And after all that investigation, how many 747’s were grounded to correct that possible short in the fuel tank? Answer: absolutely none.
As you say.
“And after all that investigation, how many 747s were grounded to correct that possible short in the fuel tank? Answer: absolutely none.”
Not only that, but if they really thought it was a spark in the fuel tank, it would be very easy to rectify by just flooding the tank with nitrogen as the fuel was pumped out. That could be done with off the shelf components... A scuba regulator and a tank of nitrogen.
How many Airbus A330's were grounded after the Air France flight went missing? Answer: absolutely none. How many DC-10s were grounded after that United Flight lost its center engine and crashlanded at Sioux City, Iowa? Answer: absolutely none. How many MD-11s were grounded after that Swissair flight went down off Canada in 1998? Answer: absolutely none. How many 767s were grounded when that Lauda Air flight broke up over Malaysia? Answer: absolutely none. How many A320s were grounded after that Indonesian Air filght went down in December? Answer: absolutely none.
They don't ground airplanes. Not without specific reason.