As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
STALL VANE/LIFT DETECTOR GAVE COUNTINUOUS STALL WARNING DUE TO WATER ENTRY INTO SWITCH. 2ND FAILURE. OPERATOR HAS NUMEROUS FAILURES OF SAME TYPE VANES WHENEVER AIRCRAFT FLY IN RAIN. SUBMITTER STATED UNITS NEED TO BE WATERPROOFED. VERY DANGEROUS FAILURE MODE, AS PILOT'S MUST PULL CIRCUIT BREAKER TO SHUT OFF STALL HORN, WHICH LEAVES THEM NO STALL WARNING AT ALL.