What happened
On 24 February 2021, a Cessna 177RG, registered F-GAAC, was performing a cross-country flight from Amboise Dierre to Étampes Mondésir. The flight, operated by a private pilot and accompanied by one passenger, involved a low-altitude leg following the Loire river at approximately 650 to 700 feet.
At 14:16, the pilot noticed the engine began spluttering. Despite attempts at troubleshooting, including activating the electric fuel pump and switching fuel selectors, the engine continued to lose power. Due to the low altitude and reduced airspeed, the pilot had limited options and directed the aircraft toward a nearby field for an emergency landing.
Upon touchdown, the aircraft entered a ploughed field. The sudden deceleration caused by the change in soil surface led to the collapse of the nose gear. The pilot struck the sunshield, resulting in a superficial injury to his forehead, while the passenger remained unharmed.
The investigation
The BEA examined the aircraft's engine, fuel system, and the site of the accident. A bench test of the engine performed at the École Nationale de l’Aviation Civile (ENAC) found no malfunctions. Investigators noted that the mechanical fuel pump's supply line was slightly loose; while the manufacturer stated this could introduce air bubbles and cause power loss, it would not typically lead to a complete shutdown.
Analysis of the fuel confirmed that the AVGAS 100LL was uncontaminated and met all required specifications. The investigation also reviewed the pilot's flight profile, noting that the aircraft was flying at a low altitude and reduced speed, which significantly restricted the pilot's maneuvering options during the power loss.