As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
REF. FR26481. AIR LEAKING AROUND FORWARD CASE. AFTER EVALUATION AND ANALYSIS, DETERMINED ACM HOUSING HAD UNAUTHORIZED MODIFICATION DONE OUTSIDE OF HAMILTON STANDARD. IT WAS MODIFIED FROM A R72/EC53A HOUSING (MILITARY APPLICATION ONLY) TO ACCOMODATE R80/EC35A PARTS AND COMPONENTS.