Change 1 (December 2015) A-65 (F)  Shuttle timing (G)  Feed dog, tooth type and feed adjustment (H)  Walking foot feed (I) Stitch length adjustment (J) Thread tension adjustment (K)  Thread tension disk adjustment (L)  Motor type, speed, clutch adjustment and application (M) Double needle applications and stitch width (N)  Setting up machine to run .75 inch nylon binding tape and double and single needle installation (O)  Bar tack machines, stitch patterns and lengths (P)  Free arm machines, operation and uses 3.  Harness geometry and junctions 4.  Harness machine use and operation (7 class) (A)  3 and 4 point harness junction stitch patterns (B) Calculating pattern and stitch numbers to exceed webbing strength (C) Chaffing strip uses and installation in harness junctions (D) Main lift web confluence wrap at 3 ring 5.  Double needle binding tape machine use and operation (A)  Appling binding tape to component edge (B)  Turning 90 degree corner appling tape 6.  304 zig zag stitch machine use and operations (A)  Stitch length adjustment (B)  Stitch width adjustment 7.  Bar tack machine use and operation Stitch width and length adjustment 1.  Webbing joint construction / replace main lift web 2.  Chest strap replacement 3.  Partial top/bottom skin replacement (ram air canopy) 4.  Line set repair or replacement, (round or ram air) 5.  Complete panel replacement (round reserve canopy) 6.  Main parachute riser, major repair or construction 7.  Main parachute deployment bag construction 8.  Installation of AAD in container system not factory ready 9.  Construction of slider ram air canopy 10.  Construct replacement leg pads for container system 11.  Alter riser from l-bar to rapide link 12.  Construct lower steering line assemblies and replacement toggles 13.  Construct 32-inch hand deploy pilotchute 14.  Construct and replace main side flap on container 15.  Replace plastic stiffener and grommet reserve flap assembly 16.  Build and install BOC pocket on container 17.  Construct pull lines and channel for collapsible slider 18.  Construct and replace lower leg straps on articulated harness 19.  Replace parcel rib ram air 20.  Construct collapsible pilotchute bridle assembly H. Master Parachute Rigger Applicant Projects Listed below are possible, projects or tasks you may be required to perform, during the master rigger practical test phase. They may  require only the repair or replacement of a single item, or possible construction and replacement of the entire assembly. All projects are  to be performed to return to service safety and manufacture standards. These are just a few of the possible projects or task you may be required to perform during the practical portion of the master  parachute rigger test. It is important that you learn use of the proper machines, materials, construction methods, obtain the skills, and  knowledge to complete these projects to a return to service standard for safe use.