What was found
"B" AUTOPILOT UNCOMMANDED DISCONNECT AT 13,000 FT DURING VNAV DESCENT, NO OTHER FAULTS NOTED. DESCENT AND SPEED NORMAL AND ON PROFILE. ACFT GROUNDED. REF WDM 27-32-21, FOUND INTERMITTENT 28VDC AT CONNECTOR D3685A PINS 1 & 13 WHILE SHAKING WIRES BEHIND RACK CONNECTOR. UPON ARRIVAL AT HANGAR, COULD NOT DUPLICATE. VERIFIED GOOD 28VDC AT D3685A, PINS 1 & 13. REF WDM 27-32-11. DFCS BITE CHANNEL B FAULT REVIEW SHOWS 22-11082. BEGAN FIM 22-15, TASK 801. NO FINDINGS THROUGH STEP (2). FOUND RESISTANCE ISSUE BETWEEN D40006 PIN 1 & D3683A PIN 35. CLEANED PINS, OPS NORMAL. COMPLETED LAND VERIFY IAW MM 22-01-00. OPS NORMAL.