And left ailerons move up.
And left ailerons move down
Aileron moves up and the left aileron moves down
Aileron moves down and the left aileron moves up.
Discrepancies with a supply document number
Nicked area is near the edge of the plastic and spreading inward
White powdered glass is often seen in a chipped area
Visibility through the nicked area is slight
Chipped area has a smooth appearance
A grid made up of horizontal and vertical lines
Viewing lines through panel at a distance of at least 40ft away
A dark background placed outside of the panel while viewing from inside
A dark grid made up of parallel curved lines of varying lengths and thicknesses
Bubbles are never acceptable
They only impair vision along the edges of the panel.
They are well scattered and within acceptable number, diameter and spacing
They do not impair vision, are well scattered and within the limitations of the TO.
Filled in with aerodynamic smoothing compound
Curved to the precise contour of the repair area
Cut into a circular repair patch
Replaced as soon as practical
How much undamaged area should be removed
If the damage is near a sub-structural member.
If the damage is in an open area.
The final size of the patch.
Stop-drill all cracks.
Relieve stress concentrations.
Make sure the cutout is centered over a sub-structural member.
Anneal the cutout areas so the area is not work-hardened during the cutout operation.
Size and location of the cutout area
Diameter and head style of repair fasteners
Material composition and thickness of the cutout area
Location of existing fasteners within and outside the cutout area
Overall size of the cutout
Material thickness of the repair parts
Number of fasteners required for the repair
Classification of the repair to be accomplished
The damage is in a limited space
The skin and sub-structural damage cutout are the same
The skin and sub-structural damage cutout are not the same
Only the skin is damaged and the sub-structural member is intact
Center point of the cutout area.
Head style of the rivets to be used
Rivet spacing required on the filler plate
Direction of the stress concentrations within the part being repaired
Wrong measurements were used to develop the rivet pattern
Rivet spacing and row spacing are identical
Doubler is twice the size of the filler plate
Edge distance is beyond acceptable limits
Locating the centerline of the cutout area to use as a starting point
Measuring edge distance from the outer edges of the substructural member
Determining the edge distance requirements for the different head styles of the rivets
Placing the lengths of rivets required in the repair because of the substructural member
Existing rivet spacing for the fasteners in the substructural member
Smallest rivet spacing available regardless of where the cutout area is located
Strongest rivet spacing possible based on the diameter of the rivets used in the repair
Rivet spacing used on one side of the cutout, opposite the width of the substructural member
Select material that is one-gage thicker than the skin
Position the doubler material inside the cutout
Develop a fastener layout on the patch plate
Split the doubler into two parts.
Using the cutout area as a template
Using the dimensions of a previously installed flush repair
Measuring the damaged area before making the skin cutout
Multiplying the length of the damage by the width of the damage, and adding the edge distance requirements
Open area with existing fasteners.
Blind area with existing fasteners.
Open area with no existing fasteners.
Blind area with no existing fasteners
Type of cutting tools to use
Location of existing fasteners
Thickness of the parts being repaired
Material composition of the damage parts
Cleaning solvent; applied before painting
Precleaning agent; applied before using an approved solvent
Corrosion preventative; applied before the installation of repair parts.
Bonding agent; applied on repair parts to provide a base for a corrosion preventative
Smooth the edges with sandpaper
Clean the area with distilled water
Smooth the edges with a rotary file.
Clean the area with an approved solvent
Hardness of the material sealed
Hardness of the compound surface
Amount of heat used to cure the compound
Temperature and relative humidity at the time the compound was applied
Equipment manufacturer’s instructions
Technical Order (TO) 1–1–690
Aircraft specific TO
Use a dagger spade or brad point bit
Use a high speed, low-feed when drilling
Use a Carbide or diamond-coated drill bit
Use a split helix bit with either two or four helical flutes
Remove a minimum of sound material
Make the cutout to a round configuration
Use the scarf method to make an oval cutout
Use the step-joint method to make a square cutout
Create a patch drawing
Make a cutting template
Layout a stacking template
Draw orientation lines on the repair patch
Overall size of repair
Number of plies being replaced
Resin used by the manufacturer
Curvature of the area being repaired
Lower in strength
Higher in strength
Lower in strength only when the paste adhesive is a two-part mixture.
Higher in strength only when the paste adhesive is a two part mixture
At right angles to each ply in the original panel
To match each ply in the original panel
At 30° to each ply in the original panel.
At 45° to each ply in the original panel
Fit the innermost patch (largest) to the area first
The first ply is cut so at least ½″ overlaps the inner edges
The first ply is cut so at least ¼″ overlaps the outer edges
The edges of the patch are butted to the existing bond ply
Find the center point of the damage
Remove the top damaged ply
Find the edges of the damage
Remove any paint
Pilot-drill all holes to avoid drilling into cells walls
Step-drill all holes to ensure proper adhesive injection
Drill holes first at the top and bottom of the delaminated area
Drill deep enough into the core material to permit the adhesive flow to remove any moisture present.
Install a 0.010″ aluminum sheet shim
Cut the replacement core larger than the cutout
Cut one disk of adhesive film to the size of the cutout
Ensure the overlap of the patch plate is a minimum of 2″.
One; 2″ from the edge of the heat blanket
Two; 2″ from the edge of the heat blanket.
Three; equally spaced around the damaged area.
Four; equally spaced around the damaged area
Use a tap hammer
Visually inspect area
Re-inspect area using a borescope
Re-inspect area using nondestructive inspection (NDI).
If any distortion caused by the scratch will be removed when the scratch is removed
The thickness the acrylic plastic assembly will be after polishing
If the assembly can be annealed after the polishing operation
The exact width of the scratch
Cool off the sanded area
Prevent the area from crazing
Keep the sanded area lubricated
Wash away the previously used sandpaper grit
Loss of fasteners is reduced
Proper placement of fasteners is ensured
Missing or broken fasteners can be easily ordered.
Torquing requirements can be determined for each size and type of fastener
A mild soap and water solution
An approved solvent
A high detergent soap
The proper fit.
All paint removed
All attaching hardware
Alodine the panel.
Fit test the panel
Prime the panel
Paint the panel
Time is critical
You need to see through the template
There isn’t a piece of metal to be found
The original panel is missing or badly damaged
Performing a tack-free test while the area is pressurized
Checking the adhesion of the seal by removing small sections
Passing a listening device along the seams while the area is pressurized
Applying a water-soap mixture to all seams while the area is pressurized and watching for bubbles.
Cut the faulty section from the fillet
Select the proper sealant cutting tools
Cut around the seal and at the base of the fastener
Grasp the seal with pliers and pull it away from the structure
Use a heat gun to thaw the sealant
Simply thaw the sealant and use it
Use a heat lamp to thaw the sealant
Allow the sealant to thaw overnight
An approved solvent/cleaner
A high pressure water blaster.
When the cleaner dries on the surface
When there is no discoloration on a clean drying cloth
Only after the surface being cleaned meets tack-free requirements
When no discoloration is picked up by one of your fingers touching the area
Discard the sealant
Add more accelerators
Whip air into the sealant
Shop operating instructions