Airline Leaks
12th Jun 2011, 12:30
For more than a year Al Jazeera has been investigating allegations - made in US Federal Court proceedings - that between 1996 and 2004 ill-fitting, illegal and dangerous parts were assembled on to many of the most commonly-used passenger planes in the world today.
The allegations concern the Boeing Company - the most respected name in international aviation and the world's second-largest commercial aircraft manufacturer.
The claims were made by then employees of Boeing in Wichita, Kansas who were working on a radically new passenger plane - the 737 Next Generation (NG).
Boeing had produced 737s since the mid-1960s, and the 737 series is the world's most popular short and medium-haul passenger aircraft. It is estimated that, throughout the world, a 737 takes off or lands every five seconds.
But by the mid-1990s Boeing had begun to lose market share to its European rival, Airbus. To regain its pre-eminent position, Boeing decided to build an entirely new version of the 737 - the Next Generation.
Earlier models were built by hand: as a result the dimensions or accuracy of each individual part would often be marginally different, resulting in the need for assembly workers to pack out gaps with "shims" or fillers. These added to the overall weight of an aircraft, making it more expensive to fly.
Parts for the new 737NG plane were to be designed, manufactured and built by a revolutionary new computerised process called ATA. Not only would this ensure that each individual part was identical, but that each would be precise to within 3000ths of an inch.
According to leading aircraft engineer, Dr Michael Dreikorn: "This ATA was designed so that the tolerances on putting the aeroplane together would be so tight that the aircraft would have higher strength and reliability. And in response to that, this aeroplane was certified to have higher gross weight and be able to operate at higher altitudes."
Full Story Here (http://english.aljazeera.net/programmes/peopleandpower/2010/12/20101214104637901849.html)
The allegations concern the Boeing Company - the most respected name in international aviation and the world's second-largest commercial aircraft manufacturer.
The claims were made by then employees of Boeing in Wichita, Kansas who were working on a radically new passenger plane - the 737 Next Generation (NG).
Boeing had produced 737s since the mid-1960s, and the 737 series is the world's most popular short and medium-haul passenger aircraft. It is estimated that, throughout the world, a 737 takes off or lands every five seconds.
But by the mid-1990s Boeing had begun to lose market share to its European rival, Airbus. To regain its pre-eminent position, Boeing decided to build an entirely new version of the 737 - the Next Generation.
Earlier models were built by hand: as a result the dimensions or accuracy of each individual part would often be marginally different, resulting in the need for assembly workers to pack out gaps with "shims" or fillers. These added to the overall weight of an aircraft, making it more expensive to fly.
Parts for the new 737NG plane were to be designed, manufactured and built by a revolutionary new computerised process called ATA. Not only would this ensure that each individual part was identical, but that each would be precise to within 3000ths of an inch.
According to leading aircraft engineer, Dr Michael Dreikorn: "This ATA was designed so that the tolerances on putting the aeroplane together would be so tight that the aircraft would have higher strength and reliability. And in response to that, this aeroplane was certified to have higher gross weight and be able to operate at higher altitudes."
Full Story Here (http://english.aljazeera.net/programmes/peopleandpower/2010/12/20101214104637901849.html)