What was found
AFTER TAKEOFF THE CREW RECEIVED A REVERSER UNSAFE MESSAGE. RAN QRH AND RETURNED TO CAK. DEFERRED LT THRUST REVERSER. SUPPLEMENTAL INFORMATION: REMOVED AND REPLACED THE FOLLOWING: STOW SWITCH, POWER DRIVE UNIT, ORANGE HARNESS, THROTTLE LOCKOUT SWITCH, EMERGENCY STOW PUSH BUTTON SWITCH. MEL WAS CLEARED ON 28JUL19 BY INSTALLING A WIRE ALONGSIDE EXISTING HARNESS FROM CONNECTOR P125-X TO TB117-2 PER REO 601R-78-30-4283. HOWEVER IT FAILED AGAIN AND THE AIRCRAFT HAS RETURNED TO CAK. C/W BBD ACTION PLAN. REMOVED AND REPLACED TB205-5 AND TB207-7 IN JB4. REMOVED AND REPLACED CONTACT PINS ON TB205-5 PINS K AND E AND TB207-7 PINS K AND E. OPS CHECK GOOD.