As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
STC NR ST00092LA. TWO ITEMS RETURNED, BOTH WITH DATE CODE 9521. BOTH WITH SIMILAR DAMAGE. BURN DAMAGE RESTRICTED TO THE LAMPHOLDER CONTACTS AND SURROUNDING AREA WITH AN 0.1 INCH AT THE LAMP CONTACT LOCATION. SUSPECT CAUSE IS ON INTERMITTENT CONNECTION BETWEEN THE LAMP AND LAMPHOLDER.