What was found
WHEN FIRST OFFICER TURNED ON BEACON, A SPARK CAME FROM THE SWITCH WITH AN ODOR OF SMOKE. LOWER BEACON CIRCUIT BREAKER TRIPPED. ACCOMPLISHED EO 3340-54311A. REMOVED, CAPPED, AND STOWED RING TERMINAL 2 FROM LOWER BEACON CIRCUIT BREAKER. VERIFIED SHORT REMOVED. REPLACED LOWER ANTI-COLLISION LIGHT ASSY IAW MM 33-48-12-0401. OPS CHECKED NORMAL IAW 33-48-00-0501.