67-07-03 DOUGLAS: Amdt. 39-356 Part 39 Federal Register March 2, 1967. Applies to Model DC-9 Airplanes Equipped With the Sperry SP-50A Autopilot. \n\n\tCompliance required as indicated unless already accomplished. \n\n\tTo prevent an unsafe condition which may result when the autopilot does not disengage when the control wheel disconnect button is used, accomplish the following: \n\n\t(a)\tFor airplanes having Sperry SP-50A autopilot control panels with 1,500 or more hours' time in service on the effective date of this AD, comply with (d) prior to completing the next 50 hours' time in service. \n\n\t(b)\tFor airplanes having Sperry SP-50A autopilot control panels with less than 1,500 hours' time in service on the effective date of this AD, comply with (d) prior to completing 1,550 hours' total time in service. \n\n\t(c)\tOperators who have not kept records of hours' time in service of individual Sperry SP-50A autopilot control panels shall substitute hours' time in service for the airplane or airplanes in which the individual autopilot control panel was installed. \n\n\t(d)\tInstall a placard in clear view of the pilot with the following information: \n\n\tAutopilot(s) must be turned off when operating below 3,000 feet above ground level in a terminal area. Verify by position of the control panel engage lever. \n\n\t(e)\tThe placard installed in accordance with (d) may be removed when the Sperry SP- 50A autopilot control panel switches have been reworked to Sperry Service Bulletin TA-693-37. \n\n\tThis directive effective March 2, 1967.