An ambitious, ¤13 million ($15.8 million) search effort failed to find the flight recorders that could explain why Air France Flight 447 crashed a year ago in the Atlantic depths, investigators said Tuesday. The third search for the remains of the Airbus 330 wrapped up Monday, AP quoted Alain Guilldou of the French air accident investigation agency BEA as saying. The search "did not allow us to locate the wreckage of the airplane," he said in an e-mailed statement Tuesday. The BEA is not commenting further on the search, or on whether there could be another search effort at a later date. All 228 people aboard the flight, traveling from Rio de Janeiro to Paris, died when it crashed June 1, 2009. Initial search efforts found some 50 bodies and more than hundreds of pieces of the plane, including its torn-off tail.