Which statement best describes how to verify a suspect part against approved sources?

• A. Use only visual inspection to determine authenticity.
• B. Request the original purchase order and supplier documentation.
• C. Check part numbers, lot codes, supplier verification, and comparison with approved catalogs; verify against approved sources.
• D. Substitute with a known-good part if unsure.

Answer: (C)

Verifying a suspect part against approved sources requires confirming both identity and provenance by cross-checking multiple data points with official records. The best approach uses part numbers and lot codes to confirm the exact item, alongside supplier verification to ensure the source is authorized and reputable. Comparing the item with information in approved catalogs or databases provides an authoritative reference for what is acceptable, and verifying against those approved sources ties the part to documented standards and approvals. This combination minimizes the risk of counterfeit or misidentified parts by validating what the part is, where it came from, and that it aligns with approved specifications.

Relying only on visual inspection may miss subtle counterfeits, and while checking the original purchase order and supplier documentation helps, it does not by itself prove the part matches the approved specifications or that the supplier is properly authorized. Substituting with a known-good part without completing proper verification bypasses critical checks and can introduce parts that aren’t fully compatible or within approved configurations.

In short, a thorough verification against approved sources—covering identity, source, and official reference data—provides the most reliable assurance that the part is authentic and acceptable for use.