What was found
FLIGHT 5709 - ON ARRIVAL AT THE GATE IN BOS AND UPON SHUTTING-DOWN THE APU, SMOKE WAS OBSERVED FROM THE APU DUCT. SMOKE HAD FILLED THE AFT EQUIPMENT BAY. DEFERRED THE APU PER MEL 49-10-01-2.
As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
FLIGHT 5709 - ON ARRIVAL AT THE GATE IN BOS AND UPON SHUTTING-DOWN THE APU, SMOKE WAS OBSERVED FROM THE APU DUCT. SMOKE HAD FILLED THE AFT EQUIPMENT BAY. DEFERRED THE APU PER MEL 49-10-01-2.