Here’s the scenario.
Meter and service disconnect located on exterior.
Service panel in garage.
There is a 90 amp 240v breaker serving an aux. panel for 2 air conditioners.
There is a 3 wire conductor (2 @ 120v and a neutral) from the service panel to the aux. panel.
In the aux panel the conductors are connected to the live busses and a neutral buss.
There are 2 240v breakers for the 2 AC units.
The ground (ECGs) from the AC units are connected to the neutral buss in the aux panel. The aux panel is not grounded.
OKAY or bad news?