What was found
FLT#816, SFO-JFK. (ETOPS) STATUS II MX MESSAGE AC GEN ( CLASS II MX MSG - GPCU OR AC GEN); T/S PER TSM 24-22-00-810-832-A, UPON PERFORMING WIRING CHECKS FOUND RESISTANCE FLUCTUATING BETWEEN PINS 4000XU-B, PIN 3 AND GCU #2 BACKSHELL A-A13-B. ALL OTHER WIRING CHECKS GOOD. R+R OF #2 ENG IDG HARNESS AMM 71-51-40. OPS CHECK GOOD, NO FAULTS/ MESSAGES AT THIS TIME. MDDR CLEARED MX-4 UPDATED PLACARD REMOVED.