Deviation

Section 04: Certification Process Mechanics

Definition

A departure from a specified requirement, standard, procedure, or specification. In the certification context, a deviation may refer to a departure from the approved type design data (a production deviation), a departure from an agreed means of compliance or test procedure (a certification process deviation), or a departure from a prescribed regulatory requirement (a regulatory deviation). Each type of deviation has different implications and resolution pathways depending on the context and the authority's requirements.

Where This Shows Up

Deviations in the production context (where a manufactured article differs from the approved design) are handled through the manufacturer's quality system, which must include procedures for identifying, evaluating, and dispositioning deviations. Deviations in the certification context may require revised compliance data, design changes, or regulatory relief.

Primary Sources

14 CFR ยง 21.143 โ€” Quality system requirements for PC holdersFAA

FAA requirement for production quality systems to include deviation management.

Related Terms

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