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

Abstract

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.

Open PDF

Document Details

Document Type
Technical Report
Publication Date
Jul 01, 1976
Accession Number
ADA028032

Entities

People

  • G. E. Knudsen
  • J. R. Keating

Organizations

  • Bell Flight

Tags

Communities of Interest

  • Air Platforms
  • Ground and Sea Platforms

DTIC Thesaurus Topics

  • Aircraft Equipment
  • Aircrafts
  • Bearings
  • Bypass Valves
  • Couplings
  • Failure Mode And Effect Analysis
  • Filters
  • Fittings
  • Gears
  • Maintenance Management
  • Maintenance Personnel
  • Oil Filters
  • Seals
  • Splines
  • Three Dimensional
  • Valves
  • Warning Systems

Readers

  • Aerospace Engineering
  • Aviation Safety Risk Assessment.