Accession Number : AD0767540

Title :   Major Item Special Study (MISS), AH-1G 90 Degree Gearbox.

Descriptive Note : Interim rept. 1 Jan 64-30 Jun 72.

Corporate Author : ARMY AVIATION SYSTEMS COMMAND ST LOUIS MO

Report Date : SEP 1973

Pagination or Media Count : 32

Abstract : The report describes a maintenance analysis of a helicopter rotor gearbox. Major Item Special Study (MISS) reports are performed on DA Form 2410 reportable components. These are time change items and certain condition change items selected because of high cost or need for intensive management. Basically, the MISS reports are concerned with analyzing reported removal data presented in the Major Item Removal Frequency (MIRF) report. The failure modes reported for each removal are examined and grouped into categories which are intended to clarify the intent of the data reporting. From this data, removal distributions can be plotted and an MTR (mean time to removal) can be calculated. The MISS reports then investigate possible cost savings based on total elimination of selected failure modes. These modes are chosen because of the percentage of failures they represent and/or because they appear to be feasible Product Improvement Program (PIP) areas. (Author)

Descriptors :   (*PROPULSION GEARS, *VALUE ENGINEERING), (*HELICOPTER ROTORS, PROPULSION GEARS), LOGISTICS, QUALITY CONTROL, SPARE PARTS, MAINTENANCE, MAINTAINABILITY, COST EFFECTIVENESS, FAILURE, HELICOPTERS

Subject Categories : Helicopters
      Mfg & Industrial Eng & Control of Product Sys

Distribution Statement : APPROVED FOR PUBLIC RELEASE