Following the Qantas announcement, a Boeing spokesperson on Thursday told AFP in Sydney that less than five percent of 1,000 planes had cracks detected and were grounded for repair. The spokesperson did not give an exact figure, though five percent equates to 50 planes of 1,000 inspected.
Boeing and Qantas stressed travellers should not be concerned. "We would never operate an aircraft unless it was completely safe to do so," Qantas head of engineering Chris Snook said. But the discovery has heightened fears that the scale of the 737NGs' problem may have been underestimated.
The US Federal Aviation Administration had initially ordered immediate checks of Boeing 737NG planes that had flown more than 30,000 times. But Qantas said it had found the fault in a more lightly used aircraft than those singled out for early checks; one that had recorded fewer than 27,000 flights. "This aircraft has been removed from service for repair," Qantas said in a statement, adding it had hastened its inspections of 32 other 737NG planes to be completed by Friday. The airline said it generally used the aircraft on domestic routes, flying primarily between major cities as well as shorter-haul trips to New Zealand.
A spokesman for Australia's aviation regulator said the industry response was about "nipping a potential safety problem in the bud by taking proactive action now". Australia's Virgin Airways also conducted checks on its 17 Boeing 737NG planes and did not find any issues, the regulator spokesman added.
In Europe, Ireland's Ryanair, which operates more than 450 Boeing aircraft, said in a statement that "Ryanair is continuing to review its aircraft in line with the AD (Airworthiness Directive) and does not expect it to have any impact upon our operations or fleet availability".