As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AVIONICS VENT C/B POPPED AND COULD NOT BE RESET. WHEN TESTING ANNUNCIATOR LIGHTS ELECTRICAL SMOKE ODOR AND "ANNUNCIATOR LIGHT TEST" C/B POPPED OUT. RESET OK. REMOVED AND REPLACED DIODE BOX 22VD IAW JIC NR 20-45-10 AND OPT CK OK. RELOCATE WIRE TERMINAL PLU A/B AT CONNECTOR 22VT IAW AWM STANDARD PRACTICES NR 20-45-11, AWM NR 33-14-01 AND NR 21-51-05. OPT CK OK.