71-02-04 BOEING: Amdt. 39-1146. Applies to all Boeing Model 747 Series airplanes. \n\tCompliance required within the next 300 hours' time in service after the effective date of this AD, unless already accomplished. \n\n\tTo prevent the failure of the load evener indicator tube resulting in passenger injury: \n\tReplace the existing body gear indicator tube cover with a new tube cover in accordance with Boeing Service Bulletin 32-2031, dated July 24, 1970, or later FAA approved revision, or an equivalent modification approved by the Chief, Aircraft Engineering Division, FAA Western Region. \n\tThis amendment becomes effective January 23, 1971.