As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
COIL MFG DATE 7-19-89. MAG SHOWED SLIGHT MISS DURING BENCH TEST. INSPECTION SHOWED COIL SECONDARY CIRCUIT OPEN AND COIL CRACKED ON END NEAR CORE LAMINATIONS. SUBMITTER STATED SEEING SAME PROBLEM MANY TIMES WITH THIS SERIES COIL. CONTINUED USE OF THIS COIL WOULD LEAD TO COMPLETELY DEAD MAG.