Jumbo jet oxygen tank blast would be a first: officialsAn onboard oxygen bottle has never before exploded on a passenger jet in mid-air, airline and air safety officials said Monday, as investigators probed the cause of a huge hole in a Qantas jumbo.
The Australian carrier is carrying out urgent inspections of oxygen bottles on its entire fleet of Boeing 747s after the fuselage of a 747-400 was ripped open, forcing an emergency landing Friday in Manila.
"Boeing advises that no, they have not had one of their aircraft with an oxygen tank disintegrating," Qantas chief engineer David Cox Prominent people named David Cox:
Australian Air Transport Safety Board (ATSB ATSB Australian Transport Safety Bureau
ATSB Air Transportation Stabilization Board (USA)
ATSB Astronautic Technology (M) Sdn Bhd (Malaysia)
ATSB Arbeiter Turn-und Sport-Bund ) investigators are focusing on whether an oxygen bottle used for emergency back-up for the cockpit exploded mid-flight, tearing a three-metre (10-foot) hole in the Boeing's hull.
One of two such cylinders is missing from the plane, which was en route from Hong Kong Hong Kong (hŏng kŏng), Mandarin Xianggang, special administrative region of China, formerly a British crown colony (2005 est. pop. 6,899,000), land area 422 sq mi (1,092 sq km), adjacent to Guangdong prov. to Melbourne and had 365 passengers and crew on board when it was forced to land, investigators said.
But Cox refused to speculate on whether an exploding oxygen bottle was to blame for rupturing the Boeing's hull in an incident that Qantas executives acknowledged ended in a lucky escape for passengers.
"We don't know Don't know (DK, DKed)
"Don't know the trade." A Street expression used whenever one party lacks knowledge of a trade or receives conflicting instructions from the other party. that was the root cause so that's why we're not going to speculate. The fact that that has never happened may be relevant, it may not be relevant," Cox said.
Air safety officials confirmed that if an exploding oxygen bottle is proved to have blown a hole in the jet, it would mark the first time such an incident has been recorded in a large passenger plane.
"As far as we can determine this has never happened before on a passenger aircraft," Civil Aviation Safety Authority The Civil Aviation Safety Authority (CASA) is the Australian federal agency responsible for the regulation of private and commercial flight. It was established on July 6 1995 when the air safety functions of the former Civil Aviation Authority of Australia were separated (CASA Ca´sa
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- Bret Harte. ) spokesman Peter Gibson Peter Hansen Gibson (born April 14, 1971 in Greenwich, Connecticut) is the third of five children: Robert Christian Gibson Jr. (nicknamed, Gibby), Paula Elizabeth Gibson, Jeffrey Michael Gibson & Michael Patrick Gibson. said.
"There's no reports of it anywhere, so it's very, very unusual and obviously understanding why that happened will be absolutely critical to making sure it can't occur again," he told the Australian Broadcasting Corporation The Australian Broadcasting Corporation (ABC) is Australia's national public broadcaster, known previously as the Australian Broadcasting Commission. The ABC provides television, radio and online services throughout metropolitan and regional Australia, as well as .
"If it turns out that is the cause of the accident, the cause of the hole in the side of the aircraft, obviously that will be a key part of the investigation, working out why a bottle would suddenly give way," Gibson said.
Metal fatigue metal fatigue
Weakened condition of metal parts of machines, vehicles, or structures caused by repeated stresses or loadings, ultimately resulting in fracture under a stress much weaker than that necessary to cause fracture in a single application. in the cylinder, a failure of the regulator valve, something hitting it and puncturing the bottle, or it overheating Overheating
An economy that is growing very quickly, with the risk of high inflation. , were among possible causes the ATSB would look at, he said.
"Maintenance has to be looked at obviously, yes you can't rule that out, but at this stage you look at absolutely everything," Gibson told ABC radio.
Qantas has ordered checks on the oxygen bottles -- they are due to be completed this week -- after Australian investigators leading the probe in the Philippines revealed a cylinder was missing from the plane.
But outgoing Qantas Chief Executive Geoff Dixon defended the airline's "enviable" safety record and dismissed speculation that the stricken aircraft may have been improperly maintained.
"We have very strict maintenance and security in this company, I think we have a worldwide reputation for it," Dixon told a press conference in Sydney.
Some passengers have alleged that the oxygen masks that dropped from the ceiling when the plane began its emergency descent following depressurisation did not work and one claimed the elastic headband on his mask had deteriorated.
"There is no doubt that all of our masks are checked on a regular basis, yet there is every chance that the trauma suffered by the aircraft may have interfered with other systems," Dixon said.
"We believe that everything in that aircraft was in good shape when it took off," he said.