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Flashcards in Aircraft Covering Deck (25):

How would you determine the strength requirements for fabric used to re-cover an aircraft

Must be of at least the quality and strength of the fabric used by the original manufacturer


What two types of organic fibers are used for covering aircraft

Cotton and linen


What is meant by warp, weft, and bias

Warp is the direction along the length of the fabric,
Weft is the direction across the fabric at right angles to the warp, and bias is a direction at 45 degree angle to warp and weft


What is the purpose of the selvage edge on a roll of fabric

It prevents the fabric from unraveling


How are the fabric type and strength requirements determined from fabric covered aircraft

The original manufacturer determines the fabric type and the strength requirements


What types of synthetic fibers are used for covering aircraft

Fiberglass and nylon


Which of the several types of fabric is unaffected by moisture and mildew



What is the function or purpose of reinforcing tape

To prevent the lacing cord from cutting through the fabric


Where would you use surface tape

Over rib stitching and sewed seams, over lapped edges, around corners, and along leading and trailing edges


How should the edges of drainage inspection and ventilation holes be reinforced

With plastic, aluminum, or brass grommets


Fabric is considered unairworthy when it has deteriorated to what percentage of its original strength

Less than 70% or more than 30%


How should a structure that will be covered with doped fabric be prepared following inspection and prior to covering

Treat it with protective coating of paint or varnish


What is the principle advantage of the envelope method for covering wings

Almost all the seams are machine sewed by the envelope supplier


What is a tie off knot

A standard modified seine knot


Name three common types of machine sewed seams

Plain overlap, folded fell, and French fell


Where are anti tear strips used

Used on the upper surface of the wing and bottom used on aircraft that don't exceed speed 250 mph


How would you determine the correct spacing for rib stitching if the original spacing was unknown

Consult the chart in AC 43.13-1B


What type of knot is used for locking the stitches that are used for rib lacing on a fabric covered aircraft wing

A modified seine knot


What are two methods of applying the fabric to the wing of an airplane

Blanket method and envelope method


How wide should the surface tape be that is used to cover the trailing edge of an aircraft wing

Three inches wide


What type of machine sewed seams are used in aircraft covering

Plain overlap seams, folding fell seams, and French fell seams


Aircraft covering fabrics made of materials from what two sources

Organic materials and synthetic materials


What methods are used to check the strength of dope fabric

Fabric punch tester or labitory test


If the original rib stitch facing can not be determined when recovering an aircraft what rib stitch facing should be used

Rib stitch facing chart in AC 43.13-1A


What do you call the edge of cloth, tape or webbing that has been proven to prevent reviling

Salvage tape