W A R N I N G When fuel is being drained, there is little control over
the release of fuel vapor. This vapor should be dissi-
pated as quickly as possible. Compressed air or explo-
sion-proof blowers may be used for the purpose.
Air Ventilation
1 Completely drain the fuel system as per chapter 12-10-02.
2 Remove inspection doors (refer to chapter 28-11-04) and
tank caps.
3 Use compressed air or an explosion-proof blower to blow
air into the tank until tank interior is dry and free of vapor.
4 Continue ventilation whenever tank is open and being worked
on.
W A R N I N G If flammable vapors from cleaning solvents are allowed
in the tank increase air circulation to dissipate them.
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