As aircraft fly through the air, the friction causes them to become charged with static electricity. After an aircraft has landed there is a possibility of charges escaping to earth as a spark. Therefore, the aircraft should be earthed with a conductor as soon as it lands, allowing the charge that has built up to flow to earth.
when aircraft land ,by friction charges has developed on it.it can cause fire so after landing it soon earthed
Front wheel bearings in a car should be well greased but have never heard of them needing to be earthed.
to ensure safety
Earthed to the Ground was created in 1984-05.
ALL electrical appliances or devices should be grounded !
yes
There is no need to. The manufacturer designed the appliance for the specification of not needing a ground to be connected to it.
no
no
At all times during operation of the aircraft.
No.
Iraq