Boeing  signaled in a regulatory filing that it might soon end production of  747. The double-deck jet — known as the Queen of the Skies — revolutionized air travel by making it more affordable for the masses. The giant jet once stood alone, with more seats than any other jet and a range of 6,000 miles, longer than any other plane.
But its four engines and massive size are now seen as negatives — it burns too much fuel and airlines struggle to fill flights with 400 or more passengers. Slowing freight traffic has meant few orders for the cargo version of the plane.