A PSA Airlines Canadair CRJ-900 on behalf of American Airlines, registration N566NN performing flight AA-5145 from Charlotte,NC to Augusta,GA (USA), was climbing out of Charlotte when the crew stopped the climb at 16,000 feet and returned to Charlotte due to a potable water indication. The aircraft landed safely back in Charlotte about 30 minutes after departure.
A replacement CRJ-900 registration N568NN reached Augusta with a delay of 2 hours.