As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
PILOT REPORTS LH GENERATOR OFF LIGHT ILLUMINATED ON CLIMB. STARTED APU PER QRH PROCEDURES, AC CROSSTIE LOCKOUT & ACBUSS OFF LIGHTS ILLUMINATE. PLACED BUSS SWITCH BACK TO OFF POSITION. ALL BUSSES POWERED AGAIN. -- REPLACED AC CROSSTIE RELAY AND AC GENERATOR CONTROL PANEL FOR APU. OPS CHECK GOOD.