As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
LEFT THRUST REV GREEN LIGHT COMES ON, HOWEVER HANDLE DID NOT GO PAST INTERLOCK. AIRCRAFT BACK TO BLOCK AND GROUNDED BY MAINTENANCE. MAINTENANCE PERFORMED OPERATIONAL TEST OF BOTH LEFT AND RIGHT REVERSER SYSTEMS. BOTH MESSAGES CLEARED . OPS CHECK GOOD. REF B767 AMM 78-30-00. AIRCRAFT RETURNED TO SERVICE