The report documents the results of a national survey of book publishing firms and aviation maintenance technician schools to (1) identify the text materials used in the training of aviation mechanics; (2) appraise the suitability and availability of identified text materials; and (3) determine the adequacy of the text materials in meeting the curricula requirements of FAR Part 147. The study surveyed 239 book publishing firms and 105 aviation maintenance technician schools. There were 4,349 students who participated in the reading experiment and 103 instructors who administered the reading experiment in 41 aviation maintenance technician schools. Both students and instructors evaluated the text materials used in the reading experimental study. Results of the study provided the following: (1) determination of the availability of commercially published text materials, (2) determination of price ranges for the available text materials, (3) determination of technical accuracy of the available text materials, (4) determination of the subject content quality in the text materials from the standpoint of learning effectiveness, and (5) determination of the subject coverage and relevance of text materials to FAR Part 147 curricula requirements. (NTIS)