This paper discusses well integrity evaluation using LWD sonic monopole data. The first part of the paper explains the methodology which enables full range cement bond index determination i.e. 0 to 1; a hybrid method which uses both amplitude and attenuation through a receiver array (Pistre et all, 2014). The methodology was enhanced at each processing step to be applicable in wide range of conditions including quality control of the processing results. The later part of the paper shows a real world example that demonstrates how the data was used as input to decisions regarding well integrity. With the example case study, the benefits of LWD cement evaluation were confirmed.