Airworthy Prep

Airline Transport Pilot Airplane test code

AA.I.A.K9Preflight Preparation: Operation of Systems

Airline Transport Pilot Airplane test standard, area of operation I, task A

Written as aa.i.a.k9 or AA.I.A.K9 on your score report.

The FAA's wording

Avionics and communications–autopilot, flight director, Electronic Flight Instrument Systems (EFIS), Flight Management System (FMS), Electronic Flight Bag (EFB), Radar, Inertial Navigation Systems (INS), Global Navigation Satellite System (GNSS), Space-Based Augmentation System (SBAS), Ground-Based Augmentation System (GBAS), ground-based navigation systems and components, Automatic Dependent Surveillance – Broadcast (ADS-B) In and Out, Automatic Dependent Surveillance – Contract (ADS-C), traffic awareness/warning/avoidance systems, terrain awareness/ warning/alert systems, communication systems (e.g., data link, Ultra High Frequency (UHF)/Very High Frequency (VHF)/High Frequency (HF), satellite), Controller Pilot Data Link Communication (CPDLC), indicating devices, transponder, and emergency locator transmitter, Head Up-Display (HUD).

FAA-S-ACS-11A, Airline Transport Pilot and Type Rating for Airplane Category ACS (November 2023, effective May 31, 2024), I. Preflight Preparation, Task A. Operation of Systems

What it means

AA.I.A.K9 is a knowledge element in the Preflight Preparation area of operation of the Airline Transport Pilot Airplane test standard. A knowledge element is something the FAA expects you to know, and the written test asks questions on it.

AA
Airline Transport Pilot Airplane ACS
I
Area of operation I: Preflight Preparation
A
Task A: Operation of Systems
K9
Knowledge element 9

Seeing it on your score report

Your Airman Knowledge Test Report lists a code for each area where you missed a question. Seeing AA.I.A.K9 there means at least one of your wrong answers was on this element. If you are taking the practical test next, expect the examiner to ask about it. Retaking the written? Start with this code and the others on your report.

Sources: FAA-S-ACS-11A, Airline Transport Pilot and Type Rating for Airplane Category ACS (November 2023, effective May 31, 2024); FAA Airman Knowledge Testing Matrix (revised 9/25/26), p. 2.

Can be printed on 4 tests
  • Airline Transport Pilot Multiengine Airplane Canadian Conversion (ACM)
  • Airline Transport Pilot Single Engine Airplane Canadian Conversion (ASC)
  • Airline Transport Pilot Multiengine Airplane (ATM)
  • Airline Transport Pilot Single Engine Airplane (135) (ATS)

Got more than one code on your report?

Paste them all into the free study planner and it groups them by subject, most missed first.