The Cessna 120-140 Association Forum

My hinge pin keeps working its way out during flight. Suggestions to keep it in place?

Here is a visual. I push it back in place and after the next flight, it's already started to work back out.

Push it in until it is recessed about 1/8" into the hinge then crimp (flatten) the end if hinge over. Shorten the pin so it doesn't stick out the back, if necessary; the back should also be crimped.

6643 wrote: ↑Mon Jun 03, 2019 7:10 am Push it in until it is recessed about 1/8" into the hinge then crimp (flatten) the end if hinge over. Shorten the pin so it doesn't stick out the back, if necessary; the back should also be crimped.

Got it, I'll look next time I'm at the hangar and give it a go.

Thanks!

Back in the NL archives there's a chilling article by our NL editor describing his forced landing due to the hinge pin creeping forward into the propeller on his 120. Apparently, if (when?) it occurs, the noise and vibration and potential "digging" damage to the prop comes pretty fast. Mac

8233 wrote: ↑Sun Jun 02, 2019 11:33 pm My hinge pin keeps working its way out during flight. Suggestions to keep it in place?

Here is a visual. I push it back in place and after the next flight, it's already started to work back out.

IMG_0419.jpg

(Hey, David -- your Red, White & Blue stepladder fits well with your plane! )

2066 wrote: ↑Mon Jun 03, 2019 9:33 am (Hey, David -- your Red, White & Blue stepladder fits well with your plane! )

LOL, wish I could take credit but that's the ladder at the fuel pump at my home base.

2066 wrote: ↑Mon Jun 03, 2019 9:33 am the hinge pin creeping forward into the propeller

6643 wrote: ↑Mon Jun 03, 2019 11:13 am

2066 wrote: ↑Mon Jun 03, 2019 9:33 am the hinge pin creeping forward into the propeller

Had that happen one time. I've also seen a hinge pin mark up a wooden propeller bad enough that it should not have been used.