Family problems, financial difficulties, bad interpersonal relations, company conflicts and pressure from your employers are all major stresses that can provoke fatigue. Be aware of these stress factors and keep them in perspective. Fatigue can affect our coordination and judgment in many ways that degrade the quality of our work. Classic case studies of maintenance errors due to fatigue include the Chernobyl and Three Mile Island nuclear plant disasters, the Boeing 737 forward fuselage section separation attributed to undetected corrosion and the BAC 111 windshield which blew out because of the wrong size fasteners.