SMS consulting usually comes from one side of the house. Either the consultant knows airplanes and learned management systems from a slide deck, or they know management systems and have never signed off a logbook.
Part 5 sits exactly at the seam between those two worlds. That seam is where Seneca was built to work.

Who runs it
I came up through Army aviation and hold an FAA airframe and powerplant licence. Aviation maintenance teaches you one lesson before all others: the record is not paperwork. The record is the thing that establishes whether an aircraft is airworthy. If it is not written down, signed, and dated, it did not happen. That framing never left me.
The second half of my career has been spent as an HSSE director, holding the ASP and running at enterprise scale exactly the machinery Part 5 describes: hazard registers, risk assessment, management review, audit response, corrective action tracking. When the FAA wrote the SMS rule, it described my day job in aviation vocabulary.
So the system you get is not a template with your logo on it. It is built by someone who knows what a working register looks like, what an auditor pulls first, and what a line pilot will actually report into.
A nine-aircraft certificate does not need an airline’s safety department. It needs a manageable system with a named owner that fits inside the week the operation already works. Overbuilt systems fail for a predictable reason: nobody runs them, so they produce no evidence, and evidence is the whole game.
The Declaration of Compliance is a signature on a functioning system. Risk assessments performed, reports received and closed, training documented, reviews held. We build for the receipts from day one, because that is what the inspector reads. The manual comes second.
The Stoics were interested in the line between what you control and what you do not. In flight operations that line is not philosophy. It is the whole discipline. You do not control the weather, the customer pressuring the schedule, or the part that fails at altitude. You control whether the hazard was identified, whether the risk was assessed, and whether anyone verified the control worked.
Qualify. Maintain. Protect. Build the system right, keep it alive, and the protection follows.