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BOEING COMMERCIAL AIRPLANE GROUP SAYS ADDITIONAL 747 INSPECTIONS WILL ENSURE FLEET INTEGRITY

 BOEING COMMERCIAL AIRPLANE GROUP SAYS ADDITIONAL 747 INSPECTIONS
 WILL ENSURE FLEET INTEGRITY
 EVERETT, Wash., Nov. 12 /PRNewswire/ -- Boeing announced today it will ask airline customers next week to conduct additional inspections of 747 engine struts.
 "These expanded inspections are a way to ensure the continued integrity of the fleet," said Jim Johnson, vice president and general manager of Boeing's Everett Division, which produces 747s.
 "A month ago, we asked operators to conduct limited inspections of 747s," he added. "We've reviewed the results of those initial inspections with our customers and the Federal Aviation Administration, and decided that additional inspections should be conducted as a precautionary measure."
 Initially, airlines were asked to check for cracks and corrosion in the fuse pins that attach engine struts to the wings of 747s.
 "During the first round of inspections, we found very few cases of cracked fuse pins. All those pins have been replaced," Johnson said. "However, on approximately 20 percent of the pins inspected, we found enough corrosion to warrant their replacement.
 "Since corrosion eventually can lead to cracking, we think it's prudent to take a closer look at the fleet," Johnson added. "This will prevent cracks before they occur and ensure the continued integrity of the 747 fleet."
 Boeing is preparing a service bulletin that will instruct airlines to do the following:
 -- Within 30 days, conduct visual and ultra-sonic inspections of the other side of those fuse pins that already have been inspected. Previously, customers were asked to inspect only one side of selected pins that have been in service for more than 5,000 landings.
 -- Within 60 days, conduct visual and ultra-sonic inspections of inboard-strut midspar fuse pins that have accumulated 3,000 landings or have been in service for more than three years.
 -- Within 90 days, conduct visual and ultra-sonic inspections of outboard-strut midspar fuse pins that have accumulated 3,000 landings or have been in service for more than three years.
 -- Conduct ultra-sonic inspections of the midspar fittings, which along with the fuse pins, are used to connect engine struts to the wings.
 -- Replace all old-style fuse pins with new pins. Old-style pins were produced up until 1980, however, the vast majority already have been removed from the fleet.
 Boeing's new recommendations, which will affect more than 700 airplanes, will apply to 747s powered by General Electric, Pratt & Whitney and Rolls-Royce engines.
 Besides calling for additional inspections, Boeing also is conducting test flights to obtain more detailed information about the forces applied to engine struts during every phase of flight. That data, combined with information gathered during the next round of inspections, will be used to determine what additional actions may be necessary, Johnson noted.
 -0- 11/12/92


/CONTACT: Chris Villiers, 206-342-4772, or Susan Davis, 206-342-8600, both of Boeing Commercial Airplane Group/
 (BA) CO: Boeing Commercial Airplane Group ST: Washington IN: AIR SU:


JH -- SE008 -- 0443 11/12/92 18:02 EST
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Publication:PR Newswire
Date:Nov 12, 1992
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