DR400 series - Engine Air Filter P/N 56-23-02-000 SIB 2010-34

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On 3 July 2010 an accident occurred involving a DR400/160, causing serious injuries to the four occupants.

The French accident investigation body “Bureau d’Enquetes et d’Analyses” (BEA) has examined the wreckage and has determined that the engine air filter had been incorrectly installed in its holder.

Engine tests have been carried out on an aircraft of the same type fitted with an identical air supply system, with the air filter installed upside down. In such a configuration, the air filter completely blocks the air intake box and causes, upon starting the engine, the carburetor heat opening, resulting in the loss of at least 150 engine Revolutions per Minute (RPM) at full throttle.

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