I have a note that says 'On April 10th., 1995, Airbus Industrie apparently issued a statement, which, as reported, said that the 'improper response by the right-hand throttle lever was most probably due to abnormal stiffness of a related mechanical component'. It is understood that 'similar behaviour' first occurred on March 24th., 1992, when the aircraft was being operated by Delta and continued subsequent to that date.'