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Module 17. Propeller

Minor surface damage located in a repairable area, but not on the leading or trailing edges of aluminium blades, may be repaired by first
• filing with a half round or flat file.
• sanding and applying a proper filler.
• filing with a riffle file.

mwongela asking:
• now am torn between two answers. previously the system gave me the answer to be sanding and applying a proper filler and now it is saying the right answer is filing with a riffle file.which one is the correct answer?

Community comments: 2

obrien99
Posts: 17
18.12.2012 / 23:45

This is an informed guess.
think the key in the question is "aluminium blade" damage to aluminium blades can be blended out if within limits using a riffle file.

whereas blades with a composite construction would be repaired with a filler

hope this helps

c.stravopodis
Posts: 4
19.10.2025 / 20:13

Hello there,

My Part-66 basic traning states that for aluminum blade props may also be repaired with filing and riffle file.

The combo answers above are also 50% right, thus the other 50% may be misleading.

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