John Gilmer wrote:

That's a bit on the low side.

True, BUT, the OP didn't say how long the machine had run before making the
measurements. It may take an hour or more for the AC to cool the ductwork.

If it's not a relatively new "high
SEER machine," the air one the cold side of the air handler should be
between 40F and 50F. (Older machines keep the humidity down by
cooling down to 40F. Newer machines don't take out as much moisture
but make it up by handling more air.)

No (reasonable) A/C can drop the temperature of 130œ air to 50œ immediately.
You cannot judge an A/C by the temperature of the conditioned air alone
without knowing the temp of the incoming air.