What was found
FLT 40 - HNL-ITO - SWITCHING FROM EXTERNAL TO APU ELECTRICAL POWER, SMOKE BEGAN BELLOWING OUT OF CIRCUIT BREAKER PANEL NEAR THE G-5 GENERATOR CONTROL BOX, POWER SECURED. REPLACED GCU. OPS CHECK OK. AIRCRAFT RETURNED TO SERVICE. (M)
As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
FLT 40 - HNL-ITO - SWITCHING FROM EXTERNAL TO APU ELECTRICAL POWER, SMOKE BEGAN BELLOWING OUT OF CIRCUIT BREAKER PANEL NEAR THE G-5 GENERATOR CONTROL BOX, POWER SECURED. REPLACED GCU. OPS CHECK OK. AIRCRAFT RETURNED TO SERVICE. (M)