Shared Flashcard Set

Details

Wood Structure-DME Oral
Airframe ASA 15 Questions
15
Aviation
Undergraduate 1
09/06/2015

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Cards

Term
What forms of wood, other than solid wood, are used in aircraft?
Definition
Laminated and plywood
Term
What are the approved types of glues used in aircraft wood structure repair?
Definition
Casein and resin or any glue approved by the manufacturer
Term
What species of wood is used as a standard for strength properties?
Definition
Spruce
Term
Are hard knots acceptable?
Definition

Yes, within the limitations of AC 43.13-1A

Term
What type joint is generally used in splicing structural members?
Definition
Scarf joint
Term
How may plywood be prepared for bending?
Definition
Soaking in hot water
Term
What methods are used to apply pressure to wood glue joints?
Definition

Brads, nails, screws, clamps and presses

Term
What area of a wood spar may not be spliced?
Definition

Under a wing attachment, landing gear, engine mounts and lift strut fittings

Term
What is the maximum number of splices that should be made to any one spar?
Definition
Two
Term
What is the minimum temperature for curing wood joints with resin glue?
Definition
70 degrees F
Term
When are mineral streaks acceptable?
Definition
If inspection fails to reveal any decay
Term
What method will prevent a patch and a plywood pressure plate from adhering together due to extruding glue from the patch?
Definition
The use of waxed paper between the patch and pressure plate
Term
Why is it necessary to examine all stains and discoloration carefully?
Definition
To determine whether or not they are harmless, preliminary or advanced decay
Term
Why are light steel bushings sometimes used in wooden structures?
Definition
To prevent crushing the wood when the bolts are tightened
Term
What are the results of insufficient gluing pressure?
Definition
Thick glue lines and a weak joint
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