What is the fine-grained topic of the following text: On 20 March 2017, during a pre-dawn take off for a single pilot positioning flight from Boise Air Terminal/Gowen Field (BOI), Idaho, Western Airlines Swearingen SA226TC Metro II N158WA suffered substantial foreign object damage due to a forgotten tool. Only return the topic.
Airplane damage due to a forgotten tool during a 2017 Western Airlines flight.