As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
APU GEN BUSES WILL NOT COME ON LINE WHEN SELECTED. GROUNDED - YES. PERFORMED OPS TEST FOR THE AC GENERATION AND CONTROL SYSTEM IAW AMM 24-24-00-700-803 STEPS 2A THROUGH 2E(Z)(4). BOTH APU BUS TIES OPERATE NORMALLY. NO FAULTS NOTED. NO CHANGES TO AIRCRAFT CONFIGURATION. PLACARDS REMOVED. SEAMC NOTIFIED.