Pt. 60, App. A

14 CFR Ch. I (1-1-19 Edition)

quality of the match using flight-test data as
a reference.
(2) Good engineering judgment should be
applied to all tolerances in any test. A test
is failed when the results clearly fall outside
of the prescribed tolerance(s).
(3) Engineering simulator data are acceptable because the same simulation models
used to produce the reference data are also
used to test the flight training simulator
(i.e., the two sets of results should be  - essentially -  similar).
(4) The results from the two sources may
differ for the following reasons:
(a) Hardware (avionics units and flight
controls);
(b) Iteration rates;
(c) Execution order;
(d) Integration methods;
(e) Processor architecture;
(f) Digital drift, including:
(i) Interpolation methods;
(ii) Data handling differences; and
(iii) Auto-test trim tolerances.
(5) The tolerance limit between the reference data and the flight simulator results
is generally 40 percent of the corresponding
-flight-test- tolerances. However, there may
be cases where the simulator models used are
of higher fidelity, or the manner in which
they are cascaded in the integrated testing
loop have the effect of a higher fidelity, than
those supplied by the data provider. Under
these circumstances, it is possible that an
error greater than 40 percent may be generated. An error greater than 40 percent may
be acceptable if simulator sponsor can provide an adequate explanation.
(6) Guidelines are needed for the application of tolerances to engineering-simulatorgenerated validation data because:
(a) Flight-test data are often not available
due to technical reasons;
(b) Alternative technical solutions are
being advanced; and
(c) High costs.
12. VALIDATION DATA ROADMAP

kpayne on VMOFRWIN702 with $$_JOB

a. Airplane manufacturers or other data
suppliers should supply a validation data
roadmap (VDR) document as part of the data
package. A VDR document contains guid-

ance material from the airplane validation
data supplier recommending the best possible sources of data to be used as validation
data in the QTG. A VDR is of special value
when requesting interim qualification, qualification of simulators for airplanes certificated prior to 1992, and qualification of alternate engine or avionics fits. A sponsor seeking to have a device qualified in accordance
with the standards contained in this QPS appendix should submit a VDR to the NSPM as
early as possible in the planning stages. The
NSPM is the final authority to approve the
data to be used as validation material for the
QTG.
b. The VDR should identify (in matrix format) sources of data for all required tests. It
should also provide guidance regarding the
validity of these data for a specific engine
type, thrust rating configuration, and the revision levels of all avionics affecting airplane handling qualities and performance.
The VDR should include rationale or explanation in cases where data or parameters are
missing, engineering simulation data are to
be used, flight test methods require explanation, or there is any deviation from data
requirements. Additionally, the document
should refer to other appropriate sources of
validation data (e.g., sound and vibration
data documents).
c. The Sample Validation Data Roadmap
(VDR) for airplanes, shown in Table A2C, depicts a generic roadmap matrix identifying
sources of validation data for an abbreviated
list of tests. This document is merely a sample and does not provide actual data. A complete matrix should address all test conditions and provide actual data and data
sources.
d. Two examples of rationale pages are presented in Appendix F of the IATA  - Flight
Simulator Design and Performance Data Requirements. -  These illustrate the type of
airplane and avionics configuration information and descriptive engineering rationale
used to describe data anomalies or provide
an acceptable basis for using alternative
data for QTG validation requirements.
END INFORMATION
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