As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
(CAN) DECREASED OF 15 RPM OBSERVED IN FLIGHT. LEAK CHECK COMPLETE AND LEAK FOUND ON ACCUMULATOR P/N : 366A54-1088. ACCUMULATOR B-NUT TIGHT AND LEAK CHECK COMPLETED, LEAK FOUND ACCUMULATOR REMOVED FROM AC AND FOUND CRACK AND FALL IN 2 PIECES REPLACED WITH NEW ACCUMULATOR. AC SENT BACK TO SERVICED. (TC NR 20051208007)