1、Lessons Learned Entry: 1258Lesson Info:a71 Lesson Number: 1258a71 Lesson Date: 1998-05-29a71 Submitting Organization: JSCa71 Submitted by: Charles J. Backman/ Ronald A. MontagueSubject: Control of Temporary Installations (Wire Harness Fit Check) Description of Driving Event: A wire harness was insta
2、lled on a flight unit for a fit check. Subsequent manufacturing operations were continued through several steps until it was realized that the wire harness was meant to be a temporary installation only. Production time was lost to back out and remove the harness so that it could be returned to its m
3、anufacturer to complete its detail manufacturing sequence and final test. This incident caused a slight impact (delay) to subcontractors internal schedule, but had no effect on overall Program schedule.Root cause: During the Manufacturing process it is very important to flag and control “temporary i
4、nstallations“ to avoid wasting time or, in the worst case, building in sub-assemblies that are incomplete and/or untested.Lesson(s) Learned: Temporary installations often are required as “afterthoughts“ in complex assembly sequences and therefore must be rigorously managed when integrated into assem
5、bly processes.Recommendation(s): Manufacturing procedures have been improved to include very specific identification and technician instructions for handling temporary installations (fit checks of wire harnesses in this individual case). The improved approach includes attachment of a status tag on a
6、ll temporarily installed items. Technicians have been retrained to follow the improved procedures. Evidence of Recurrence Control Effectiveness: Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-N/ADocuments Related to Lesson: N/AMission Directorate(s)
7、: N/AAdditional Key Phrase(s): a71 Configuration Managementa71 Industrial Operationsa71 Packaging Handling Storagea71 Parts Materials & Processesa71 Policy & Planninga71 Safety & Mission AssuranceAdditional Info: Approval Info: a71 Approval Date: 2002-07-15a71 Approval Name: Ronald A. Montaguea71 Approval Organization: JSCa71 Approval Phone Number: 281-483-8576Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-
