Failure Analysis of an AH-64 Main Rotor Damper Blade Rod End, P/N 7-211411186-5

Abstract

The U.S. Army Aviation and Missile Command asked the U.S. Army Research Laboratory's Weapons and Materials Research Directorate to determine the probable cause of cracking of an AH-64 main rotor damper blade rod end, part number 7-211411186-5. The component secures an end of one of the linkages on the helicopter's main rotor. The failure was noted while the helicopter was stationed in Seckenheim, Germany, on 10 June 1998. The investigation included visual examination, scanning electron microscopy, energy dispersive spectroscopy, hardness testing, chemical analysis, and retained austenite analysis. The analysis was conducted to evaluate whether the failure was an isolated event or part of an extensive problem in the fleet.

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Document Details

Document Type
Technical Report
Publication Date
Dec 01, 2003
Accession Number
ADA421230

Entities

People

  • Marc S. Pepi
  • Scott M. Grendahl

Organizations

  • United States Army Research Laboratory

Tags

Communities of Interest

  • Air Platforms
  • Energy and Power Technologies
  • Weapons Technologies

DTIC Thesaurus Topics

  • Alloys
  • Chemical Analysis
  • Chemical Synthesis
  • Chemistry
  • Corrosion Resistant Steels
  • Electron Microscopy
  • Failure Analysis
  • Failure Mode And Effect Analysis
  • Hardness
  • Heat Treatment
  • Materials
  • Microscopy
  • Military Research
  • Scanning Electron Microscopy
  • Spectra
  • Spectroscopy
  • Steel

Readers

  • Aviation Science / Aeronautics.
  • Powder metallurgy of Titanium alloys.
  • Technical Research and Report Writing.

Technology Areas

  • Microelectronics
  • Microelectronics - Microelectromechanical Systems