10 ungelöste Flugzeuggeheimnisse

Als dieser Artikel fertiggestellt wurde, sahen sich Suchende damit konfrontiert, ein Gebiet von mehr als 22.000 Quadratmeilen (57.000 Quadratkilometer) im Indischen Ozean zu durchsuchen. Das Flugzeug zu finden, scheint ein langer Weg zu sein, geschweige denn das Rätsel zu lösen, warum es überhaupt verschwunden ist [Quelle: Associated Press ].

Es ist schwer vorstellbar, dass heutzutage bei all der Technologie, die uns zur Verfügung steht, ein Flugzeug verloren gehen kann. Über Land können Fluglotsen beispielsweise zwei verschiedene Arten von Radar verwenden, um Flugzeuge zu verfolgen.

Wenn sich ein Flugzeug über dem Ozean außerhalb der Reichweite des Bodenradars befindet, verwendet es ein weiteres System , die automatische abhängige Überwachung , die ein Signal an Satelliten sendet, um die Position anzuzeigen. Flugzeuge sind auch so konstruiert, dass sie das Flugzeugkommunikationsadressierungs- und -meldesystem benachrichtigen, wenn sie mechanische Fehler entwickeln. Die Ermittler glauben, dass im Fall von MH 370 diese Systeme abgeschaltet wurden, möglicherweise absichtlich von Saboteuren [Quelle: Topham ].

Aber obwohl der Fall Malaysia Airlines zutiefst rätselhaft ist, ist er alles andere als beispiellos. Seit 1948 sind mehr als 100 andere Flugzeuge in der Luft verschwunden und wurden nie gefunden, laut Aufzeichnungen des Aviation Safety Network, einer internationalen Organisation, die Flugzeugunfälle, Entführungen und Sicherheitsprobleme verfolgt [Quellen: Topham , ASN ]. Wieder andere Flugzeuge sind unter Umständen abgestürzt, die noch nicht vollständig geklärt sind. Hier ist ein Blick auf 10 der rätselhaftesten Luftfahrtgeheimnisse aller Zeiten.

1. Amelia Earhart verschwindet
2. Was bedeutet STENDEC?
3. War es ein außerirdisches Raumschiff?
4. Die fehlende H-Bombe
5. Die Opfer des Vietnamkriegs, die nie nach Vietnam kamen
6. Ein künstlerisches Verschwinden
7. Mechanisches Versagen oder Selbstmord?
8. Das gestohlene Flugzeug
9. Das Geisterflugzeug
10. War ein verschlafener Pilot schuld?

Im Juni 1937 machte sich die berühmte Fliegerin Amelia Earhart auf, um als erste Frau die Welt zu umrunden, eine Reise von 29.000 Meilen (46.671 Kilometer). Bis auf die letzten 11.265 Kilometer hatte sie alle bis auf die letzten 7.000 Meilen (11.265 Kilometer) zurückgelegt, als sie und ihr Navigator Fred Noonan von Lae in Papua, Neuguinea, zu einem 4.114 Kilometer (2.556 Meilen) langen Flug nach Howland Island abhoben. eine kleine Insel im Pazifik.

Ein Kutter der US-Küstenwache, die Itasca, war direkt vor der Küste stationiert, und zwei weitere Schiffe wurden entlang der Flugroute als Markierungen für Earharts Flugzeug positioniert. Trotzdem geriet das Flugzeug in einen bewölkten Himmel und zeitweilige Regenschauer, die die Himmelsnavigation, Noonans bevorzugte Methode, erschwerten. Am nächsten Morgen um 7:42 Uhr empfing die Itasca diese Funkübertragung von Earhart: "Wir müssen bei Ihnen sein, aber wir können Sie nicht sehen. Der Treibstoff geht zur Neige." Etwa eine Stunde später funkte Earhart: „Wir rennen nach Norden und Süden“ [Quelle: AmeliaEarhart.com ].

Das war ihre letzte Übertragung, und ihr Flugzeug kam nie an. Retter führten die damals umfangreichste Suche in der Geschichte der Luftfahrt durch und durchsuchten 250.000 Quadratmeilen (647.497 Quadratkilometer) Ozean in einem erfolglosen Versuch, sie zu finden. Einige glauben, dass das Flugzeug im Meer abgestürzt ist und die Passagiere getötet wurden; andere, dass sie den Absturz überlebten , aber auf einer abgelegenen Insel verdursteten, oder dass sie von den Japanern, die obwohl sie Spione waren, lebend als Geiseln genommen wurden [Quelle: Roach and Than ]. Bis heute bleibt das Schicksal von Earhart und Noonan ein Rätsel.

In August 1947, a British airliner containing 11 people took off from Buenos Aires on a flight to Santiago, Chile, and vanished, apparently just a few minutes before landing. The only clue it left was a puzzling Morse code message, "STENDEC," which was the final transmission from the plane. The word was transmitted three times.

Fifty-three years later in 2000, an expedition of searchers finally found the missing plane, which had crashed into a mountain about 31 miles (50 kilometers) from its destination. A glacier had entombed it in ice. Examination of the engines showed no mechanical failure, but accident investigators hit upon another possible explanation. They decided that the plane probably had flown high to avoid bad weather and run into a jet stream , a high-speed wind whose existence had not yet been discovered. That wind would have slowed down the aircraft, so that when it started descending it was not as close to the airport as the pilot thought and so headed toward the mountain. But even so, nobody has ever figured out the meaning of the last message sent by the plane, which for years has defied myriad efforts to decipher it [sources: BBC News, BBC News].

In January 1948, Capt. Thomas Mantell, a Kentucky Air National Guard pilot, and some other pilots took off in P-51 Mustang fighters from the airfield at Fort Knox, pursuing a rapidly moving, westbound, circular object. The other pilots called off the chase when the large, metallic object elevated to 22,500 feet (6,858 meters) in altitude, and they returned safely. (The danger zone for flying without oxygen begins at 14,000 feet, or 4,267 meters.) But Mantell kept following this strange aircraft. His plane tumbled from the sky and crashed in Kentucky.

The official explanation was that he lost consciousness from a lack of oxygen , but questions remain about why he kept going and what he was following so intently. Air Force officials initially said Mantell had mistakenly followed planet Venus, but some witnesses thought he had seen a spaceship or some other UFO . The object is now believed to be a Skyhook weather balloon used to measure radiation levels that was part of a secret project [sources: National Guard History eMuseum, Randle].

During a routine training mission off the coast of Georgia in February 1958, a B-47 bomber accidentally collided with an F-86 fighter jet whose pilot didn't see the bomber on his radar. The crash tore the left wing off the fighter and severely damaged the bomber's fuel tanks. The bomber pilot, Air Force Col. Howard Richardson, was confronted with an agonizing dilemma. His aircraft happened to be carrying a 7,000-pound (3,175-kilogram) H-bomb , and Richardson was worried that the bomb would break loose from his damaged plane when he tried to land.

To avoid that situation, he went with his only other option, and dumped the bomb into the waters off Tybee Island, Ga., before landing at Hunter Air Force Base outside Savannah. The Navy searched for the lost bomb for more than two months, without success, and for decades, its location has remained a mystery. The Air Force says the bomb presents little hazard if left undisturbed [source: NPR].

These lost men have never had their names added to the Vietnam Veterans Memorial in Washington. Even more oddly, no government agency — not the Army, Air Force, Pentagon, State Department, National Archives or CIA — admits to possessing any records about the mission. Yet in March 1962, Flying Tiger Line Flight 739, containing 93 U.S. military advisers, three South Vietnamese officers and 11 crew members, vanished between Guam and the Philippines on the way to Vietnam. No wreckage was ever found, though some witnesses reported seeing a vapor trail and explosion in the sky on the night it disappeared [source: Burke].

Some speculate that the aircraft was downed by Viet Cong sabotage, which would make the passengers among the first casualties of the Vietnam War . Others believe it was brought down by friendly fire. Eerily, at least three soldiers told their family members they had a premonition that they would not return from this mission alive [source: Burke].

A Boeing 707 cargo plane containing 153 paintings by famed Brazilian-Japanese painter Manabu Mabe worth about $1.2 million, took off from Narita International Airport in Tokyo in January 1979. The plane, operated by Varig Airlines, was scheduled to stop in Los Angeles and continue on to Rio de Janeiro.

But it never got there. Instead, when the plane was north of Tokyo, about 30 minutes after takeoff, air traffic controllers lost contact with the pilot . No trace of the plane, the cargo or its six-person crew has ever been found [sources: ASN, Hastings].

This one sparked an international controversy. On Oct. 30, 1999, EgyptAir Flight 990 took off from Kennedy Airport in New York bound for Cairo with 217 people aboard. A senior pilot named Ahmad al-Habashi was in command of the Boeing 767 jetliner, and a veteran co-pilot, Gameel al-Batouti, was assisting him.

The plane climbed to 33,000 feet (10 kilometers) and flew normally for 30 minutes, before plummeting into the Atlantic Ocean 60 miles (97 kilometers) south of Nantucket, Mass., killing everyone aboard [source: Langewiesche].

So what caused the accident? Egyptian officials believed that mechanical failure was to blame, stating that suicide is against Islam. But the U.S. National Transportation Safety Board (NTSB) concluded that the co-pilot had deliberately caused the crash, citing that the autopilot was off, the plane was in a wings-level dive and the co-pilot muttered calmly to himself, "I rely on God" many times. The final report said that the crash was due to the co-pilot's "manipulation of the airplane controls," a claim Egypt still disputes [source: Wald].

However, one EgyptAir pilot told the FBI that Batouti had just been demoted because of accusations of sexual misconduct, and might have crashed the plane to commit suicide or to take revenge against his supervisor, who was a passenger on the flight [source: Wald].

In May 2003, a Boeing 727 owned by a Florida-based leasing company, was undergoing repairs at an airport in Luanda, Angola. Suddenly, it rolled onto a runway without getting permission from the tower and took off to the southwest in an erratic fashion, with lights off and no transponder signaling.

On board were Ben Charles Padilla, an experienced mechanic and flight engineer who was supervising the repairs, and his recently hired Congolese assistant, John Mikel Mutantu. Neither was trained to fly a 727 – Padilla had only a private pilot's license , and Mutantu had nothing. But both men and the plane disappeared and were never seen again.

Authorities initially suspected that terrorists might be responsible, or else it was an insurance scam. Now they seem to lean toward some sort of hijacking for profit [source: Wright].

This was one of the most horrifying incidents in aviation history. In August 2005, Helio Airways Flight 522 was on a short trip from Cyprus to Greece, when it veered slightly off course. Nineteen radio requests were sent for an explanation but there was no response.

Finally, two F-16s caught up with the plane to see what was going on, and their pilots saw that the captain's chair was empty and the co-pilot appeared to be unconscious, with his oxygen mask dangling from the ceiling. All the passengers were frozen to their seats, at temperatures of minus 58 F (minus 50 C).

The fighters followed the "ghost plane" as it flew on autopilot until it ran out of fuel and crashed into a hillside. The official report by Greek authorities concluded that the pilots had somehow incompetently left the plane's pressurization system in manual mode after takeoff, so the plane didn't automatically repressurize when cabin pressure was lost. Further, the pilots failed to recognize the warning signs that the cabin was losing pressure -- and oxygen -- until it was too late. But that explanation fails to satisfy those who suspect that the aircraft was haunted [sources: Daily Mail, Krisch].

In an accident reminiscent of Malaysia Airlines Flight 370, Air France Flight 447 disappeared over a stretch of the ocean where there was no radar coverage. In June 2009, this Airbus A330-200 airliner carrying 216 passengers and 12 crew members disappeared over the Atlantic en route from Rio de Janeiro to Paris.

For several days, no one knew what had happened. But even after wreckage was spotted and recovered, the circumstances remained murky. The state-of-the-art jet was equipped with the latest tracking and communication equipment, yet it hadn't emitted a distress signal at any point. Two years later, the plane's black boxes were finally recovered from the ocean [source: Smith].

French air safety investigators concluded in a 2012 report that the tragedy likely had been caused by an odd cascade of errors. Ice crystals accumulated on a probe, causing it to give incorrect speed readings and the autopilot system to disengage. The aircraft's two co-pilots, who were in charge at the time because the captain was taking a break, apparently became confused by the malfunction. By the time the captain rejoined them 90 seconds later, the airplane already was in a stall that he could not avert. The plane crashed two minutes and thirty seconds later [source: BEA].

Why it took the captain so long to respond to the co-pilots' frantic calls for help has never been explained. News media reported that the captain was accompanied on the flight by a female companion, and that he'd only slept one hour the night before [sources: Battiste, Smith].

Author's Note: 10 Unsolved Airplane Mysteries

I've long been fascinated with the Amelia Earhart case, ever since I read a book as a boy that argued that she had been captured by the Japanese and possibly executed as a spy. I was surprised to discover, however, that so many aircraft had disappeared over the decades.

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