As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
VENDOR UNKNOWN. IN JULY, APPROXIMATELY 40 CYCLES, THE SOLENOID WOULD NOT FUNCTION. REMOVED/REPLACED WITH GOOD UNIT. DRILLED 4 RIVETS ON CAP AND FOUND THE ENTIRE INTERNAL PLUNGER/CONTACT DISC/STUDS COVERED WITH CORROSION. SUBMITTER STATED WHATEVER IS USED PRIOR TO ASSEMBLY IS CAUSING SAME.