April 15 (Reuters) - The Federal Aviation Administration (FAA) has ordered an inspection of more than 1,000 U.S.-registered Boeing 737 jets to examine the tail planes for a potentially faulty part, which it said could cause pilots to lose control of the aircraft if it failed. The airworthiness directive (AD) issued by the FAA calls on airlines and other operators to replace tail plane fixing pins with improved pins following concerns over how their protective surface coating was applied.