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I, and numerous others have been saying this for a long time: poor or incomplete documentation can cost you a lot of money. According to this article, the United States Air Force discovered this the hard way. A mishap with a landing gear pin cost $6.75 million (U.S.). This paragraph from the article is telling:

Investigators concluded that, while Air Force guides correctly instructed Raptor mechanics to install the landing gear pins before performing maintenance on the airplanes, there were no similar step-by-step instructions to ensure mechanics remember to take the pins out prior to clearing the aircraft for use.