Your friends will probably want to form an LLC for the ownership of the aircraft with their names as the owners of the LLC. Leave their business names put of the LLC for liability reasons.
Common misconception. LLCs don't do anything to reduce liability that carrying enough insurance won't take care of. Why do hundreds of Fortune companies have their aircraft registered under their corporate title?
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This also help keep the operation legal. Chances are good that they will want to fly the plane for personal as well as business use, and this is where you can get into trouble.
Business or pleasure, it doesn't matter how the airplane is registered. The IRS is the only agency that cares for what purposes the airplane was flown.
Be sure that you are operating within the bounds of 91 subpart F. Subpart F describes joint ownership, time-share agreement and leases.
...for large turbine aircraft and aircraft operating under subpart K, neither of which a Cessna 414 or similar owned by two golfing buddies would ever be.
The LLC that owns the aircraft can lease the aircraft to the comanies the individuals own. This will keep you safe from FAA speculation that you might be chartering the airplane. Don't mess around with that. It's a good way to get in trouble.
Sound advice. LLCs with dry lease agreements (and pilot service agreements...more on that in a minute) are the best way to avoid scrutiny by the FAA. Again, however, they don't do jack squat to reduce liability.
As far as being an employee rather than a contract pilot for them, that may be a little more difficult. You'll have to be an employee of one of the owner's companies for this to work. Theoretically they could set you up as an employee of the owning LLC...
The way we operate is as follows; there are two entities on the "flight department" side of the operation, and a minimum of 5 contracts/agreements between owners, a pilot LLC and aircraft LLCs. The pilots are employees of yet ANOTHER LLC. There is one aircraft dry lease agreement for each company/owner, a pilot service agreement between the Pilot LLC company and each company/owner, and a management service agreement between the Pilot LLC company and Aircraft LLC company.
Be careful of the
FLIGHT DEPARTMENT COMPANY
You mention liability over and over again. Consider this; if you're an employee of one of the companies, and you buy the farm, you're a HUGE liability to your employer.
Just be sure you run your plans by an aviation attorney, and they'll keep you safe.
Best advice so far. And remember, you get what you pay for.