Q. I am in CSRS and expect to retire when I have 42 years. I know unused sick leave is added to my length of service on a monthly calculation. I also know, however, that 42 years of service equals the maximum retirement of 80 percent. If I retire with an unused sick leave balance of nine months (which is what I have), will this be lost because I have reached the 42-year/80 percent cap, or is there some other factor? A. You reach the 80 percent limit when you have 41 years and 11 months of creditable service. The…