SOCATA TB 9 Sustains Heavy Damage During Simulated Engine Failure Drill

Casualties unknown • Cascais, PT

A SOCATA TB 9 experienced a violent impact during a proficiency check flight at Cascais Municipal Aerodrome after a simulated engine failure led to an uncontrolled descent.

What happened

On March 4, 2003, a SOCATA TB 9 (registration CS-DAB) was conducting a proficiency check flight at the Aeródromo Municipal de Cascais. The flight was intended to evaluate the pilot's recent competency in the aircraft type as part of the Aero Clube de Portugal's requirements for maintaining flight proficiency.

Following a takeoff briefing, the pilot aligned with runway 17 and initiated takeoff using maximum power and landing flaps (30°). After reaching a rotation speed of 55 knots and climbing at 60 knots, the aircraft reached an altitude of approximately 380 feet AMSL. At this point, the flight checker, simulating an engine failure, abruptly reduced the engine power to idle.

In accordance with the aircraft's Operating Manual, the pilot attempted an emergency landing on the remaining runway by lowering the nose to accelerate to the recommended 70-knot glide speed. However, the aircraft's low airspeed and altitude prevented a sustainable glide. The aircraft struck the asphalt violently with the main landing gear, resulting in significant structural damage. There were no injuries to the two crew members or the passenger on board.

Probable cause

The primary cause of the incident was the failure to adhere to the manufacturer's recommended operating procedures by the flight checker. Specifically, the use of an incorrect takeoff flap configuration, takeoff and climb speeds that were below recommended limits, and the decision to simulate an engine failure before the aircraft had reached the minimum required airspeed for single-engine flight. These factors, combined with the checker's failure to intervene or increase power when the descent became unrecoverable, led to the aircraft entering a stall and impacting the ground.

Frequently asked questions

What happened in the 2003-03-04 Socata TB9 accident near Cascais, PT?

A SOCATA TB 9 experienced a violent impact during a proficiency check flight at Cascais Municipal Aerodrome after a simulated engine failure led to an uncontrolled descent.

What aircraft was involved and where did it happen?

The accident on 2003-03-04 involved a Socata TB9, registration CS-DAB, at Cascais, PT.

What was the probable cause of the accident?

The primary cause of the incident was the failure to adhere to the manufacturer's recommended operating procedures by the flight checker. Specifically, the use of an incorrect takeoff flap configuration, takeoff and climb speeds that were below recommended limits, and the decision to simulate an engine failure before…

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