 On 11 September 1991, Continental Express Flight 2574, an Embraer EMB 120 Brasilia carrying 14 people, crashed as it was approaching Intercontinental Airport in Houston, Texas, killing all 14 people on board.The National Transportation Safety Board (NTSB) investigation revealed that screws had been removed from the horizontal stabilizer during maintenance the night before the accident and, following a shift change, the screws were not replaced.NTSB cited the failure of airline maintenance and inspection personnel to adhere to proper maintenance and quality assurance procedures.