FAA AMT Handbook

The FAA AMT Handbook is the handbook for aviation maintenance technicians that has been developed and distributed by the Federal Aviation Administration (FAA). Its Chapter 14 is called Human Factors and contains the following introduction:

Why are human conditions, such as fatigue, complacency, and stress, so important in aviation maintenance? These conditions, along with many others, are called human factors. Human factors directly cause or contribute to many aviation accidents. It is universally agreed that 80 percent of maintenance errors involve human factors. If they are not detected, they can cause events, worker injuries, wasted time, and even accidents.