Maybe her best bet is to fly United as a paying customer and then have a “slip and fall” incident at the ticket counter that will have every ambulance-chasing lawyer ringing her phone off the hook.
Exactly! Or if she said that it wasn’t just the vaccination, but that she had been discriminated against as a pilot because she was a woman (e.g. “I was always hearing under the breath comments about being unqualified, and that women belonged in the galley - not the cockpit”).