Wood Structures Flashcards
What is a laminated wood assembly?
2 or more layers of wood with parallel grain
What effect does room temperature have on gluing wood structures using resin glue?
curing time and joint strength
Why is it necessary to examine all stains and discolorations of wood carefully?
to determine harmless, preliminary or advanced decay
What is the result of insufficient gluing pressure?
weak joint and thick glue lines
What species of wood is considered the standard for aircraft wood?
Spruce
During preliminary inspection of an aircraft, what instrument is used to determine the moisture content of a wooden structure?
moisture meter with probe
What mechanical testing tools can be used to detect defects in the wood structure?
plastic hammer, sharp metal tool
When installing a reinforcing plate on primary wood structure, why are the ends feathered out?
to relieve stress
When inspecting a wood structure, what is an acceptable percentage of moisture content?
8-11%
During a destructive test of a sample bonded joint, what observation indicates the properties of a good bond?
does not break on glue line
What inspection aid can be used to detect spar compression failures when no access is provided through inspection holes?
flashlight, bore scope
What type of patch is preferred when repairing the damaged skin area of a plywood structure?
scarfed patch
Who should be contacted when the replacement of wood structure is replaced with a wood substitute or modified woods?
The FAA
When selecting bushings for repair, why should the bushing be slightly shorter than the wood thickness?
to allow the fastener to attach to the wood structure and not the bushing
What species of wood is used as a standard for strength properties/
spruce
