Under a special FAR, Dassault Aviation received a two-year exemption from meeting upgraded flight-data-recorder rules applicable to Falcon 900s and 900EXs operated under Part 135. Dassault claims that it would be a “significant expense” to have to develop and retrofit a new flight-data acquisition unit the company said would be required to enable the resolution of all required FDR parameters. Updated FDRs were required to be in use by August 20. The FAA said the two-year exemption period will be used by the agency and Dassault to resolve the problems facing fully upgraded FDRs.