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Flap Track Wear Gauge

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Part# 05-02145
MFR Model# 950


McFarlane Aviation Products has developed a new tool to determine Flap track wear. McFarlane developed this tool to positively indicate when the flap track is worn beyond service limits.

Flap Track Wear Gage
Use to determine if a Cessna flap track is worn beyond service limits.

Flap Track Wear Gage Instructions: Run the gage plug along each slot in each flap track while verifying that the gage will not enter the slot. Reposition the flaps as required to gage the entire length of each slot. If the gage enters a slot at any point the track is worn beyond service limits. The diameter of the gage is .6035 inches (diameter tolerance +.000/-.002)Periodically verify the gage diameter by measuring the age diameter with a calibrated micrometer.


This gauge was easy to use. Luckily all mine were in tolerance!

Robert S Verified Purchase


December 1, 2021

Easy to use. Perfect for the task

Trond G
March 2, 2021

Precise and easy to use.

Kenneth A
March 1, 2021


Please note, Aircraft Spruce's personnel are not certified aircraft mechanics and can only provide general support and ideas, which should not be relied upon or implemented in lieu of consulting an A&P or other qualified technician. Aircraft Spruce assumes no responsibility or liability for any issue or problem which may arise from any repair, modification or other work done from this knowledge base. Any product eligibility information provided here is based on general application guides and we recommend always referring to your specific aircraft parts manual, the parts manufacturer or consulting with a qualified mechanic.

Q: If this measures the wear of the flap track and tells me that the track is too worn, should I replace the track or the flap? What is the width of the red handle? Where does that end go?

The tool tells you if the slots in the flap tracks themselves are worn beyond service limits. This would tell you if you need to replace the flap track itself.

The red part of the handle is simply the handle area where you hang on to it.

The circular ball area on the other end is what you run along the slots in the flap track and if at any point that circle drops down into the slot the flap track is worn.

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