Cessna F152T CS-DDY Runway Excursion at Cascais Municipal Aerodrome

Overview and Flight History On 2 July 2005, a Cessna F152T, registration CS-DDY, owned by Escola de Aviação Aerocondor, was conducting a local training flight at Cascais Municipal Aerodrome. The aircraft departed runway 35 at 08:25 UTC with an instructor and a student pilot aboard. The flight was part of an Airline Pilot Course. After 1 hour 10 minutes of supervised flight, during which the student completed eight takeoffs and landings, the instructor exited the aircraft and directed the student to complete three solo circuits. The student completed two touch-and-go circuits without incident and began the third. After landing, the student rolled down the runway toward taxiway S and applied brakes to exit via taxiway R. Upon braking, the aircraft deviated to the left. Attempts to correct using differential braking were unsuccessful. The aircraft left the runway, accelerated over grass due to the terrain slope, and approached a drainage ditch on the western side of the runway. ## Accident Sequence and Damage Approximately 25 meters from the runway edge, the right main wheel struck a surface-level sewage pipe. The aircraft then entered the ditch nose-first, striking the concrete side wall with the propeller and engine cowlings before sliding to the bottom. The left wingtip struck the opposite bank, and the windshield broke against the wall, causing structural deformation of the wing and fuselage. The pilot exited the aircraft unassisted and was recovered by aerodrome rescue services. The aircraft sustained severe damage, including a bent structure, damaged right main landing gear, a crushed propeller hub, bent propeller blades, a bent engine cradle, deformed wings, ruptured fuel tanks, and a deformed cockpit with shattered plastic surfaces. No third-party damage was reported. ## Investigation Findings The investigation found no evidence of aircraft or system malfunction, including the braking system, which was tested and found to be operational. The pilot was the sole occupant and was uninjured. The accident occurred during a solo training circuit after the student had demonstrated proficiency in supervised landings.