What was found
THRUST REV (R) UNLOCK MSG CONTINUED TO DISPLAY INTERMITTENTLY EVERY FEW SECONDS FOR THE LAST 10-15 MIN OF FLIGHT. INTERFERES WITH SAFE OPERATIONS. VERIFIED MEL PROCEDURE, T/R DEFERRAL CORRECTLY. A/C OK FOR SERVICE AT THIS TIME PER MEL 78-30-01. REMOVED AND REPLACED RT ENGINE T/R STOW SWITCH IAW AMM 78-37-01. RIGGED STOW SWITCH IAW AMM 78-37-01. OPS CHECK- GOOD THIS CLEARS DM 55454. PLACARD REMOVED.