I still think that all work done on the ramp/line should be recorded in the tech log. If the work is on a work pack, which includes the CRS then there should still be an entry in the tech log to refer to that work pack and a brief description of what the work was, i.e. '#1 ACM replaced due time ex' etc etc. At least this way the flt crew have an idea of what has gone on with the aircraft and also maintenance crews (especially on the outstations) have instant access to the previous work carried out. I have worked and still do on some airlines where it is not necessary to record the day to day line work in the tech log, purely use 'work sheets' that have no reference in the tech log ....dangerous in my opinion...