As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
WHILE INVESTIGATING AN OIL LEAK ON THE RT ENGINE, DID A DYE PENETRANT INSPECTION OF THE AIR PUMP ADAPTER, AND FOUND IT CRACKED IN THE AREA OF THE FLANGE THAT MATES WITH THE ENGINE ACCESSORY CASE. SUBMITTER STATED THEY FIND THIS A COMMON DEFECT IN FLEET OF 17 QUEEN AIR WITH AT LEAST 8 OCCURRENCES A YEAR USUALLY AROUND THE AREA OF THE ATTACHMENT POINT HOLES OF THE FLANGE.