The ability of federal safety regulators to oversee airplane maintenance at United Airlines has been hindered by inadequate staffing, high employee turnover and the improper use of virtual inspections instead of on-site reviews in some cases, according to a government watchdog audit released Friday.

Wild video shows a United Airlines flight suffering a "mechanical issue" at a Florida airport -- appearing to teeter forward on the runway as a part of the aircraft spun off, according to authorities and reports.