Gray charter: the risk buyers don’t know they have

The most expensive compliance mistake in charter is one a lot of buyers don’t know they’re making: flying commercially under Part 91 to avoid the cost and discipline of Part 135. The industry calls it “gray charter,” and the FAA spends real enforcement energy on it.

Two tests decide it

It comes down to compensation or hire and holding out. Carry people or property for compensation and offer that service to the public, and you’re a common carrier — which requires a Part 135 certificate. “Compensation” is read broadly: reimbursement, goodwill, even logging valuable flight time can count.

The risk isn’t just a fine

Operators fixate on FAA penalties, but the sharper edge is insurance. If a flight was conducted illegally, your insurer can deny the claim — and after an accident, that leaves owners and pilots personally exposed in a way no civil penalty matches. The savings from skipping 135 evaporate the first time something goes wrong.

We built a free decision tool that walks the common-carriage factors and shows where an operation likely lands: Part 135 or Part 91? It’s informational, not legal advice — but it starts the right conversation.

Why we publish this

Teaching buyers to spot gray charter doesn’t shrink our market — it sharpens it. Every operator who decides to do it right is a future customer for a tool whose whole job is making “doing it right” fast.