Aha Trivia Stuff Everyone Should Know

Study guides ¡ Stuff Every Commercial Pilot Should Know

Aha Trivia

Stuff Every Commercial Pilot Should Know: Training Guide

A structured study foundation for Commercial Pilot (Airplane), with lessons, official references, and knowledge checks.

Who this is for: This course is for airplane pilots preparing for commercial privileges. It connects Part 61 requirements, advanced aircraft knowledge, professional decision making and the standards tested on the CAX and commercial practical test.

Study aid, not authority. This is not an FAA-approved course, an instructor endorsement, a certificate, or a substitute for current regulations and official FAA publications.

This edition is a study foundation. It does not claim to be a complete ground school. Work with a qualified instructor and use the current Airman Certification Standards.

Adapted from Open Checklists. Source revision 4e33e7b, checked 2026-10-25.

â–ļ Practice in Aha Trivia About this deck

Course facts

Minimum certificate age
18 14 CFR 61.123(a)
Knowledge test
CAX: 100 questions, 150 minutes, 70% to pass FAA testing matrix
Part 61 flight time
250 hours for an airplane single-engine rating 14 CFR 61.129(a)
Pilot-in-command time
100 hours, including 50 hours in airplanes 14 CFR 61.129(a)(2)
Training
20 hours in the areas listed by 61.129(a)(3) 14 CFR 61.129(a)(3)

Tests and standards

CAX knowledge test

100 questions ¡ 150 minutes ¡ 70% passing score

  • An authorized instructor or approved course must endorse your preparation.
  • Commercial questions expect private-pilot fundamentals plus deeper performance, systems and regulation judgment.
  • Use current charts and the FAA testing supplement when practicing calculations.

Official references: FAA testing matrix; 14 CFR 61.35

Practical test

Commercial Pilot Airplane ACS (FAA-S-ACS-7)

  • The examiner evaluates knowledge, risk management and flight skills by ACS task.
  • Commercial maneuvers demand coordinated control, accurate energy management and sound judgment, not memorized control movements alone.

Requirements

  1. Be at least 18 years old, meet the English requirement and hold at least a private pilot certificate. 14 CFR 61.123
  2. Receive and log the aeronautical knowledge and flight training required by 61.125 and 61.127. 14 CFR 61.125
  3. For an airplane single-engine rating under Part 61, log at least 250 hours with the categories of experience in 61.129(a). 14 CFR 61.129(a)
  4. Complete the required instrument, complex or technically advanced airplane, cross-country, night and practical-test preparation experience. 14 CFR 61.129(a)(3)-(4)

Study plan

  1. Week 1: Learn commercial privileges, limitations and experience requirements.
    Lessons: Commercial privileges, limitations and certification, Aeronautical experience and logbook audit
  2. Week 2: Deepen aerodynamic, systems and high-performance airplane knowledge.
    Lessons: Advanced aerodynamics and energy management, Aircraft systems and advanced equipment
  3. Week 3: Master performance calculations and commercial weather decisions.
    Lessons: Performance, weight and balance, Weather for commercial operations
  4. Week 4: Plan commercial-standard flights and prepare for maneuvers, risk scenarios and the Aha review game.
    Lessons: Navigation, flight planning and operating rules, Commercial maneuvers, risk and professionalism

Lesson 1 of 8

Commercial privileges, limitations and certification

Understand what a commercial certificate permits and which operations need separate authority.

What you will learn

  • Explain commercial pilot privileges.
  • Distinguish pilot certification from operator certification.
  • Apply eligibility and medical rules.

Certificate privileges

A commercial pilot may act as pilot in command for compensation or hire when qualified for the aircraft and operation. Section 61.133 also lists limitations.

The pilot certificate is only one part of legality. Common carriage or other commercial operations may require an operating certificate under Parts 119, 121 or 135, while specified operations may qualify for an exception.

Eligibility and responsibility

Section 61.123 requires age 18, English proficiency, an underlying pilot certificate, training, endorsements and successful knowledge and practical tests.

Commercial standards demand accurate records, legal compliance and conservative decisions. Compensation never removes the pilot in command's responsibility under Part 91.

Numbers to remember

ItemValueSource
Minimum age1814 CFR 61.123(a)
Flight reviewWithin preceding 24 calendar months14 CFR 61.56(c)

Knowledge check

Choose an answer before reading the answer key.

  1. What is the minimum age for a commercial pilot certificate?

    1. 17
    2. 18
    3. 21

  2. Does a commercial pilot certificate alone authorize all common-carriage operations?

    1. Yes
    2. No, separate operator authority may be required
    3. Only in single-engine airplanes

  3. Who remains responsible for determining that an aircraft is safe for flight?

    1. The dispatcher in every operation
    2. The pilot in command
    3. The passenger paying for the flight

Answer key

  1. B. 18. Section 61.123(a) sets the minimum age at 18. 14 CFR 61.123(a)
  2. B. No, separate operator authority may be required. The pilot certificate grants pilot privileges, while Parts 119, 121 and 135 govern many commercial operators and operations. 14 CFR 119.1
  3. B. The pilot in command. Section 91.7 assigns the airworthiness determination to the pilot in command. 14 CFR 91.7

Official reading

Lesson 2 of 8

Aeronautical experience and logbook audit

Turn the detailed requirements of 61.129 into a checkable training record.

What you will learn

  • Break down the 250-hour requirement.
  • Identify required training events.
  • Audit logbook entries before the checkride.

Time categories

For commercial airplane single-engine privileges under Part 61, section 61.129(a) requires 250 total hours, including 100 hours in powered aircraft and 50 in airplanes, plus 100 hours as pilot in command including 50 in airplanes and 50 cross-country.

The categories overlap. A flight may count toward more than one requirement when it genuinely meets each definition, but the same hour cannot become two hours of total time.

Required training and flights

The 20 hours of training include instrument training, training in a complex airplane, turbine airplane or technically advanced airplane, day and night cross-country training, and recent practical-test preparation.

The required solo time, or duties of pilot in command with an instructor, includes the long cross-country and night takeoffs and landings specified in the rule. Read the exact wording before planning flights.

Numbers to remember

ItemValueSource
Total time250 hours14 CFR 61.129(a)
Pilot in command100 hours; 50 in airplanes14 CFR 61.129(a)(2)
Training20 hours14 CFR 61.129(a)(3)
Solo or duties of PIC10 hours14 CFR 61.129(a)(4)

Knowledge check

Choose an answer before reading the answer key.

  1. What total flight time does 61.129(a) require for this Part 61 rating?

    1. 150 hours
    2. 200 hours
    3. 250 hours

  2. How much pilot-in-command time is required?

    1. 50 hours
    2. 100 hours
    3. 150 hours

  3. Can one qualifying flight satisfy more than one experience category?

    1. Never
    2. Yes, if it independently meets each category
    3. Only with examiner approval

Answer key

  1. C. 250 hours. The commercial airplane single-engine requirement in 61.129(a) starts at 250 hours. 14 CFR 61.129(a)
  2. B. 100 hours. Section 61.129(a)(2) requires 100 hours as pilot in command, including specified airplane and cross-country time. 14 CFR 61.129(a)(2)
  3. B. Yes, if it independently meets each category. Experience categories can overlap when the flight meets each rule, but total time is still the actual time flown. 14 CFR 61.129

Official reading

Lesson 3 of 8

Advanced aerodynamics and energy management

Apply load factor, stability, lift and drag concepts at commercial maneuver standards.

What you will learn

  • Relate load factor to stall speed.
  • Explain stability and control.
  • Manage energy through commercial maneuvers.

Loads and stalls

A level turn needs more lift as bank angle increases, so load factor and stall speed rise. An accelerated stall can occur at any attitude and airspeed when the critical angle of attack is exceeded.

Weight, center of gravity, contamination and configuration change performance and handling. An aft center of gravity reduces longitudinal stability and can make stall and spin recovery more difficult.

Energy and maneuvering

Commercial maneuvers reveal how well a pilot manages altitude, airspeed, bank, coordination and changing energy. Look outside, clear the area and use references without abandoning the instrument cross-check.

Pivotal altitude varies with groundspeed squared. Wind changes groundspeed around a ground-reference maneuver, so altitude and geometry require active correction.

Numbers to remember

ItemValueSource
Level 60-degree bank load factor2 GFAA Pilot's Handbook of Aeronautical Knowledge
Critical angle of attackThe stall occurs when it is exceeded, regardless of airspeedFAA Pilot's Handbook of Aeronautical Knowledge

Knowledge check

Choose an answer before reading the answer key.

  1. What happens to stall speed as load factor increases?

    1. It decreases
    2. It stays fixed
    3. It increases

  2. What is the approximate load factor in a level 60-degree bank?

    1. 1 G
    2. 2 G
    3. 4 G

  3. How does an aft center of gravity generally affect stability?

    1. Increases longitudinal stability
    2. Reduces longitudinal stability
    3. Has no effect

Answer key

  1. C. It increases. A higher load factor requires more lift and raises the speed at which the critical angle of attack is reached. FAA Pilot's Handbook of Aeronautical Knowledge
  2. B. 2 G. A coordinated level 60-degree bank produces about 2 G. FAA Pilot's Handbook of Aeronautical Knowledge
  3. B. Reduces longitudinal stability. An aft center of gravity shortens the effective stabilizing arm and reduces longitudinal stability. FAA Pilot's Handbook of Aeronautical Knowledge

Official reading

Lesson 4 of 8

Aircraft systems and advanced equipment

Diagnose system behavior in complex, high-performance and technically advanced airplanes.

What you will learn

  • Explain propeller and landing-gear systems.
  • Manage high-performance engine limits.
  • Use automation without losing situational awareness.

Engines, propellers and gear

A constant-speed propeller governor changes blade angle to maintain selected rpm within its operating range. Power changes require the sequence recommended by the aircraft manufacturer.

Retractable landing gear uses electrical or hydraulic components, position indications, warning systems and an emergency-extension method. Know the exact checklist for the airplane.

Technically advanced airplanes

Section 61.129(j) defines the required electronic primary flight display, multifunction display with moving map and integrated two-axis autopilot for the technically advanced airplane option.

Automation changes workload rather than eliminating it. Verify modes, targets and navigation sources, then remain ready to reduce automation when it creates confusion.

Numbers to remember

ItemValueSource
High-performance airplaneEngine of more than 200 horsepower14 CFR 61.31(f)
Complex airplaneRetractable gear, flaps and controllable-pitch propeller, including FADEC equivalents14 CFR 61.1

Knowledge check

Choose an answer before reading the answer key.

  1. What engine power makes an airplane high performance under 61.31?

    1. 200 horsepower or more
    2. More than 200 horsepower
    3. More than 180 horsepower

  2. Which feature is required for the technically advanced airplane option?

    1. A two-axis integrated autopilot
    2. Retractable landing gear
    3. A turbine engine

  3. What should a pilot verify after every automation change?

    1. Only the screen brightness
    2. Active and armed modes and targets
    3. Passenger seat position

Answer key

  1. B. More than 200 horsepower. The regulatory definition is an airplane with an engine of more than 200 horsepower. 14 CFR 61.31(f)
  2. A. A two-axis integrated autopilot. Section 61.129(j) includes an integrated two-axis autopilot among the required systems. 14 CFR 61.129(j)
  3. B. Active and armed modes and targets. Mode awareness prevents the aircraft from following a different path or target than the pilot expects. FAA Risk Management Handbook

Official reading

Lesson 5 of 8

Performance, weight and balance

Calculate whether the airplane can safely meet runway, climb, range and loading demands.

What you will learn

  • Use approved performance data.
  • Compute loading and center of gravity.
  • Explain density-altitude effects.

Performance planning

Use the aircraft flight manual or pilot's operating handbook for takeoff, climb, cruise and landing planning. Apply every stated condition, correction and limitation.

High density altitude reduces engine power, propeller thrust and wing performance. It increases takeoff distance, reduces climb rate and can turn a familiar runway into an unacceptable plan.

Loading

Compute each moment from weight and arm, total the weights and moments, and verify both weight and center of gravity for takeoff and landing.

Loading within a published envelope does not guarantee adequate runway or climb performance. Weight-and-balance legality and performance suitability are separate decisions.

Numbers to remember

ItemValueSource
MomentWeight multiplied by armFAA Weight and Balance Handbook
Center of gravityTotal moment divided by total weightFAA Weight and Balance Handbook

Knowledge check

Choose an answer before reading the answer key.

  1. How is a loading moment calculated?

    1. Weight divided by arm
    2. Weight multiplied by arm
    3. Arm divided by weight

  2. What usually happens to takeoff distance as density altitude rises?

    1. It decreases
    2. It stays constant
    3. It increases

  3. Does loading inside the center-of-gravity envelope prove runway performance is adequate?

    1. Yes
    2. No
    3. Only at sea level

Answer key

  1. B. Weight multiplied by arm. Moment equals weight multiplied by its arm from the datum. FAA Weight and Balance Handbook
  2. C. It increases. Reduced air density lowers engine, propeller and wing performance, increasing the takeoff distance. FAA Pilot's Handbook of Aeronautical Knowledge
  3. B. No. Loading and performance are separate calculations, and both must support the flight. FAA Pilot's Handbook of Aeronautical Knowledge

Official reading

Lesson 6 of 8

Weather for commercial operations

Read the whole weather system and make decisions that protect passengers, schedule and aircraft.

What you will learn

  • Integrate observations, forecasts and advisories.
  • Recognize high-risk weather.
  • Build operational escape plans.

Weather analysis

Start with the large-scale pattern, then connect fronts, pressure, moisture and stability to local observations and forecasts. Compare issue and valid times with each flight phase.

Commercial pressure can turn a marginal trend into a continuation bias. Define ceiling, visibility, wind, convective and icing limits before accepting a trip.

Hazards and decisions

Thunderstorms can produce turbulence, hail, lightning, icing, wind shear and tornadoes. Avoid severe or embedded cells with generous margins.

Mountain waves, low-level wind shear, freezing precipitation and rapidly lowering ceilings deserve explicit alternate or cancellation decisions, not vague monitoring.

Numbers to remember

ItemValueSource
Standard sea-level pressure29.92 inches HgFAA Aviation Weather Handbook
Standard temperature lapse rateAbout 2 degrees C per 1,000 feetFAA Aviation Weather Handbook

Knowledge check

Choose an answer before reading the answer key.

  1. What is the best starting point for a weather briefing?

    1. One airport observation
    2. The large-scale weather pattern
    3. Only the destination wind

  2. Which hazard can occur near thunderstorms even outside visible rain?

    1. Severe turbulence
    2. Guaranteed smooth air
    3. Lower density altitude

  3. Why set weather limits before a commercial trip?

    1. To avoid schedule-driven rationalization
    2. To replace federal rules
    3. To guarantee the forecast

Answer key

  1. B. The large-scale weather pattern. The broad pattern explains how local weather developed and how it may change along the route. FAA Aviation Weather Handbook
  2. A. Severe turbulence. Thunderstorm outflows and turbulence can extend beyond the visible cell. FAA Aviation Weather Handbook
  3. A. To avoid schedule-driven rationalization. Predetermined limits reduce pressure to reinterpret deteriorating conditions after passengers and schedules are involved. FAA Risk Management Handbook

Official reading

Lesson 7 of 8

Navigation, flight planning and operating rules

Build a legal route, fuel plan and operational briefing for a commercial-standard flight.

What you will learn

  • Plan route, altitude, time and fuel.
  • Apply airspace and airport rules.
  • Manage diversions and passenger needs.

Flight planning

Section 91.103 requires all available information, including weather, fuel, alternatives and known delays. Use current charts, aircraft data and notices.

Calculate headings, groundspeed, time and fuel by leg. Add realistic taxi, climb, reserve and contingency fuel rather than treating the regulatory reserve as a target landing quantity.

Operational control

Confirm airspace permissions, equipment, runway suitability, airport hours and services. A commercial pilot should brief passengers without allowing passenger urgency to control safety decisions.

Track actual groundspeed and fuel against the plan. Divert while good options remain, then update weather and airport information for the new destination.

Numbers to remember

ItemValueSource
VFR fuel reserve, day30 minutes14 CFR 91.151
VFR fuel reserve, night45 minutes14 CFR 91.151
Preflight informationAll available information concerning the flight14 CFR 91.103

Knowledge check

Choose an answer before reading the answer key.

  1. What does 91.103 require before flight?

    1. Only the destination forecast
    2. All available information concerning the flight
    3. Only fuel price and runway length

  2. What is the airplane night VFR fuel reserve?

    1. 20 minutes
    2. 30 minutes
    3. 45 minutes

  3. When is the best time to divert?

    1. While several safe options remain
    2. After the reserve is gone
    3. Only after passengers agree

Answer key

  1. B. All available information concerning the flight. The rule requires the pilot in command to become familiar with all available information concerning that flight. 14 CFR 91.103
  2. C. 45 minutes. Section 91.151 requires 45 minutes at normal cruising speed for night VFR. 14 CFR 91.151
  3. A. While several safe options remain. An early diversion preserves fuel, daylight, weather and airport choices. FAA Risk Management Handbook

Official reading

Lesson 8 of 8

Commercial maneuvers, risk and professionalism

Prepare for the practical test while building habits suitable for paid flying.

What you will learn

  • Explain the purpose of commercial maneuvers.
  • Use structured risk management.
  • Set professional passenger and maintenance boundaries.

Maneuver preparation

Use the current ACS to understand the objective, references, knowledge, risk elements and skill tolerances for each task. Practice with an instructor rather than reducing a maneuver to a memorized script.

Clear the area, select safe altitudes and references, manage configuration and announce a recovery plan. Stop a maneuver when traffic, weather, altitude or aircraft condition makes it unsafe.

Professional conduct

Use checklists, record discrepancies clearly and reject pressure to fly an unairworthy or unsuitable aircraft. Explain changes and cancellations to passengers in plain language.

The PAVE and 3P models help identify hazards, process their risk and perform controls. Reassess whenever the plan, aircraft, environment or pilot condition changes.

Numbers to remember

ItemValueSource
Commercial ACSKnowledge, risk management and skill are evaluated togetherFAA-S-ACS-7
Recent passenger experience3 takeoffs and landings within preceding 90 days14 CFR 61.57

Knowledge check

Choose an answer before reading the answer key.

  1. What does the Commercial Pilot ACS evaluate in each applicable task?

    1. Skill only
    2. Knowledge, risk management and skill
    3. Aircraft ownership

  2. What should a pilot do when conditions make a practice maneuver unsafe?

    1. Continue to preserve the schedule
    2. Stop or modify the maneuver
    3. Reduce the clearing turns

  3. What does PAVE organize?

    1. Pilot, aircraft, environment and external pressures
    2. Power, avionics, visibility and engine
    3. Passengers, airspeed, vectors and elevation

Answer key

  1. B. Knowledge, risk management and skill. The ACS integrates knowledge, risk management and flight skill instead of treating them as separate goals. Commercial Pilot Airplane ACS
  2. B. Stop or modify the maneuver. Risk management takes priority over completing a planned maneuver. Commercial Pilot Airplane ACS
  3. A. Pilot, aircraft, environment and external pressures. PAVE is a structured check of pilot, aircraft, environment and external pressures. FAA Risk Management Handbook

Official reading

Test-day checklist

  • ☐ Bring acceptable identification and the required endorsement.
  • ☐ Use the FAA testing supplement and check every chart unit before calculating.
  • ☐ Separate what a certificate permits from what an operating rule or operator certificate permits.
  • ☐ Keep the Airman Knowledge Test Report for your instructor and examiner.

After the knowledge test

  • Review each missed ACS code with your instructor.
  • Audit your logbook against every line of 61.129 before scheduling the practical test.
  • Practice commercial maneuvers in realistic scenarios with clear risk controls.
  • Use the current Commercial Pilot Airplane ACS for oral and flight preparation.

Sources and attribution

Adapted from Open Checklists at source revision 4e33e7bb93ae3ff0b722518256063523166d6b57. Source material was checked 2026-10-25. Aha Trivia created a new semantic and print layout, removed Open Checklists-only navigation, retained the instructional wording, and corrected citations and current test times after source verification.

Reused in Aha Trivia at the project owner's direction. Open Checklists does not publish a blanket license for these course files. Official FAA and eCFR materials remain subject to their own terms.

Practice what you learned

Aha Trivia turns the subject into short, scored questions. The guide and game are study tools, not official training or certification.

â–ļ Play Stuff Every Commercial Pilot Should Know Find another deck