ANNEX 14 VS AC 150/5340

At a Glance

One Standard, One Series

"AC 150/5340" Is Not One Standard

This is the single most important distinction for technical documentation. You should never write "complies with FAA AC 150/5340" as a standalone statement — the 150/5340 series contains several distinct documents, each covering a different subject.

Annex 14 Isn't the Whole ICAO Library Either

The reverse assumption is just as common — and just as wrong. For detailed AGL engineering, ICAO's own visual-aid guidance is spread across more than Annex 14 alone.

So the honest comparison is not "one Annex vs one AC" — it is closer to an ICAO document set vs an FAA AC/EB/equipment-specification set.

A Runway Edge Light, Two Ways

Take a single runway edge light. Each framework approaches the same fixture from a different direction.

Same Categories, Different Tables

Both frameworks specify intensity, colour, beam distribution and horizontal/vertical distribution — but the photometric tables and acceptance criteria are not interchangeable. Do not take an ICAO photometric table and assume it is automatically the FAA acceptance criterion, or vice versa.

PAPI: System-Level and Equipment-Level, Both Required

PAPI illustrates the split cleanly. Annex 14 sets the aerodrome-level operational requirement; the FAA framework then splits that requirement across a dedicated equipment AC and a separate installation AC.

A PAPI technical submittal built on the FAA framework therefore needs both a system-level and an equipment-level compliance reference — Annex 14 folds both into one document.

Bases & Isolation Transformers

This is particularly relevant to AGL BOQs. FAA carries separate equipment specifications for components such as light bases, transformer housings and junction boxes — AC 150/5345-42K covers bases, transformer housings, junction boxes, accessories and elevated-light fixture covers/stakes. Annex 14 treats the same items as part of the overall fixture and installation requirement.

This level of document separation is a major structural difference from simply referencing Annex 14, where all of the above sits inside one volume.

Same Objective, Different Home Document

Annex 14 includes requirements on secondary power supply and switch-over characteristics directly within the Annex, extending to matters such as switch-over times for airport lighting. In the FAA framework, the equivalent requirement is distributed across the applicable installation AC, equipment specifications and project requirements rather than sitting in one place. The exact transfer times, loads and categories must always be taken from the applicable runway category, lighting system and project standard.

Performance Provisions vs a Dedicated AC

Where LED Guidance Sits in Each Framework

FAA maintains Engineering Briefs alongside its AC system — EB 67 covers light sources other than incandescent and xenon for airport and obstruction lighting fixtures. Annex 14 addresses LED-related considerations within the Annex itself rather than through a separate document.

How the Two Document Sets Sit Together on a Project

On an actual project, the contract and applicable aviation authority determine which requirements are mandatory — the two document sets are consulted in parallel underneath that authority.

What a Technical Submittal Should Actually Look Like

Instead of writing "AGL system complies with ICAO and FAA," build a proper compliance matrix, referencing the exact document on each side for each item.

What vs How, Restated

This is a simplification — both document sets contain detailed technical provisions — but it is a useful engineering shorthand for keeping the two frameworks straight.

Myths vs Facts

How to Read the Two Frameworks

Engineering & Expert Notes

Frequently Asked Questions

Governing Documents

For an actual airport project, verify the current applicable editions of the relevant standards before using this comparison for project design.

Annex 14 = one international standard describing the required outcome. AC 150/5340 = a U.S. document family describing the implementation. Reference the exact document for each item — never a blanket "ICAO/FAA compliant" statement.

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