Part 107 Test Report Codes Explained

When you finish the Part 107 knowledge test, you get an Airman Knowledge Test Report. Besides your score, it lists a short code for every question you answered incorrectly, something like UA.V.B.K6a. According to the FAA's Remote Pilot ACS, those codes point to the exact knowledge element you missed. Decoded, they are the most precise study guide you will ever get.

What is on the Airman Knowledge Test Report?

The ACS says the report lists your name, the date of the test, the type of test, a unique test identification number, your score, and the ACS codes for the questions you answered incorrectly. The report does not show the questions themselves or your answers. It shows the topics.

Keep the original. If you passed, the report is what you use to apply for your certificate, and the ACS says a passing report is valid for 24 calendar months for that application. If you failed, you need it to retest. For tests taken on or after January 13, 2020, the ACS says you can reprint the report from the PSI testing site.

How do you read a code like UA.I.B.K10?

The ACS breaks every code into four parts. Its own example is UA.I.B.K10:

Some codes end in a lowercase letter, such as UA.II.A.K1b. That letter is a sub-element. In the ACS, UA.II.A.K1 is "General airspace", and K1a through K1e are Class B, C, D, E and G airspace in that order, so UA.II.A.K1b means a Class C question.

Which area and task does each code point to?

The Roman numeral tells you the area, and the letter after it tells you the task.

The areas are not weighted equally. Regulations and Operations together carry most of the test, which the exam mistakes post breaks down. A list of missed codes that clusters in Area I matters more than the same number of misses in Area IV.

Three common codes, decoded

• UA.V.B.K6a is Airport Operations, "sources for airport data", sub-element a: aeronautical charts. The FAA's own sample questions use it for chart questions: frequencies, obstacles, and latitude and longitude. Practice on real FAA figures before a retest. The sectional chart guide is the place to start.
• UA.III.B.K1a is density altitude, part of Effects of Weather on Performance. The density altitude post covers what the exam asks.
• UA.I.B.K16 is Operating Rules, "prior authorization required for operation in certain airspace". The FAA's sample question for it asks how you may fly in Class C airspace, and the answer is prior ATC authorization under 14 CFR §107.41.

Turn the code list into a retest plan

1. Group the codes by area and task. Three misses in UA.II.A and one in UA.IV.A tell you where the hours go.
2. Read each element, not the whole area. The code names a specific element, so study that element and its neighbors.
3. Answer questions on those elements until you stop missing them. Reading alone rarely fixes a chart or weather miss.
4. Wait out the retest period. Under 14 CFR §107.71, you may not retake the test for 14 calendar days after failing it. The ACS adds that you must bring the failed report to the testing center and that no instructor endorsement is needed.

The failed Part 107 post covers fees and scheduling for the retest, and the score guide explains what practice scores to aim for before you book again.

What this means for the exam

Codes are not tested, but reading them well changes how you prepare. Treat each code as a pointer to one element in the ACS, look it up, and practice that element on its own before you take another full practice exam.