NEW : TO : ` ` We 're not clear '' on what caused the hole . A pilot discovered a small hole in the side of the aircraft . An FBI report indicates the hole is bullet - sized , but not necessarily from a bullet . The airline pulled the plane from service and called in the FBI . The plane flew from Philadelphia and landed at Charlotte without incident .
NEW : TO : ` ` We 're not clear '' on what caused the hole . A pilot discovered a small hole in the side of the aircraft . An FBI report indicates the hole is bullet - sized , but not necessarily from a bullet . The plane flew from Philadelphia and landed at Charlotte without incident .