Some great women go on making headlines long after their deaths. Earhart is one of those. She's unforgettable for her efforts to make way for women in aviation -- and for her disappearance on July 3, 1937, after she and her navigator took off from Lae, New Guinea, during a record-setting flight around the world. Her Lockheed Electra 10E failed to show up at tiny Howland Island, midway between New Guinea and Hawaii, where they'd planned to land for refueling.

Many are the passionate theories about how and where Earhart and Noonan met their mystery end. I'm one of those people who are sure they know where the wrecked plane, and their remains, can be found.

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A few years ago, after I published an article about Earhart's pioneering in sport aviation for Outsports.com, I was contacted by an Australian search-and-recovery group who had read my piece on the Web. They believed they have the documentary evidence that nobody else has. The evidence: an aluminum tag with some engineering data stamped on it.

Here's how they found that clue. In 1945 in New Guinea, during the closing days of World War II, an Australian platoon returned from a patrol on the island of New Britain. They made a report on an old plane-wreck site that they'd stumbled across in the jungle. The little tag was visible inside one of the mangled engines, and they'd taken it with them. Paperwork on their report was duly shared with Australia's ally, the U.S., who replied that the engine was probably a Pratt & Whitney Wasp, and the aircraft a Lockheed Electra. Later notes were jotted on the patrol map, including the cryptic words "CN 1055."

After a brief flurry of interest, the wreck was evidently forgotten amid the closing throes of war with Japan. After all, the South Pacific was riddled with plane wrecks by then.

Not till the 1990s did one of the four surviving Aussie platoon veterans find himself watching a TV documentary about the ongoing search for Amelia Earhart. The elderly sergeant listened as the film told of the Wasp engines on Earhart's plane, and he suddenly had the hair-raising thought that the mysterious wreck they'd found so long ago might be Earhart's Electra.

Since then, an Australian search-and-recovery organization, the Papua New Guinea Group, has formed around the still-living elderly eyewitnesses. The PNGG is headed by aircraft engineer David Billings of Brisbane. Billings was the one who found my Earhart article on the Web, and emailed to tell me about their work, and his solution of the CN 1055 mystery. CN 1055 turned out to be the construction number for Earhart's plane, meaning it was # 55 to be built by Lockheed in their 10 series. Lockheed would have stamped it on the tag after they made repairs to Earhart's engines in 1937, prior to the commencement of her last flight.

The PNGG have made a series of ongoing expeditions back to New Britain. They've searched the general area methodically, and feel they're closing in on the wreck site, which was half-buried in deep rain forest some miles inland on the northeast end of the island, about 40 miles from the port and airfield at Rabaul.

Other Earhart searchers pooh-pooh the Australian theory. The U.S. government's official story is that Earhart ran out of fuel while searching for Howland Island, and her plane crashed and sank in the deep ocean. One group, TIGHAR, believes that Earhart flew on to the neighboring Phoenix Islands and crash-landed on a small atoll there. Other groups believe that the U.S. sent Earhart to spy on Japanese installations in the Marshall Islands, where she was captured and executed. Millions of dollars have been spent on these searches, but they have found no conclusive evidence. Yet there are always big headlines whenever one of these searches announces their latest effort.

However, when the Wall Street Journal recently featured the Earhart wreck as one of the "seven missing wonders of the world," along with Genghis Khan's tomb and the Ark of the Covenant, the newspaper mentioned growing interest in the PNGG search. After all, it is the only search effort with some real documentary evidence of the wreckage, and where it might be located. After Billings contacted me, I read just about everything ever written about Earhart's disappearance, and I am now associated with the PNGG and share their conviction.

Indeed, there are four July 3 radio messages that support the PNGG's case, that were picked up by radio operators on Nauru, over 1000 miles to the west of Howland. The messages prove that Earhart was still in the air many hours after she supposedly crashed and sank near Howland.

How would Earhart wind up in New Britain, more that 2000 miles west of where she was supposed to land?

Pilots tell me, "You have to think like a pilot to figure out Earhart's story." In 1937, air navigation and radio communications were still in their infancy. The South Pacific was still a vast blue terra incognita that had only a few airfields around its perimeters. Its groups of tiny islands were almost lost in vast expanses of open water. In 1937 the South Pacific had never been overflown. Hence the challenge that Earhart was ready to take.

After the July 2 take-off from Lae, Earhart's radio messages reveal that she and her navigator ran into worsening weather, radio and navigation problems. Early the next morning, as they were supposed to be nearing Howland, they evidently realized they were lost over those vast empty waters. It's a life-and-death rule in aviation, when you get in trouble, that you turn around and head back before you've used half your fuel. So, rather than continuing to search for a pinpoint island out ahead in that vastness, with nothing but empty Pacific beyond, she evidently headed back towards New Guinea, where the map guaranteed that she would run into large land masses. She could hardly miss New Guinea -- the total area is almost as big as Texas. The nearest airfield, at that point, was the one on New Britain, at Rabaul.

David Billings has spent years studying Electra fuel-usage. Earhart's aircraft carried 1150 gallons -- enough to fly well over 4000 miles, according to data from other flights. If Earhart powered down to the slowest possible airspeed, so her engines were burning only 10 gallons an hour each -- a thing she'd done on a previous long flight -- she would ration her fuel well enough to reach New Britain. Tragically, it appears that she ran out of gas just 40 miles from the Rabaul airstrip, and the plane crashed into the rain forest.

Earhart dreamed of a future for women pilots in commercial aviation and peacetime air exploration. It took half a century for her dream to come true. But today the planet is laced with air routes, and many women pilots are out there flying passenger planes, cargo planes, emergency aircraft. Women routinely compete in air racing today. Even the women astronauts are her spiritual daughters. Beyond aviation, Earhart's life has inspired countless women to excel and pioneer in other fields as well.

Meanwhile, the New Britain search goes on. When that wrecked aircraft is found -- and if we think like a pilot -- we can finally get some clarity on the last 24 hours of Earhart's life. It was surely her finest hour as an aviator. She will inspire us all over again with that fierce struggle to save her own life and that of her navigator, as she flew against ever-mounting odds across 2000 miles of unforgiving ocean.

Ironically, Earhart's final, fatal failure is what stamped her successes so vividly and unforgettably into our consciousness of women's history.