What was found
AFTER T/O, ENG NR 1 REVERSER OPERATING LIGHT CAME ON NR 1 ENGINE, SHUTDOWN AS PER PROCEDURE. A/C RELEASED FOR SERV PER MEL 78-2A. CHECKED WIRING HARNESS AT SWITCH FOR CONDITION, FOUND GOOD. CHECKED SW ADJ, WITHIN LIMITS. DURING T/S HAD NR 1 T/R OPS LIGHT GLOW DIM FOR SEVERAL SECONDS AND EXTINGUISH, WHILE NOTHING AROUND SW WAS TOUCHED. SUSPECT EITHER INTERNAL FAILURE OF SW (P/N B27-78-064-01) OR LIGHT SOCKET (10-61803-78). REPLACED NR 1 T/R SW, OPS CHECK GOOD.