Accession Number : AD0741377

Title :   Helicopter Development Reliability Test Requirements. Volume II. Study Parameters Interrelationship

Descriptive Note : Final rept.

Corporate Author : BOEING VERTOL CO PHILADELPHIA PA

Personal Author(s) : Aronson, R B

PDF Url : AD0741377

Report Date : Feb 1972

Pagination or Media Count : 28

Abstract : Two of the key activities in programs to develop higher levels of helicopter equipment reliability are test activities: reliability problem- identification testing and reliability demonstration testing. This document introduces the variables that must be dealt with in testing: demonstrated mean time between failures (MTBF), desired level of confidence, demonstration duration, and probability of passing. It also explains their relationships and the testing strategy which derives from the fact that helicopter hardware must have a real MTBF greater than demonstrated MTBF in order to have a resonable probability of passing a prescribed demonstration.

Descriptors :   *ARMY EQUIPMENT, *HELICOPTERS, *TEST METHODS, AIRCRAFT EQUIPMENT, CONFIDENCE LIMITS, COST EFFECTIVENESS, COSTS, FAILURE(MECHANICS), MAINTENANCE, MANAGEMENT PLANNING AND CONTROL, MATHEMATICAL MODELS, PROBABILITY, RELIABILITY, TEST EQUIPMENT

Subject Categories : Helicopters
      Economics and Cost Analysis
      Test Facilities, Equipment and Methods

Distribution Statement : APPROVED FOR PUBLIC RELEASE