Example: Evidence obtained during the processing of the annuitant's claim showed that the annuitant had an impairment that was expected to improve about 18 months after the annuitant's disability began. The Board, therefore, told the annuitant that his or her claim would be reviewed again at that time. However, before the time arrived for the annuitant's scheduled medical reexamination, the annuitant told the Board that he or she had returned to work and the annuitant's impairment had improved. The Board investigated immediately and found that, in the 16th month after the annuitant's began, the annuitant returned to full-time work without any significant medical restrictions. Therefore, the Board would find that the annuitant's disability ended in the first month the annuitant returned to full-time work.