If you operate under Part 91, chances are you’ve come across Letters of Authorization (LOAs), whether you’re expanding your fleet, adding new capabilities, or preparing to fly into airspace with specific authorization requirements.

The LOA development and application process can seem daunting. With different authorizations applying to different operations, knowing which ones your operation may need isn’t always straightforward. This guide breaks down what LOAs are, common authorizations that may apply to you, and how you can avoid delays.

What is an FAA Letter of Authorization (LOA)?

A Letter of Authorization (LOA) in aviation is a formal document approved by the Federal Aviation Administration (FAA) for Part 91 operators authorizing them to engage in specific flight activity. For example, when an operator wishes to use data link when flying outside of the United States, they would need to apply for a Data Link Communications LOA – otherwise known as an LOA A056. Always check which LOAs are required when planning your trip, especially when flying abroad.

A Few Authorizations Worth Knowing

• LOA A056 — Data Link Communications (CPDLC / ADS-C)
  Authorization is required for operators who are equipped with and wish to use data link systems when operating in areas outside of the United States. Note that US Part 91 operators do NOT require LOA A056 should they only plan to use their data link systems in the Domestic US.
• LOA B046 — Reduced Vertical Separation Minimums (RVSM)
  For US operations, it is no longer necessary to submit an application for RVSM authorization as long as the operations aircraft is fitted with ADS-B installed in accordance with 14 CFR 91.227, the ADS-B equipment is transmitting sufficient data, all other equipment is operating within acceptable tolerances, and no other airspace to be flown specifically requires an LOA. However, as foreign and international airspace, including the rest of the North American continent (i.e., Mexico and Canada), do still require authorization, operators who intend to conduct ANY international operations should still apply for the RVSM LOA.
• LOA D095 — Use of the Master Minimum Equipment List (MMEL) as a Minimum Equipment List (MEL)
  This LOA authorizes use of the MMEL as a MEL. Please note that most international civil aviation authorities do not permit use of the MMEL as an MEL. If conducting any international operations, LOA D195 is highly recommended instead. See our MEL Guide for more information.

Our Recommendation

Consider applying for every LOA your aircraft is capable of supporting, even if you don’t need them immediately. FAA review can take time, and having the appropriate authorizations in place can help you avoid scrambling when an operational need arises.

Let us handle your LOAs.

Get in touch with our LOA experts and experience flying stress-free with your compliance fully taken care of.