{'fraction_non_alphanumeric': 0.013874066168623266, 'fraction_numerical': 0.013874066168623266, 'mean_word_length': 5.513888888888889, 'pattern_counts': {'":': 0, '<': 0, '<?xml version=': 0, '>': 0, 'https://': 0, 'lorem ipsum': 0, 'www.': 0, 'xml': 0}, 'pii_count': 0, 'substrings_counts': 0, 'word_list_counts': {'cursed_substrings.json': 0, 'profanity_word_list.json': 0, 'sexual_word_list.json': 0, 'zh_pornsignals.json': 0}}
Procedural Error in Maintenance: A Review of Research and Methods

Aviation maintenance procedures have long been of interest to researchers because of their central importance to aviation maintenance and because of problems that seem to resist solution. In this article, we present a review of work that focuses on maintenance procedure incident reports conducted over several years at NASA Ames Research Center. Using 3 different exploratory methodologies, we analyzed relevant reports from a database of 1,046 maintenance reports (from 1998–2002) in the NASA Aviation Safety Reporting System. Analyses revealed that procedural errors in maintenance take a variety of different forms, involve many different types of documents and can be attributed to both document deficiencies and user errors. The objective of these studies was to better characterize procedural errors in maintenance so that more effective solutions can be devised.