Aircraft flight controls and operation of systems

The candidate teaches the systems of the airplane they will instruct in, from that airplane's own approved material, and can teach a student what to do when a system misbehaves.

Element 8 is the method. Most candidates teach systems as plumbing diagrams. A student needs to know what it looks like when it breaks and what to do, and the schematic is only there to make the indication make sense.

Element 7 is what the ACS actually emphasizes and it is what an examiner asks about.

This is taught whether or not the airplane you instruct in has one. That is the FAA's recommendation, read live on 2026-08-14 from the FAA-H-8083-15B Addendum of April 2015: pilot schools should incorporate training on angle of attack indicators in their syllabi whether their training aircraft are equipped with them or not, and instructors should get training on them from somebody knowledgeable before instructing in an equipped airplane.

It is guidance, not regulation (US-3.4), and the candidate must be able to say which it is. It is in this program because the reasoning holds regardless of who published it, and because a candidate who first meets an AOA indicator in a Student's airplane will teach it badly.

A note on the citation, so nobody thinks it is a typo. The FAA published this AOA material as an addendum to the Instrument Flying Handbook. It is not instrument content and it does not belong only to instrument flying. That is simply where the FAA put it. See sources/FAA-SOURCES.md.

What to teach, and it is four things

1. What it measures. The angle between the wing and the oncoming air, presented as a margin to the critical angle of attack. Stall margin, shown continuously, rather than inferred.
2. Why airspeed alone is not enough. The published stall speed holds in unaccelerated flight, in coordinated flight, at one weight. Outside those conditions it is not the number the wing is using. An airplane can stall at any airspeed.
3. What does not change it. For a given configuration the wing always stalls at the same angle of attack, and that critical angle does not move with weight, bank angle, temperature, density altitude, or centre of gravity. This is the sentence a Student remembers.
4. What limits it. Calibration, an unheated probe or vane, the type of indicator, flap setting, and wing contamination. The limitations belong to the installation, and the candidate goes to that airplane's own approved material and the manufacturer for them, per cross-cutting requirement 5.

The trap to teach against. An AOA indicator is an awareness instrument, not a permission slip. A Student who learns to fly the indicator instead of the airplane has swapped one number for another, and the device's own limitations are exactly the conditions in which they would most want to trust it.

Where this goes next. Lessons 30, 32, and 33 use it: slow flight is where a margin becomes visible, and the accelerated stall is the demonstration that proves point 2 above.

Critique runs inside the final block.

Instructor: the flight manual for the airplane the candidate will instruct in. FAA-H-8083-25C. FAA-S-ACS-25 at AI.II.E. Access to the airplane if possible.

Candidate: preparation deliverable, that airplane's flight manual.

Taught Ground Lesson: yes Meeting title convention: CFI Ground Lesson - L14 Systems - <YYYY-MM-DD> Participants: each on their own device, headset, Workspace account Candidate reads their own Session Transcript before the instructor's review Coverage maps to: AI.II.E Fallback if capture fails: instructor attests from contemporaneous notes; the lesson is not lost and is not re-taught for the sake of a recording

1. Teach from the flight manual for the actual airplane. Not a generic systems chapter.
2. On element 7, give an indication and ask what it means, rather than describing a failure.
3. Simulated Student role. A student who asks "but what would I actually see?" every time a schematic appears.
4. Assign the system for element 9 at the start of the lesson.
5. Critique against standards/CRITIQUE-STANDARD.md.

1. Arrive with the deliverable.
2. Teach an assigned system for about ten minutes.
3. State, for that system, what a failure looks like from the cockpit and what the student does.
4. Self-critique first.

Identical wording in the study guide.

1. The candidate teaches an assigned system to the Simulated Student for about ten minutes, working from the actual airplane's approved material.
2. The candidate states what a failure of that system looks like from the pilot's seat, in terms of indications rather than causes.
3. The candidate states the action a student should take for that failure, and where the student would find it.
4. The candidate directs the Simulated Student to the flight manual rather than quoting a number from memory.
5. The candidate teaches indication before mechanism, or explains why mechanism came first.
6. The candidate states what an angle of attack indicator measures and two of its limitations, and says whether the airplane they instruct in has one, and can say that the FAA's guidance to teach this is guidance rather than regulation.
7. The candidate delivers a self-critique before hearing the instructor's.

| Teaching an angle of attack indicator as a device that prevents a stall | Element 10. It is awareness, not a permission slip, and its limitations bite in the conditions that matter |

| Quoting AOA limitations generally rather than for the installation | Element 10, requirement 5. Calibration and probe heating are installation properties |

Not applicable. Ground lesson.

Verbatim in the study guide.

Read:

• FAA-S-ACS-25, Area of Operation II, Task E.
• The flight manual for the airplane you will instruct in. The systems section, all of it.
• FAA-H-8083-25C, the systems chapter, plus the October 2025 addendum.
• FAA-H-8083-15B Addendum, April 2015, on angle of attack indicators. Four pages. Yes, it is an addendum to the Instrument Flying Handbook; that is where the FAA put it.
• Find out whether the airplane you instruct in has an angle of attack indicator. If it does, bring its limitations from that airplane's own approved material. If it does not, say so.

Deliverable: Pick one system in the airplane you will instruct in. On one page, write: what it does, what a failure looks like from the seat, what the pilot does, and where in the flight manual the student would find that. Do not copy any number out of the manual. Cite where it is instead.

Second deliverable. Write the ground lesson you would teach on aircraft flight controls and the operation of systems, to the template in standards/LESSON-PLAN-TEMPLATE.md, in your own words. This is one of your seventeen P3 plans, covering the systems, performance, or weight and balance cluster. Bring it on paper.

You have already written most of this. Turn your one-page system write-up into a lesson plan: same content, arranged so that somebody else could teach from it.

Needed and not yet available: a real North Aero systems failure, with what the student saw and what they did. Owner: Erick. Until supplied, use a failure the instructor has personally had, and say that is what it is.

None. This lesson teaches no maneuver.

This lesson is complete and deliverable whether or not its Video Slots are filled. It has none.

Grade whether a student could act on it. Systems knowledge that cannot be converted into an action is trivia with a diagram.

Tracker Status set by the instructor, named, dated.

• ✓Traces to a story. US-4.1, US-4.2
• ✓Carries ACS tasks and Part 61 references
• ✓Completion standards are observable behavior, and the standard is a taught presentation
• ✓Common errors listed
• ✓Intervention threshold: not applicable, ground lesson, reason given
• ✓Student preparation named, in the student half
• ✓FAA references verified current, 2026-08-13
• ✓Passes the design system check
• ✓Appears in the program structure and coverage matrix, hours reconciling
• ✓Both halves exist
• ✓Video Slots: none, and the lesson says so
• ✓Angle of attack indicators taught, per the FAA-H-8083-15B Addendum of April 2015, and flagged as guidance rather than regulation (US-3.4)
• ✓Vocabulary matches CONTEXT.md
• ✓No em dashes, no reproduced POH performance numbers, no pricing
• ✓Points at the airplane's own approved material (US-4.2, requirement 5)
• ✓Carries the Epic 12 capture hooks