09/20/10 AC A requirements maybe established by the design approval holder or by a data supplier covered under a production certificate provided the data supplier has access to the original documentation for the avionics. For example, FMS suppliers to an OEM may document compatibility with its own FMS without the direct involvement of the OEM. The requirements should be based upon the
original design documentation, supplemented as necessary to address the data quality characteristics. Typically, the data format accuracy and resolution
is specified in the original RTCA/DO-178B documentation, and the corresponding assurance level integrity requirements are specified in RTCA/DO-201A, RTCA/DO-272B, or RTCA/DO-276A.
The data accuracy, resolution and assurance level may need to be reexamined for small RNP values or other operations not addressed in RTCA/DO-201A.
Note: DQRs reviewed and approved in accordance with AC B,
RTCA, Inc.
document DOB, do not need to be re-approved by the FAA to comply with this AC. Any additional documentation for data quality, (e.g.,
assurance level, that does not affect the TC or STC approved design, but is developed
in support of this criteria, is supplementary information in support of the data supplier Type 2
LOA. This means no other certification activity is required for the airborne systems or equipment. Supplementary documentation changes maybe reflected in documents separate from the TC or STC design documentation, but should provide the necessary references to such documentation. The TC or STC design holder may incorporate supplementary documentation into the certification basis at the next opportunity.
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