The objective of this study was to assess the capability of main transmissions, intermediate gearboxes, tail rotor gearboxes, main rotor hubs, and swashplates on the UH-1 and AH-1 to operate with no scheduled overhaul periods. Overhaul and accident records, inspection procedures, and the functional capability of the caution and warning subsystem and its condition-monitoring devices were examined, and failure mode, effects and criticality analyses were performed to determine if any part or assembly failure modes would limit on-condition maintenance capability. This report concludes that UH-1/AH-1 helicopter drive system components have a capability for replacement for overhaul on an on-condition basis and that the overhaul intervals could be extended for some components or eliminated for others. The report includes recommendations for further study.


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    Title :

    Helicopter Drive System on-Condition Maintenance Capability (UH-1/AH-1)


    Contributors:

    Publication date :

    1976


    Size :

    250 pages


    Type of media :

    Report


    Type of material :

    No indication


    Language :

    English





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