Accession Number:

ADA196002

Title:

NDE (Nondestructive Evaluation) of Black Hawk Helicopter Rotary Wing-Head Spindle Threads Using Electric Current Perturbation

Descriptive Note:

Final rept. 24 May-12 Nov 1985

Corporate Author:

SOUTHWEST RESEARCH INST SAN ANTONIO TX

Personal Author(s):

Report Date:

1985-11-12

Pagination or Media Count:

34.0

Abstract:

Six Black Hawk helicopter rotary wing-head spindles were inspected for flaws in the thread roots using the electric current perturbation ECP method. Both new spindles and spindles which had been removed from service were examined. The ECP method was shown to provide much higher sensitivity for detection of surface and slightly subsurface flaws than the presently-used ultrasonic method. In addition, ECP is not influenced by the presence of a tie rod in the spindle bore. A laboratory demonstration of the flaw detection capability of ECP was held for representatives of USAAVSCOM and Sikorsky Aircraft.

Subject Categories:

  • Helicopters

Distribution Statement:

APPROVED FOR PUBLIC RELEASE