As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ETOPS SIGNIFICANT SYSTEM, AFTER BLOCK IN AT GATE F/A REPORTED (LIGHT) SMOKE IN CABIN. REMOVED AND REPLACED APU IAW FORM HAL-M266-767. LEAK CK AND OPS CK OKAY. PERFORMED TASK21-00-21-102-030. REMOVAL OF OIL CONTAMINATION FROM AIR COND AND PNEU.