Printer Friendly

BOEING TO MODIFY 747 ENGINE STRUTS

 SEATTLE, June 18 /PRNewswire/ -- Engine struts on all 747 jetliners will undergo major structural modification, according to a plan Boeing (NYSE: BA) announced today.
 Two additional mountings, made from corrosion-resistant steel, will be installed on all engine struts. These redundant mountings will back up the existing mounting structure, protecting against in-flight separation if any of the attachments fail.
 "During the past nine months, Boeing has asked 747 operators to conduct at least three separate, detailed inspections of the fleet," said Jim Johnson, Boeing vice president responsible for 747 production. "These inspections have ensured the integrity of the 747 fleet. They will continue, and they will be repeated frequently, until this modification effort is completed.
 "These inspections also have provided us with new information about the effects of corrosion and cracking on 747 struts," Johnson added. "Based on what we've learned, we're proposing a comprehensive modification program to address all known problems and ensure that there is a redundant mounting structure on all 747 struts."
 Boeing's plan is subject to approval by the U.S. Federal Aviation Administration. Schedule for modifying all 948 Boeing 747s in service will be developed based on the availability of parts and trained personnel.
 As currently configured, 747 struts attach to the wing in four places. Boeing's plan calls for modifying all struts by installing two additional mountings, which will be bolted to a new attachment fastened to the underside of the wing. In addition, all engine-mounting fuse pins will be replaced with corrosion-resistant pins.
 On earlier 747s (747-100s, -200s, -300s and -SPs), several mounting parts will be replaced with stronger components. Larger midspar fittings, and a stronger diagonal brace and upper link will be installed on these struts. All of these parts are used on 747-400s currently in production.
 It's expected that each airplane will take two to three weeks to modify. Cost of the modification effort will be shared by Boeing and its customers, with Boeing providing all parts and materials.
 When originally developed in the mid-1960s, 747 struts were designed to separate from the airplane. This design -- consistent with safety practices existing at the time -- protected the fuel tanks in the wings from rupturing in the event that an engine struck an object on the ground or in the case of an unforeseen incident in flight.
 "The strut design has been in use for 23 years and more than eight million flights," Johnson said. "But based on recent flight tests, data from the fleet and extensive analysis, we now believe it is prudent to upgrade the structure in all 747 struts. When completed, these upgrades will significantly reduce the frequency of the inspections currently in place."
 The new strut design still protects the fuel tanks during emergencies while preventing in-flight engine separation. After being modified, 747 struts will be similar to those used on all Boeing airplanes currently in production.
 -0- 6/18/93
 /CONTACT: Susan Davis of Boeing Public Relations, 206-342-4771/
 (BA)


CO: The Boeing Co. ST: Washington IN: AIR SU:

SW -- SE002 -- 3418 06/18/93 08:02 EDT
COPYRIGHT 1993 PR Newswire Association LLC
No portion of this article can be reproduced without the express written permission from the copyright holder.
Copyright 1993 Gale, Cengage Learning. All rights reserved.

Article Details
Printer friendly Cite/link Email Feedback
Publication:PR Newswire
Date:Jun 18, 1993
Words:508
Previous Article:YORK INTERNATIONAL ANNOUNCES PLANS TO SHIFT RECIPROCATING CHILLER PRODUCTION
Next Article:IDB COMMUNICATIONS AND TELECOM NEW ZEALAND INTERNATIONAL SIGN AGREEMENT FOR INTERNATIONAL TELEPHONE SERVICE
Topics:


Related Articles
MALAYSIA AIRLINES PLACES $480 MILLION BOEING ORDER
FIRST 747 FLIES AGAIN
BOEING'S FIRST 747 TAPPED AS TESTBED FOR 777 ENGINES
747-400 FREIGHTER ASSEMBLY BEGINS AT BOEING WICHITA
BOEING WICHITA MODIFIES 747 FOR CATHAY PACIFIC
BOEING WICHITA COMPLETES PORTIONS OF FIRST 747-400F
BOEING COMMERCIAL AIRPLANE GROUP SAYS ADDITIONAL 747 INSPECTIONS WILL ENSURE FLEET INTEGRITY
BOEING WICHITA EXPANDS ITS MODIFICATION PRODUCT LINE
Spirit AeroSystems Wins New Business, Will Supply Parts for the Boeing 747-8.
Company Watch - Boeing.

Terms of use | Copyright © 2016 Farlex, Inc. | Feedback | For webmasters