What was found
ON DEPARTURE AT 1000' AGL, HYD QTY LOW 4 EICAS ADVISORY MESSAGE, RAN NNC 13.29, SECURED NR 4 HYDRAULIC SYSTEM OFF. T/S PER WDM 29-33-12-2 TO PERFORM WIRING CHKS BTWN HYQUIM D7848CA TO #4 HYD SYS TRANSMITTER DT404, CHKS GOOD & INSULATION RESISTANCE CHCKS NORMAL. R & R CONNECTOR DT404 PER SWPM 20-61-11. OPS CHK GOOD.