The Central and Eastern Territorial Directorate (DterCE) of Cerema in France has set up an experimental project about a prestressed concrete bridge beam recovered during the demolition of a bridge. Before testing, an accurate diagnosis of the beam has been achieved. Three series of tests were carried out in 2014: bending tests before reinforcement, after a first phase of reinforcement bonded composite materials, and finally after a second and final phase of reinforcement bonded composite materials. This final test was gradually led to a complete break of the beam. This experience on a PPCBB reinforced with FRP allows us to deliver some first lessons. The real break of the beam was held to a force of about 61 tons, corresponding to a bending at mid-span to about 20 cm. Thereafter, the effort has been decreasing. The complete shearing by delamination of the bonded composite reinforcements (which have thus accompanied the beam to maximum effort of loading), was held to a force of about 59 tons, corresponding to a bending to about 27 cm. The complete break in bending in a controlled section (cracking up in the upper table) was obtained for an imposed displacement of more than 40 cm.