As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
UNIT INSPECTED FOR CERTIFICATION AND BATTERY REPLACEMENT. FOUND DURACELL BATTERIES (D-CELLS) LEAKING IN BATTERY COMPARTMENT. BATTERIES REMOVED, AREA CLEANED, ALSO NOTED SURFACE CORROSION ON BATTERY CONTACT SPRING. CORROSION REMOVED WITH ACID BRUSH AND IPA (ALCOHOL). BATTERY BOX RE-INSPECTED, NEW BATTERIES INSTALLED, UNIT FUNCTION TESTED AND MET SPECIFICATIONS.