What was found
(CAN)AFTER LANDING,THRUST REV LIGHTS SHOWED NORMAL DEPLOYMENT,BUT AFTER SELECTING STOW,THEY REMAINED DEPLOYED & THE UNLOCK LIGHTS REMAINED ON.SELECTING THE EMERGENCY STOW SWITCH STOWED THE THRUST REV. TROUBLESHOOTING, FOUND THAT SWITCHES S153 & S161, IN THE PEDESTAL,HAD BROKEN WIRING.THE SWITCHES ARE ATTACHED TO THE RESPECTIVE POWER LEVER ASSY & THE WIRING LEADING AWAY IS HEAT SHRINK WRAPPED & POTTED IN THE VICINITY OF THE SWITCHES. IT IS IN THE IMMEDIATE AREA OF THE SWITCHES THAT ALL OF THE FAILURES HAVE OCCURRED.BOTH THE LT & RT SWITCHES ARE ROUTED IN THE SAME MANNER,BUT IT IS ONLY THE LEFT SWITCHES THAT ARE CAUSING PROBLEM.