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Independent Orbiter Assessment (IOA): Assessment of the Rudder/Speed Brake Subsystem FMEA/CIL (Failure Modes and Effects Analysis/Critical Items List).

N9010975

Publication Date	1988
Personal Author	Wilson, R. E.
Page Count	99
Abstract	The 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 Rudder/Speed Brake (RSB) 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 along with the proposed Post 51-L CIL updates included. A resolution of each discrepancy from the comparison was provided through additional analysis as required. This report documents the results of that comparison for the Orbiter RSB hardware. The IOA product for the RSB analysis consisted of 38 failure mode worksheets that resulted in 27 potential critical items being identified. Comparison was made to the NASA baseline which consisted of 34 FMEAs and 18 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.
Keywords	Aerial rudders Brakes (For arresting motion) Space shuttle orbiters Spacecraft reliability Failure modes Spacecraft control Actuators Aerospace safety Component reliability Flight control Shafts (Machine elements)
Source Agency	National Aeronautics and Space Administration
NTIS Subject Category	84C - Manned Spacecraft
Corporate Authors	McDonnell Douglas Astronautics Co., Houston, TX.; National Aeronautics and Space Administration, Washington, DC.
Document Type	Technical Report
NTIS Issue Number	199005
Contract Number	NAS9-17650

Independent Orbiter Assessment (IOA): Assessment of the Rudder/Speed Brake Subsystem FMEA/CIL (Failure Modes and Effects Analysis/Critical Items List).

Independent Orbiter Assessment (IOA): Assessment of the Rudder/Speed Brake Subsystem FMEA/CIL (Failure Modes and Effects Analysis/Critical Items List).
N9010975

Publication Date	1988
Personal Author	Wilson, R. E.
Page Count	99
Abstract	The 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 Rudder/Speed Brake (RSB) 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 along with the proposed Post 51-L CIL updates included. A resolution of each discrepancy from the comparison was provided through additional analysis as required. This report documents the results of that comparison for the Orbiter RSB hardware. The IOA product for the RSB analysis consisted of 38 failure mode worksheets that resulted in 27 potential critical items being identified. Comparison was made to the NASA baseline which consisted of 34 FMEAs and 18 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.
Keywords	Aerial rudders Brakes (For arresting motion) Space shuttle orbiters Spacecraft reliability Failure modes Spacecraft control Actuators Aerospace safety Component reliability Flight control Shafts (Machine elements)
Source Agency	National Aeronautics and Space Administration
NTIS Subject Category	84C - Manned Spacecraft
Corporate Authors	McDonnell Douglas Astronautics Co., Houston, TX.; National Aeronautics and Space Administration, Washington, DC.
Document Type	Technical Report
NTIS Issue Number	199005
Contract Number	NAS9-17650