Definition
An FAA Advisory Circular that provides operational guidance for flying RNAV (GPS) approaches with LPV (Localizer Performance with Vertical Guidance) and LP (Localizer Performance) lines of minima. It explains how these approaches are named, charted, and flown, and clarifies the equipment and authorization requirements pilots must meet to use them.
Plain English
It is an FAA guidance document that tells pilots and operators how to properly use the GPS-based approaches that give precision-like accuracy, including what gear you need and how the charts label them.
Context Anchor
Seen in instrument procedure naming discussions, especially where the FAA explains approach names such as LPV and LP.
Derivation
An Advisory Circular (AC) is a numbered FAA publication that gives non-regulatory guidance on how to comply with regulations. The '90' series covers air traffic and general operating rules. '90-107' is simply the 107th document in that series.
Why Pilots Care
If you fly RNAV (GPS) approaches to LPV or LP minima, this AC is the source document that explains what your equipment must be capable of and how the approach is meant to be flown. Knowing it exists helps you find authoritative answers when chart symbols or minima lines raise questions.
Intuition Check
Do not read AC here as alternating current or air conditioning. In this FAA citation, AC means Advisory Circular: an FAA guidance document.
Example Sentence 1
Before flying her first LPV approach, she reviewed AC 90-107 to confirm what her GPS receiver needed to be approved for.
Example Sentence 2
Pilots consult AC 90-107 to understand the latest FAA recommendations on the topic.