The report, the first of two documents examining the relationship among job requirements, training, and manpower considerations for Army aviation maintenance Personnel, discusses the development of task data gathering techniques and procedures for incorporating this data into training programs for the UH-1 helicopter mechanic sPecialty (MOS 67N20). Seven questionnaire job description inventories regarding helicopter mechanic personnel job activities were developed and administered worldwide to over 5,000 UH-1 mechanics, crew chiefs, maintenance supervisors, and maintenance officers during FY 1968-69. A broad profile of UH-1 maintenance personnel, including background and training, and a description of the UH-1 mechanic's general job activities are presented. Seven conclusions are stated and tables supplement the discussion. Appended material makes up the bulk of the document and includes field survey responses, evaluation of school instruction in UH-1 maintenance, responses of nonperforming helicopter maintenance personnel, development of UPGRADE job description inventories, selection of UH-1 maintenance personnel surveyed during the UPGRADE field survey, units surveyed by on-site survey procedure. (LH)