0006 00  TM 10-1670-287-23&P  19. Grasp canopy fabric near line 8D attaching loop. Moving to center of canopy pull line 8D and the  control line on the left riser and compare lengths to ensure control line is 15-inches (+ 1-inch) longer  than line 8D.  20. Move to the trailing edge of the canopy. Grasp canopy fabric near both main control line-attaching  loops. Pull control lines and compare to ensure lengths are equal (+ $^{1}$/$_{2}$-inch).  Change 1  0006 00-23  Control Line Control Line  15 ±  1-IN.  Line 8D  Control Line