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20 Cards in this Set
- Front
- Back
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Aircraft covering fabrics are made of materials from what 2 sources?
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1. Organic materials
2. Synthetic materials |
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How would you determine the strength requirements for fabric used to re-cover an aircraft?
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The fabric must be of AT LEAST the quality and strength of the fabric used by the original manufacturer.
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What 2 types of organic fibers are used for covering aircraft?
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1. Cotton
2. Linen |
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What is meant by warp, weft, and bias?
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WARP is the direction along the length of the fabric.
WEFT is the direction across the fabric at right angles to the warp. BIAS is a direction at a 45 degree angle to the warp and weft |
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what is the purpose of the selvage edge on a roll of fabric?
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It prevents the fabric from unraveling.
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What identification marking is found on the selvage edge, and in which direction is the warp applied?
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The FAA-PMA stamp is found on the selvage edge and the warp is applied parallel to the line of flight.
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How are the fabric type and strength requirements determined for fabric-covered aircraft?
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The original manufacturer determines the fabric type, and the strength requirements are a function of the never-exceed speed and wing loading.
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What types of synthetic fibers are used for covering aircraft?
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1. Fiberglass
2. heat shrinkable polyester fibers |
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Which of the several types of fabric is unaffected by moisture and mildew?
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Fiberglass
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What is the function or purpose of reinforcing tape?
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To prevent lacing cord from cutting through the fabric.
Used between the fabric and the rib stitching |
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Where would you use surface tape?
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1. Over rib stitching and sewed seams.
2. over lapped edges 3. around corners 4. along leading and trailing edges |
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How should the edges of drainage, inspection, and ventilation holes be reinforced?
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WITH:
1. Plastic grommets 2. aluminum grommets 3. Brass Grommets |
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What are the principle methods used to test the condition of fabric?
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1. Punch testers such as MAULE or SEYBOTH tester
2. Laboratory pull-testing |
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Fabric is considered unairworthy when it has deteriorated to what percentage of its original strength?
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Less than 70%
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How should a structure that will be covered with doped fabric be prepared following inspection and prior to covering?
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Treat it with a protective coating of paint OR varnish as appropriate
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What is the principal advantage of the envelope method for covering wings?
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Almost all the seams are machine-sewed by the envelope supplier.
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what is a tie-off knot?
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A standard, modified seine knot used on all stitches except starting stitch.
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Name 3 common types of machine-sewed seams.
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1. plain overlap
2. folded-fell 3. French-fell |
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Where are anti-tear strips used?
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Under wing rib stitching when the never-exceed speed is greater than 250mph.
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How would you determine the correct spacing for rib stitching if the original spacing was unknown?
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Consult the chart in AC 43.13-1B
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