Reduction in engine power at take-off 

Between 2015 and 2019, in France, more than one in ten fatal accident involving small aeroplanes or fixed-wing microlights is due to a reduction in engine power at take-off. This study sets out the main characteristics of these accidents, as observed during the investigations carried out by the BEA.  It describes the probable or proven causes of the power losses as well as the reactions most frequently observed in these circumstances, and the resulting consequences. 

• Scope of the study  
  • Period: 2015 to 2019 
  • Aircraft category: light single-engine aeroplane, fixed-wing microlight 
  • Investigation authority: BEA 

• For more detailed information:  
  • Accident to the ROBIN DR400-180 registered F-GFXE on 28 July 2018 at Charleville-Mézières (investigation report, available in French only) 
  • Accident to the Tecnam P2002 registered F-HOAB on 16 July 2018 at Les Mureaux (investigation report, available in French only) 
  • Accident to the DR400-140B registered F-GBUP on 21 May 2015 at Saint-Laurent-Blangy (investigation report, available in French only) 
  • "Perte partielle de puissance au décollage” (Partial power loss during take-off)
    (FFA basic rule) 
  • Bulletin de sécurité des vols  (Flight safety bulletin)
    (FFPLUM, February 2020) 
  • Avoidable Accidents No. 3 - Managing partial power loss after takeoff in single-engine aircraft
    (ATSB  study) 

Towards the end of the 2000’s, the BEA observed that a number of public

air transport accidents or serious incidents were caused by a problem

relating to “aeroplane state awareness during go-around” (ASAGA). Other

events revealed inadequate management by the flight crew of the

relationship between pitch attitude and thrust, with go-around mode not

engaged, but with the aeroplane close to the ground and with the crew

attempting to climb.

Study concerning glider accidents over French territory between 1999 and 2001. A translation in German is also available.

The Robinson R 22 is a two-blade helicopter well-liked by flying clubs and individuals who find its performance good value for money. This has favoured the rise in the number of R 22s in France since its entry into service. The upsurge of R 22 accidents that occurred in 2000 highlighted the need to update the 1991 study. This new study concerns Robinson R 22 accidents that occurred between 1988 and 2001.

Study concerning the collisions that occurred over French territory between 1989 and 1999 and that involved at least one civil airplane.

1992-1999. Study concerning accidents that occurred during agricultural spraying flights on French territory between 1992 and 1999.

Many pilots use their aircraft in visual flight conditions for their personal and professional trips. The question must be asked, however, as to whether visual flying is best adapted for trips arranged on a long-standing basis for which the pressures and stakes are sometimes determining factors. This study analyses accidents where pilots were trying to reach their destination at all costs.