content_image/569052.jpg content_image/569060.jpg content_image/569061.jpg
11. Check the tension of the new partial panel piece against the edges of the other panels that formed the original seam. They should all be equal. [Figure K] 

<img src='content_image/569052.jpg'>

12. Refold the original seam with the three panel edges and stitch as per the original seam. [Figure L]  Overstitch a minimum of 2 inches on each end. 

<img src='content_image/569060.jpg'>

13. If a line attachment has been removed for the repair, the tab must be replaced. Make sure that the line/tab does not have a twist in it. Locate it at the correct location and reattach as per original. 

## Inspection 

• Check the fabric tension of the replaced panel. It should be equal to that in the remainder of the cell. 

• Spanwise reinforcing tape should be straight and sewn. 

• Seams should be folded correctly and thread tension even along both rows of stitching. 

• Line should be attached correctly and have no twists. 

## Square Canopy—Rib Repair 

• Applicable products: square canopies; main and reserve 

• Description: Rib repair on a square canopy 

• Authorized repairmen: FAA Master Parachute Rigger —mains and reserves; FAA Senior Parachute Rigger—mains 

• Materials: E thread; fabric—type and color to match, reinforcing tape—type and color as per original 

• Machines: 301 dtraight dtitch—medium duty 7–11 SPI, 1 inch × 42 stitch bar tack, double needle with puller attachment (optional) and SPI to match original 

• Equipment: Scissors, seam ripper, marking pencil, ruler, pin board, straight pins, and patching square 

## Procedure 

Repairing a rib of a square canopy is similar to doing a partial panel repair. The biggest difference comes when the rib is either: 

1. A “loaded” rib or one with support tapes for the line attachment points, or 

2. A crossport is damaged and needs to be repaired and recut. In this case, the crossport area needs replacement. [Figure A] 

<img src='content_image/569061.jpg'>

## Disassembly 

1. Determine the extent of the damaged area and unpick the top and bottom seams to access the rib. [Figure B] In most cases, restitching the rib to the top and bottom panels is fairly straightforward. Because of this, opening up the seam for a good distance (18 inches plus either side of the proposed patch) allows easier access and sewing. 

2. Pin the damaged rib to the pin board to stabilize the material for marking. Mark out the damaged portion of the panel, following the weave of the fabric. 

