65-04-02\tBOEING: Amdt. 39-34 Part 39 Federal Register February 17, 1965. Applies to Models 707 and 720 Series Aircraft Equipped With an External High Pressure Air Start Connection. \n\n\tCompliance required as indicated. \n\n\tFailures of B-nuts on the high pressure air start system lines have occurred, resulting in whipping lines in the wheel well area. To correct this condition: \n\n\t(a)\tWithin 500 hours' time in service from the effective date of this AD, unless already accomplished, accomplish one of the following or an equivalent approved by the Aircraft Engineering Division, FAA Western Region: \n\n\t\t(1)\tReplace all NAS 596-16 B-nuts on the one-inch high pressure air lines in the 3,000 p.s.i. high pressure air start bottle system with AN 818-16 nuts and MS 20819-16 sleeves in accordance with Boeing Alert Service Bulletin No. 2009 dated May 15, 1964; \n\n\t\t(2)\tRelocate air pressure regulator Boeing P/N 10-3358-1 to a position on the high pressure air start bottle and deactivate the external high pressure air start connection; or \n\n\t\t(3)\tDeactivate the high pressure air start system by removing the high pressure air start bottles and the external high pressure air start lines and connection. \n\n\t(Boeing Alert Service Bulletin No. 2009 dated May 15, 1964, covers this subject.) \n\n\tThis directive effective March 19, 1965.