As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING PUSHBACK, APU GENERATOR DROPPED OFF LINE. GEN COMES ON LINE FOR 5 SECONDS THEN DROPS OFF LINE. TROUBLESHOT AND FOUND OPEN FIELD ON T2-N,T-3-N. REMOVED AND REPLACED APU GENERATOR PER BOEING 767-300 AMM 24-21-01. OPS AND LEAK CHECKS GOOD.