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What Must Be in Your Aviation Operations Manual: FAA Part 135 Requirements

What 14 CFR 135.21 expects from your manual set and how to maintain revision discipline.

Navlyt Editorial TeamNavlyt Editorial TeamNavlytPublished 2/2/2026Updated 3/5/20267 min read
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What Must Be in Your Aviation Operations Manual: FAA Part 135 Requirements

What is an operations manual in Part 135 context

Your General Operations Manual is the operating contract between leadership, crew, and regulator expectations. It defines how your operation controls risk, authority, and execution.

The goal is not document length. The goal is procedural clarity backed by records and training.

Required sections under 14 CFR 135.21

Manual sections generally cover organizational structure, operational control, dispatch and flight release procedures, training framework, emergency processes, and records controls. Supporting manuals should align and cross-reference where procedures split by function.

You can map each section to requirement IDs inside Navlyt Compliance to reduce interpretation drift across departments.

14 CFR 135.21

Common gaps operators miss

Frequent gaps include outdated role responsibilities, procedures that no longer match tools in use, and missing distribution acknowledgements. Another common issue is duplicating a policy in two manuals and updating only one copy.

A controlled source-of-truth and change log are essential.

Tip

Review manual text against actual workflow screenshots twice per year.

How often to update and approve revisions

Update frequency should reflect regulatory changes and operational changes. At minimum, run quarterly review checkpoints and immediate revisions after significant process or fleet changes.

Keep revision packages consistent: summary of changes, impacted sections, stakeholder approvals, and crew acknowledgement evidence.

Version control best practices

Use semantic revision numbering, immutable prior versions, and document ownership. Publish a revision index that allows inspectors to trace what changed and why.

If your team still manages revisions in email, this is usually the highest ROI area to modernize. Compare options in aviation compliance software comparison.

How Navlyt maps manual sections automatically

Navlyt ingests your manual set and links each section to relevant obligations so you can spot coverage gaps in minutes. It does not replace legal review; it accelerates operational control.

Explore AI mapping in Navlyt AI Product and start from the free-trial pricing page.

Navlyt tracks this automatically

Turn recurring compliance work into automated tasks and evidence trails.

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Key takeaways

  • Manual quality is measured by control and traceability, not page count.
  • 14 CFR 135.21 coverage should be explicit and reviewable.
  • Revision discipline and acknowledgement logs are major audit signals.
  • Use requirement mapping tools to reduce manual compliance blind spots.

Author

Navlyt Editorial Team

Navlyt Editorial Team

Navlyt

Written by the Navlyt team. Guides reference the specific regulations they discuss and are general information, not legal or regulatory advice — confirm requirements for your operation with your FSDO or compliance officer.

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