Accession Number : AD0739568

Title :   CH-47A, B and C Series Helicopter Rotor Blade Failure and Scrap Rate Data Analysis

Descriptive Note : Final rept.

Corporate Author : BOEING VERTOL CO PHILADELPHIA PA

Personal Author(s) : Hunt, R L

PDF Url : AD0739568

Report Date : Nov 1971

Pagination or Media Count : 121

Abstract : The report provides the results of an analysis of failure data derived from depot inspection, overhaul/rework, and scrappage reports on 5,488 rotor blades of the CH-47 series tandem rotor helicopters. Two types of rotor blades were analyzed for blade mean-time-between-removals, mean-time-to- removals, mean-time-between-unscheduled-removals and mean-time-between- scrappage. Locations on these blades for the major discrepancies were determined. Blade teardown experience was determined. A cost comparison of blade acquisition costs versus the average cost of repair/rework was provided.

Descriptors :   *MAINTENANCE, *ROTOR BLADES(ROTARY WINGS), FAILURE(MECHANICS), HELICOPTERS, MAINTAINABILITY, STATISTICAL ANALYSIS

Subject Categories : Helicopters

Distribution Statement : APPROVED FOR PUBLIC RELEASE