Military Airlift: Structural Problems Did Not Hamper C-141 Success in Desert Shield/StormNancy R. Kingsbury |
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acceptable According actions actual added additional aerial refueling Air Force Air Force's analysis C-141 aircraft C-141 Airlift Fleet C-141 Fleet Service C-17 Deliveries cargo carry center wing box completed cost Current Airlift Capabilities damage hours delayed designed determine developed effectiveness estimated Extension of C-141 extension program feet Figure fiscal fiscal year 1993 flight flying hours fuel funding further identified impact increase inner/outer wing joint inspections Inspector intervals inventory issued June Lockheed lower main frame Major maximum altitude military missions modification needed normal Number of aircraft officials ongoing Operation Desert Shield/Storm operational restrictions peacetime Performed plans programmed depot maintenance Projected recommendations Reduce Current Airlift reduced remaining repairs replacement restrictions result retire risk safety scheduled service life extension service life hours standard status stress structural problems Systems technical tons transport types Warner Robins weep hole weight wing cracks
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Page 1 - Dear Mr. Chairman: As you requested, this report provides information on the progress and status of management, administrative, and program reforms in five organizations affiliated with the UN system.
Page 39 - C-141 can and should be used in the future to fill airlift needs, should provide an opportunity to review (1) the current technical and funding status of ongoing C-141 repairs, (2) the current technical and funding status of the C-141 service life extension program to 45,000 hours and how that work relates to any further service life extension, and (3) the Air Force's current plans for retiring a portion of the C-141 fleet and how the remaining C-141s will be used and maintained.
Page 33 - ... occur in the late 1990s or the early 2000s. In addition, if the...
Page 8 - T-tail, long-range, heavy lift jet transport. The aircraft is designed to airlift a wide variety of combat units, personnel, and military logistics supplies. The C-5 can carry 340 troops or 36 standard military pallets. It can transport a maximum payload of 121 tons up to 1,650 nautical miles. The C-5 is currently the only airlift aircraft capable of carrying outsized equipment. GAO/NSIAD-93-75...
Page 26 - C-141 main frame (see fig. 3.5) is made of aluminum forgings that are highly susceptible to stress corrosion cracking. The main frame was also identified in the 1977 study as needing improvement or modification in order for the C-141 fleet to reach the 45,000-hour service life. Since fiscal year 1989, approximately 15 aircraft required main frame replacements due to stress corrosion cracking. A depot level program to replace the...
Page 23 - IMI. cracking. Generalized cracking is defined as random, unpredictable, and widespread occurrence of fractures. To correct this condition, the Air Force instituted a depot-level repair program consisting of ( 1 ) removal of all fasteners, (2) nondestructive inspection of all bolt holes, and (3) installation of a fatigue-rated fastener. Figure 3.3: C-141 Inner/Outer Wing Joint Lower...
Page 20 - Military Airlift Extension of C-141 Fleet Service Life changed, and the amount of high-stress missions being flown has increased significantly. Normal peacetime flying now regularly includes high-stress, low-level flying and aerial refueling training missions. An hour of this type of flying may place the equivalent of about 1 .6 hours of stress on specific aircraft structural areas.
Page 2 - As a result, the C-141 fleet will be approaching an average of 45,000 damage hours...
Page 4 - However, in the Conference Report on the National Defense Authorization Bill for Fiscal Year 1993, the conferees agreed to several provisions concerning the C-17 program.
Page 19 - Chapters Extension of C-141 Fleet Service Life Since its introduction in the 1960s, the C-141 has been the backbone of the Air Force's airlift fleet. However, many of the aircraft have already exceeded the originally designed service life of 30,000 hours. The Air Force has identified the actions...