Inspection and Repair of Aluminum Propeller Blades. Flashcards
What is the extent of the repairs a mechanic with a powerplant rating can make to a propeller?
Only minor repairs or minor alterations.
Where can examples of acceptable repairs to aluminum alloy propeller blades be found?
In AC 43.13-1B, Chapter 8, section 4.
Is it permissible to cold straighten a damaged aluminum alloy propeller blade to facilitate shipping it to a repair station?
No, this could cause hidden damage that may render the blade nonrepairable.
What would be the classification of maintenance for shortening a propeller blade?
Major repair.
May transverse cracks in a metal propeller blade be repaired?
No, a transverse crack of any size is reason for rejecting the blade.
What damage to an aluminum alloy propeller blade can be repaired by a mechanic holding a powerplant rating?
Small roughness, necks, and scratches in the leading edge of the blades.
How are small nicks removed from the leading edge of a propeller blade?
File them out with a fine file or stone, leaving a smooth contour.
Who is allowed to reduce the diameter of a type certificated propeller?
An FAA-certified propeller repair station with approval for the paticular.
How can you determine that a surface scratch in an aluminum alloy propeller blade is not actually a crack?
Clean the damage out to a saucer-shaped depression and spray the area with a dyepenetrant liquid. Allow it time to seep into crack if one is present, then wipe all of the liquid off the surface. Spray the area with a developer. If the damage is actually a crack, the developer would will pull the penetrant out and it will form a visible line.
