What a Volcano Can Do to an Airliner

In 1982, a Boeing 747 was being flown by British Airways from Kuala Lumpur to Perth on one leg of a London to Auckland flight. They were well over the ocean when strange things started happening.

 The passenger compartment started filling up with blue smoke, even though there was no fire detected on board. Then the crew started seeing bluish flickering lights. 

They recognized St. Elmo's fire, but had never seen it so strong.

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