1、Lessons Learned Entry: 0222Lesson Info:a71 Lesson Number: 0222a71 Lesson Date: 1992-11-18a71 Submitting Organization: KSCa71 Submitted by: David PenningtonSubject: Obsolescent Parts Description of Driving Event: Some of the original equipment manufacturers are not providing sufficient support for ou
2、t-of-production parts. NASA and its contractors have evolved good systems for identifying and tracking these problems, but the difficulties of ensuring continuing production with small batches of obsolescent or semi-obsolescent parts inevitably will increase with orbiter age. The problem involves ba
3、lancing the alternatives of purchasing and storage of excess parts, establishing manufacturing facilities and skills at KSC, or potentially facing critical shortages. The heart of the problem is that many manufacturers simply do not want to devote any more manpower or effort to revive production. Th
4、e study of possible alternative source vendors for critical parts continues but is necessarily a slow and complex process.The 1990 ASAP annual report concerned with structural overhaul and dealt principally with the visit on OV-102 at the Palmdale facility scheduled to begin in June 1991. A review o
5、f the major modifications necessary to bring OV-102 up to the standard of OV-105 was included. During the work on OV-102, a “3-year“ and a “6-year“ structural inspection will be performed. It is assumed that this will provide the information necessary to define a basic structural overhaul program. T
6、his program would then be fitted into available intervals in the launch program up to 1995 for all four orbiters.A second element of longer term maintenance program planning has been defined but apparently is not presently funded. It is known as “orbiter supportability plan - project 2020“ and is in
7、tended to provide a basis for ensuring a rational program for orderly maintenance and support of the fleet through the assembly of the SSF. The outline of the plan properly embraces the interfaces of the existing major contractors and the operating NASA centers, and outlines an organizational suppor
8、t formula. This formula includes detailed line replaceable unit supportability and full structural integrity accountability. The ASAP has an interest in seeing this program go forward as planned.Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-Lesson(
9、s) Learned: Lack of a comprehensive plan for scheduling and accomplishing major overhaul of the orbiter fleet could leave NASA without up-to-date hardware.Recommendation(s): Increased emphasis should be given to ensuring the availability of sufficient quantity of up-to-date hardware.Evidence of Recu
10、rrence Control Effectiveness: N/ADocuments Related to Lesson: N/AMission Directorate(s): a71 Space Operationsa71 Exploration SystemsAdditional Key Phrase(s): a71 Hardwarea71 Launch Vehiclea71 LogisticsAdditional Info: Approval Info: a71 Approval Date: 1994-06-08a71 Approval Name: James G. Klinea71 Approval Organization: KSC/HEIa71 Approval Phone Number: 407-867-7614Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-
