Despite A Variety of Viewpoints, the FAA Charges Ahead on Revision 6
The FAA issued a final rule airworthiness directive regarding lighting protection on the Boeing 777, requiring all operators of the type to make changes to their fuel system in order to retain compliance. The AD addresses "arcing inside the main and center fuel tanks in the event of a fault current or lightning strike" which could quickly ignite flammable fuel vapors inside to the complete loss of the aircraft.
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