Insights for Part 21J teams

Tungsten Blog

Practical guidance for Part 21J design offices on certification workflows, document control, and compliance.
Document controlApproval workflowsAudit readiness

Featured article

Start with the latest practical guidance from the Tungsten team. Each piece is written for design offices that need cleaner approvals, clearer records, and less admin drag.
Latest post 18 May 2026By Tungsten

EASA Part 21J Audit Readiness: A Practical 10-Point Checklist for Design Offices

Audit readiness is not a one-week scramble. Use this 10-point Part 21J checklist to tighten traceability, approvals, and evidence control before your next authority review.

Why this blog exists

Less theory. More operational clarity.

The editorial focus is practical: what slows certification teams down, what causes avoidable rework, and what structured workflows change in real operations.

Coverage

3 published articles

Written for

Part 21J design offices

Focus

Compliance without admin sprawl

Archive

Browse the full library of guidance, analysis, and workflow notes for certification teams.
Archive15 May 2026

The Hidden Cost of Spreadsheet-Based Document Control in EASA Part 21J Design Offices

Most Part 21J design offices still manage certification documents with spreadsheets and shared drives. Here's what that's actually costing you — and why the switch to structured workflows pays for itself within weeks.

Archive9 May 2026

Why EASA Rejects Design Certifications: 7 Common Submission Errors and How to Avoid Them

Most EASA submission rejections are not engineering failures. They are documentation and traceability failures. Here are the seven most common causes and how Part 21J teams can prevent them.

© 2026 Altus Aeronautica Ltd. Built for aerospace engineers, by aerospace engineers.