Which task is NOT included in the checks a Powerplant-rated mechanic is allowed to perform on a propeller?

• A. Check the track of the blades
• B. Remove small nicks and scratches
• C. Check the dynamic balance
• D. Replace the propeller with a new unit

Answer: (D)

A Powerplant-rated mechanic is limited to checks and minor maintenance on a propeller rather than replacing the entire unit. Verifying blade track and performing balance checks are typical inspection tasks that ensure the propeller runs true and vibrations are within limits. Removing small nicks and scratches is likewise a repair- within-allowance activity when done with approved methods and within limits. Replacing the propeller with a new unit goes beyond routine checks and repairs and requires additional authorization or a different rating, so it is not included in the checks a powerplant-rated mechanic may perform.