What was found
WHEN L/G WAS SELECTED TO DOWN, OBSERVED NO LIGHTS. L/G SELECTOR C/B WAS TRIPPED. AFTER RESETTING C/B GEAR WAS EXTENDED AND BACKED UP WITH NR 2 SYSTEM (PROCEDURE A) L/G SELECTOR C/B TRIPPED AGAIN (MEM). FOUND SHORTED CANNON PLUG AT 16G1. REPLACED CANNON PLUG WITH SERVICEABLE UNIT. OPERATIONAL CHECKS GOOD ON SEVERAL CYCLES IAW AMD MM 32-30. AIRCRAFT RETURNED TO SERVICE. (M)