Changes

*Exposure to the elements/unsatisfactory conditions (in some cases [[rust]] can be formed, a known trigger of many failures)

*Exposure to the elements/unsatisfactory conditions (in some cases [[rust]] can be formed, a known trigger of many failures)

*Overuse

*Overuse

*Foreign objects (such as [[bird strike]] in aeroplanes)

*Foreign object damage (such as [[bird strike]] in aeroplanes)