As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ALTERNATOR FAILED WHEN GEAR WAS RETRACTED. GEAR LOWERED AND RETURNED TO FIELD. PILOT REPORTED ALTERNATOR CHANGED ABOUT 10 HOURS AGO AND REGULATOR CHANGED ABOUT 20 HOURS AGO FOR SAME PROBLEM. FOUND ALTERATOR DRIVE SHEARED. REF: SPECIAL AIRWORTHINESS BULLETIN NR ANE 97-04 DATED JULY 24, 1997. INSTALLED NEW DRIVE, OPERATION CHECKS GOOD.