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Independent Orbiter Assessment (IOA): Assessment of the elevon actuator subsystem FMEA/CILThe results of the Independent Orbiter Assessment (IOA) of the Failure Modes and Effects Analysis (FMEA) and Critical Items List (CIL) are presented. The IOA effort first completed an analysis of the Elevon Subsystem hardware, generating draft failure modes, and potential critical items. To preserve independence, this analysis was accomplished without reliance upon the results contained within the NASA FMEA/CIL documentation. The IOA results were then compared to the NASA FMEA/CIL baseline with proposed Post 51-L updates included. A resolution of each discrepancy from the comparison is provided through additional analysis as required. This report documents the results of that comparison for the Orbiter Elevon hardware. The IOA product for the Elevon analysis consisted of 25 failure mode worksheets that resulted in 17 potential critical items being identified. Comparison was made to the NASA FMEA/CIL, which consisted of 23 FMEAs and 13 CIL items. This comparison produced agreement on all CIL items. Based on the Pre 51-L baseline, all non-CIL FMEAs were also in agreement.
Document ID
19900001654
Acquisition Source
Legacy CDMS
Document Type
Contractor Report (CR)
Authors
Wilson, R. E. (McDonnell-Douglas Corp. Houston, TX, United States)
Date Acquired
September 6, 2013
Publication Date
February 5, 1988
Subject Category
Space Transportation
Report/Patent Number
REPT-1.0-WP-VA88003-05
NAS 1.26:185578
NASA-CR-185578
Accession Number
90N10970
Funding Number(s)
CONTRACT_GRANT: NAS9-17650
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.

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