What was found
TRIED NEW DFDR, DFDAU BOTH NO HELP. FOLLOWED FIM 31-31-00-PG 107-110 REPLACED K206 RELAY, NO HELP. FOUND 115VAC AT PIN 9 OF K206. RANG WIRING FROM RELAY TO DFDR AND HAD CONTINUITY. PER FIM, WHEN AIR GRD SYS 2 CIRCUIT BREAKER PULLED FLT REC 'OFF' LIGHT DOES NOT EXTINGUISH. TRIED NEW FLT REC CTRL PNL, NO HELP. ALL ORIGINAL UNITS REINSTALLED. TRIED KNOWN GOOD "DFDR" AND "DFDAU" -- STILL NO HELP. NEED CONTINUE FIM 31-31-00 BLOCK-3 PG 109. REPLACED FLT DATA RECORDER, NO HELP. TROUBLE SHOOTING TREE MM31-31-00-0101 PAGES 107-110. SYSTEM FAULTS ON FACE OF DFDR OR DFDAU. FOUND PIN NR 23 AT CONN D13 A IS INTERMITTENT, NEED PIN REPLACEMENT WDM 31-31-01, PG1A. REPLACED CONNECTOR D13, INSTALLED DATA RECORDER M200 PER MM, TESTS OKAY.