As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
APU GEN FAILURE, FLT DIVERTED. APU GENERATOR FAIL TO COME ON LINE AFTER HIGH ALT START. APU OIL WAS LOW UPON ARRIVAL. APU OIL SERVICED TO FULL. ATTEMPTED APU START. EXCESSIVE SMOKE OUT OF APU TAILPIPE. APU OIL SIGHT GLASS INDICATES OIL SERVICE NEEDED AGAIN. OIL FOUND IN APU TAIL PIPE. APU PLACED ON MEL DUE TO NO PARTS.