You´re right-DA, not PA (typo).....standard is somewhat around 8000-9000 ft...
Wilson (from where the aircraft is launching) is even higher at almost 5600 feet....Temperatures are usually at around 26-28° (at time of accident, 26° were reported).
Lets assume the were at 1000 ft at 26°, they were just below 10.000 ft DA....