80-17-12 MCDONNELL DOUGLAS: Amendment 39-3890. Applies to DC-10 Series Airplanes fuselage numbers 1 through 243. \n\n\tCompliance required as indicated, unless already accomplished. To prevent restriction of travel of the wing engine emergency fire shut off handle and loss of associated fire fighting safeguards, accomplish the following: \n\n\tWithin 300 hours additional time in service after the effective date of this AD, accomplish paragraph (1) or (2) below. \n\n\t(1)\tInspect and seal cable guard pin P/N AA 2603-9 in place in accordance with McDonnell Douglas Alert Service Bulletin A76-27 dated 6/24/80 and within 1500 hours additional time in service after the effective date of this AD accomplish the modification described in McDonnell Douglas Service Bulletin 76-27 dated 7/16/80; or \n\n\t(2)\tAccomplish the modification described in McDonnell Douglas Service Bulletin 76-27 dated 7/16/80. \n\n\t(3)\tAccomplishment of the modification described in McDonnell Douglas Service Bulletin 76-27 dated 7/16/80 is terminating action for this AD. Service Bulletin 76-27 calls for the replacement of the existing guard pin with a new guard pin incorporating a lip retaining head. \n\n\t(4)\tSpecial flight permits may be issued in accordance with FAR 21.197 and 21.199 to operate airplanes to a base for the accomplishment of modification required by this AD. \n\n\t(5)\tAlternative inspections, modifications or other actions which provide an equivalent level of safety may be used when approved by the Chief, Aircraft Engineering Division, FAA Western Region. \n\n\tThis amendment becomes effective August 28, 1980.