Partial FAI

Partial FAI commonly refers to a First Article Inspection that is intentionally limited in scope to selected characteristics, features, or operations rather than the entire part or assembly. It is used in regulated and aerospace manufacturing environments when only a portion of the design, process, or tooling has changed and a full, from-scratch FAI is not required by the applicable procedures.

What a Partial FAI Includes

A partial FAI typically focuses on:

• Characteristics directly affected by a design change, drawing revision, or engineering change notice
• Features impacted by changes to manufacturing methods, tooling, fixtures, material source, or key process parameters
• Operations moved to a new machine, line, or supplier that require verification of conformity
• Specific nonconforming dimensions or features that were previously corrected and now need re-verification

In this context, only the affected characteristics are re-ballooned, inspected, and documented, while unchanged characteristics from the baseline (previous full FAI) are referenced rather than re-inspected.

What a Partial FAI Does Not Include

A partial FAI does not normally include:

• Re-verification of every drawing characteristic from scratch
• Re-documentation of unchanged processes, materials, or suppliers, except as required by internal or customer procedures
• Replacement of the original full FAI record, which remains the baseline

Instead, it supplements the original FAI by documenting the specific changes and their verification results.

Operational Use in Manufacturing Systems

In MES, QMS, and digital inspection tools, a partial FAI may appear as:

• A follow-on FAI record linked to the original full FAI for the same part number or configuration
• An inspection plan that reuses the prior FAI ballooning but only activates a subset of characteristics for re-measurement
• A workflow triggered by a drawing or process change where the system flags only affected operations or features for FAI-level inspection

In aerospace contexts aligned with AS9102 practices, partial FAIs are often documented using the same core forms or data structures as a full FAI, but with clear identification that the submission is partial and which characteristics or sections are being updated.

Common Confusion

• Partial FAI vs. Full FAI: A full FAI covers all drawing requirements for a defined configuration of a part or assembly. A partial FAI covers only the characteristics affected by changes, with the original full FAI still serving as the baseline.
• Partial FAI vs. Routine Production Inspection: Routine inspections or in-process checks may sample features to control quality. A partial FAI is a formal, documented verification tied to a change event and typically controlled under customer or standard requirements, not just internal sampling plans.

Context in Regulated and Aerospace Environments

In aerospace and other highly regulated sectors, partial FAIs are often used to maintain traceability of design and process changes without repeating a full qualification of the part each time. Organizations typically define when a partial FAI is allowed, how it must reference the baseline FAI, and how to manage records so that auditors can trace which configuration each FAI (full or partial) applies to.