Flying a civilian Skymaster without prop spinner

[RandyArizona]

Originally Posted by CO_Skymaster

Hello,

but mine were removed by an A&P

Karl

They are still available, I assume, so why not put them back on... ?
Just curious, I have no dog in this fight.

[CO_Skymaster]

I was planning to put them back on since the current A&P removed them, but I was thinking about a few issues:

1. Was the owner was allowed to remove and install propeller spinners. The A&P opened several maintenance covers, but I believe an owner/operator can open these to inspect without an issue. The propeller spinners where the only item removed that I was unsure about. Would I have to find another A&P to reinstall them and did they require balancing. My thought was they may be like car hubcaps with a lot of screws. Would the FAA allow my ferry permit if I did that.

2. If there were extra steps to install, would it be better to place all the screws in zip lock bag and take the propeller spinner with me to have them install at the new A&P performing the annual. That might have been easier.

Thanks for the advice,

Karl

[RandyArizona]

A ferry permit will require a Mx sign off, and if you don’t know what your a&p did in those inspection panels, ( I’m assuming that’s what you meant by “covers”.); then by flying it… well you get the idea.
Not sure how or why or even IF you’re crossways with this mech, but I would be cautious in attempting to fly this aircraft.
Is there another mech you can get help from, if you are in need of another mech?
The spinner bulkheads, without spinners, will fold back under rpm from the prop. I wouldn’t run it up to high rpm’s without spinners.
As an FYI, a ferry permit will allow one to fly an “unairworthy” aircraft.

[Jhogan0101]

A “buddy” of mine flew about 20 hours in 2 months while he was waiting for a new front spinner.
Nothing different or bad happened.

[kbecker]

Did they take the spinner bulkhead off before flying it without the spinner?

Kevin

[Jhogan0101]

No, was in place.

[mshac]

When I ran a flight school in Florida, we had a fleet of 172s. They had hundreds of hours per year put on them, and the spinners generally only lasted 2-3 years before they developed bad cracks. The bulkheads never seemed to fail, but the spinners would develop cracks that eventually could not be safely stop-drilled anymore.

Replacing spinners was so common that we kept a supply of spares. Often the instructors would do the swap with their students. I did several myself. There's really not much too it, just be certain to get the screws in tight so they don't vibrate out. The A&P would sign it off later. I don't recall him ever having any issue with the work that had been done by the instructor/student.

YMMV