CS-FCD T3 Evaluation Process

CS FCD.425 defines the evaluation processes applicable to validate the Flight Crew Data (FCD). Six standard evaluations relying on the use of evaluation subjects are described. These evaluations are termed as “Ttests”, numbered T1 to T6. CS FCD.425 also defines the applicability of the T-test proportionally to the safety risk of the FCD project submitted for evaluation. FCD projects below the risk-threshold defined in CS FCD.425 may under certain conditions be completed by analysis without the involvement of test-subjects. CS FCD.425(g) specifically deals with the T3 evaluation process, to evaluate differences between base and candidate aircraft and to set training and checking requirements. The difference training level of the project is used as a risk threshold. CS FCD.425(g) specifies that a T3 is needed to validate training requirements for difference training levels C or D. Certain equipment may be fully identical on several aircraft types or variants from a pilot perspective: pilot interface, operational procedures and pilot perception of the equipment may be the same. If such equipment requires level C or D training, CS FCD.425(g) requires that a T3-test is performed for each aircraft type on which the equipment is installed in order to validate the FCD.