On August 2, 2017, at 1551 universal coordinated time, a Cessna 152, CS-AVA, experienced a loss of engine power during cruise flight. A forced landing was performed on a beach near Praia de São João da Caparica, Portugal. During the landing, the airplane struck two people on the beach. The airplane sustained substantial damage. The flight instructor and a student pilot were uninjured, and the two people on the ground were fatally injured. The instructional flight departed from Cascais Municipal Aerodrome (LPCS), Tires, São Domingos de Rana, and was destined to Évora Airport (LPEV), Évora. The accident investigation is under the jurisdiction and control of the Gabinete de Prevenção e Investigação de Acidentes com Aeronaves (GPIAA). This report is for informational purposes and contains only information released by or obtained from the government of the Portugal. Further information pertaining to this accident may be obtained from: Gabinete de Prevenção e Investigação de Acidentes com Aeronaves (GPIAA) Praca Duque de Saldanha, 31 – 4ºAndar 1150 - 094 Lisboa Portugal Tel.: (351) 212739230 E-mail: geral@gpiaa.gov.pt Fax: (351) 212739260