FAA-CT-8080-1E

Airman Knowledge Testing Supplement for Commercial Pilot (COMM Testing Supplement)

The Airman Knowledge Testing Supplement for Commercial Pilot (FAA-CT-8080-1E) contains the figures, charts, and reference materials available during the FAA Commercial Pilot knowledge test. It includes performance charts for complex aircraft, weight and balance problems, navigation charts, and weather reference materials specific to commercial pilot operations.

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Why This Document Matters

This supplement is used during the Commercial Pilot knowledge test and contains reference materials at a higher level of complexity than the Private Pilot supplement. Performance charts include complex and high-performance aircraft, weight and balance problems are more involved, and weather interpretation requires deeper analysis. Studying with this supplement is essential for CAX test preparation.

Study This Document in One Loop

What is the Study Loop?

A 30-60 minute scenario-first session that replaces hours of passive reading.

Stage 1

Scenario

Your Commercial written test is in 8 days. Practice scores hover at 78%, with consistent misses in (1) W&B for complex/high-perf aircraft, (2) performance charts with multiple correction factors, and (3) Commercial-specific regs (100-hour for hire, Part 119 carve-outs). You've been using Private-level material and wondering why you're stuck.

Stage 2

Decision

Which supplement sections do you drill? What's different about Commercial W&B vs. Private? Which performance chart entry trips you up most?

Write your answer before you open the handbook. That exposes the gap.

Stage 3

Targeted Learning

Open only these sections of the COMM Testing Supplement:

Section 1 — Complex/High-Performance Aircraft Performance Charts
Section 2 — Weight and Balance for Commercial operations (different envelope shapes)
Section 3 — Navigation and Weather Reference (overlap with private)
Cross-reference with Part 119 and Part 135 applicability (regs-focused)

Stage 4

Debrief

Compare your Decision to what the handbook says:

?Performance charts at commercial level often have 3-4 correction factors (temp, altitude, weight, wind). Entry sequence matters.
?Commercial W&B includes shifted-passenger and in-flight fuel-burn scenarios. Can you compute CG at mid-flight?
?100-hour inspection: required for aircraft used FOR HIRE. Commercial ops often trigger this where Private wouldn't.
?Part 119 and Part 135: know when a commercial pilot cert requires operator certification to do the work. Heavily tested.

Stage 5

Reinforcement

Turn your biggest miss into fast-recall rules:

Commercial chart entry: multiple correction factors, sequenced. Miss a step, miss the answer.
Commercial W&B problems often test fuel-burn CG shift during flight.
Commercial ≠ Part 135. Know which operations need operator certification (Part 119) vs. pilot certification alone.

What Order to Read the COMM Testing Supplement

Don't read by chapter number. Work the four phases. Start with whichever you're weakest in.

Survival Thinking

“What can hurt me?”

•Part 119/135 applicability (don't accidentally violate a certification structure)

Interpretation

“What am I looking at?”

•Complex performance charts with multiple correction factors

Prediction

“What will happen?”

•Fuel burn CG shift during flight

Checkride Mode

“Can I explain it under pressure?”

•CAX knowledge test pulls heavily from this. Practice timing to the supplement.

Chapter-by-Chapter Guide

What each section covers and the key topics to study

Performance Charts and Weight and Balance

Complex aircraft performance charts and advanced weight and balance calculations for the commercial test.

Key Topics

Complex aircraft performance chartsAdvanced weight and balance problemsDensity altitude calculationsTakeoff and landing performance

Navigation and Weather Reference

Navigation charts and weather products referenced in commercial pilot knowledge test questions.

Key Topics

Cross-country planning chartsAdvanced weather productsCommercial operations referencesRegulatory reference materials

Study Tips

Practice the performance chart problems until you can solve them quickly — the commercial knowledge test has tighter time pressure than the private test and the charts are more complex.
Master the weight and balance calculations including shift-of-CG problems and multi-step loading scenarios. These are common on the CAX test.
Cross-reference the supplement with your test prep questions to ensure you can find the correct figure quickly during the actual test.

Frequently Asked Questions

How is this different from the Private Pilot testing supplement?

The Commercial supplement includes more complex performance charts (multi-engine, high-performance aircraft), more involved weight and balance problems, and additional navigation and weather materials appropriate for commercial-level operations. The difficulty level is noticeably higher.

Do I need to study this supplement for the commercial checkride?

You need this supplement specifically for the FAA knowledge test (CAX). For the practical test (checkride), the DPE will use the Commercial ACS as the standard and may reference actual aircraft POH performance charts rather than the testing supplement figures.

Quick Facts

Document ID: FAA-CT-8080-1E
Last Updated: 2024
Cost: Free
Publisher: FAA

Applies To

Commercial

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