As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AIRCRAFT WAS GROUNDED: SINGLE GENERATOR OPERATIONS AFTER APU GENERATOR AND APU FAILED AT FL 330. DESC ENDED TO FL 310 BUT START UNSUCCESSFULL. AIRCRAFT DIVERTED TO RIC. EMERGENCY WAS DECLARED. APU STARTER ON GROUND. RAN APU SEVERAL TIMES AND RAN BOTH ENGINE WHILE BLEED ON/BOLT AND FREQUENCY GOOD.