Know Your Airplane

The POH is your airplane's authority

Definition

Everything in Module 3 built your understanding of how airplanes work. But you don't fly airplanes in general — you fly one specific airplane, and its Pilot's Operating Handbook (POH) or Airplane Flight Manual (AFM) is the authority on it. Two airplanes of the same model can differ in installed equipment, STCs, and weight and balance, so the numbers and procedures that matter are the ones in your book.

Explanation

Under 14 CFR 91.9 you must operate the airplane in compliance with its AFM, its markings, and its placards — the POH/AFM isn't a study aid, it's the legal source. For airplanes certificated after March 1979 the AFM is required and is specific to the serial number. Your job as pilot in command is to know where your limitations, procedures, and numbers live, and to defer to them over habit or memory.

Know your airplane	Why
Generic knowledge isn't enough	Two airplanes of the same model differ — installed equipment, STCs, weight & balance. Your POH is specific to your airplane.
The POH/AFM is the authority	Under 14 CFR 91.9 you operate per the AFM, its markings, and its placards. It's the legal source, not a suggestion.
Post-March-1979 airplanes	The AFM is required and specific to the serial number — the numbers in it are yours, not a website's.
Your job	Know where your limitations, procedures, and numbers live — and defer to them over habit or memory.

Why it matters

Generic knowledge keeps you conversational; your POH keeps you legal and alive. Every limit you honor and every emergency you handle traces back to knowing your specific airplane's book.

A DPE might ask

What document is the authority on your airplane's operation?
What does 14 CFR 91.9 require of you?

14 CFR 91.9 — Operate per the AFM, markings & placards

POH structure: the 9 sections

Definition

Most modern POHs follow the GAMA standardized format — nine sections in the same order in every book. Knowing which section holds what turns a frantic search into a glance: limitations in Section 2, emergency procedures in Section 3, normal procedures in Section 4, performance in Section 5, weight and balance in Section 6.

Explanation

The nine sections are: 1 General, 2 Limitations, 3 Emergency Procedures, 4 Normal Procedures, 5 Performance, 6 Weight & Balance / Equipment List, 7 Systems Descriptions, 8 Handling/Servicing/Maintenance, and 9 Supplements. Section 9 (supplements) is where STCs and optional equipment live — often where your airplane really differs from the generic model. Older, pre-GAMA handbooks may not follow this order, so confirm the layout of your book.

POH section	What lives there
1 General	Descriptive data, symbols, your airplane's basic dimensions and figures.
2 Limitations	The rules: airspeeds, powerplant, weight & CG, maneuvers, required equipment, placards.
3 Emergency Procedures	What to do when it's an immediate threat — including the memory items.
4 Normal Procedures	Checklists for each phase of flight.
5 Performance	Takeoff, climb, cruise, and landing numbers (charts).
6 Weight & Balance	The equipment list and how to load your airplane within limits.
7 Systems Descriptions	How your airplane's systems actually work — the depth of Module 3.
8 Handling & Servicing	Ground handling, servicing, and owner-permitted maintenance.
9 Supplements	STCs and optional equipment — often where the real differences hide.

Why it matters

In an abnormal situation you don't have time to leaf through the whole book. Knowing the section map is what lets you find the right procedure in seconds.

From the Right Seat

Tab your POH's Sections 2, 3, and 4. In the airplane, you want limitations, emergencies, and normal checklists under your thumb, not somewhere in a 200-page book.

A DPE might ask

What are the sections of your POH, and what's in each?
Where do you find your airplane's limitations? Its emergency procedures?

POH / GAMA format — The nine standardized sections

Limitations & placards

Definition

Section 2 limitations are operating rules, not suggestions. They cover airspeed limits and the arc markings on the airspeed indicator (Vne, Vno, Va, Vfe, Vs), powerplant limits, weight and CG limits, approved maneuvers, and the kinds-of-operation equipment list. The placards posted in the cockpit are part of this — and under 14 CFR 91.9 they're legally binding.

Explanation

Read the airspeed indicator like a set of rules: the green arc is the normal operating range, the white arc is the flap operating range, the yellow arc is a caution range for smooth air only, and the red line (Vne) is never-exceed. Powerplant markings work the same way. Honor the weight and CG envelope from Sections 2 and 6, and treat every placard as a limitation you're legally required to comply with.

Limitation	Where it's shown
Airspeeds	Airspeed-indicator arcs & marks (Vne red line, Vno green/yellow, Vfe white arc) plus POH §2.
Yellow (caution) arc	Smooth air only — stay out of it in turbulence, even below Vne.
Powerplant	RPM / manifold pressure, oil temp & pressure — gauge markings plus POH §2.
Weight & CG	Max weights and the CG envelope — POH §2 and §6.
Kinds of operation	The equipment required for day / night VFR / IFR — POH §2.
Placards	Posted in the cockpit and legally binding under 14 CFR 91.9.

Why it matters

Limitations are where 'I didn't know' becomes an accident or a violation. Reading your markings and honoring your placards is basic airmanship the DPE will probe.

Common error

A common mistake is treating the yellow (caution) arc as just 'fast but fine.' It isn't — the yellow arc is approved for smooth air only. In turbulence, keep the airspeed out of the yellow even though it's below Vne, because a sharp gust up there can overstress the airframe.

You're in turbulence and your airspeed is in the yellow arc, below Vne. You should:

A DPE might ask

What do the airspeed-indicator arcs and markings mean?
Are the placards in the cockpit legally binding? Why?

14 CFR 91.9 & POH §2 — Limitations, markings & placards

Normal, abnormal, emergency

Definition

Procedures come in three flavors. Normal procedures are the checklists you run when everything's working, phase by phase. Abnormal procedures handle something that's not right but not immediately life-threatening — a rough magneto, an alternator light. Emergency procedures handle an immediate threat — an engine fire, an engine failure.

Explanation

Emergency (and some abnormal) checklists separate memory items — the bold-face, immediate-action steps you perform from memory — from read-and-do items you accomplish with the checklist in hand. The discipline is: do the memory items right now to stabilize the situation, then pick up the checklist and confirm you've done them and complete the rest. Know which of your airplane's items are memory items before you ever need them.

Normal

Everything working
Checklists for each phase of flight
Read-and-do, unhurried

Abnormal

Not right, but not immediately life-threatening
A rough mag, an alternator light
Manage it, then decide

Emergency

An immediate threat
Engine fire, engine failure
Memory items now, then the checklist

Why it matters

Confusing an abnormal for an emergency (or fumbling for a checklist when you should be acting from memory) wastes the seconds that matter. Knowing the categories and your memory items is what makes your response fast and correct.

A DPE might ask

What's the difference between an abnormal and an emergency procedure?
What are memory items, and which of your airplane's procedures have them?

POH §3–4 & AFH — Normal, abnormal & emergency procedures

The abnormal mindset

Definition

When something goes wrong, the first job never changes: fly the airplane. Aviate, navigate, communicate — in that order. Only once the airplane is under control and going where you want do you work the problem: recognize what's happening, maintain aircraft control, analyze and identify it, and act (memory items, then the checklist), landing as conditions require.

Explanation

The killer in abnormal situations is fixation — going heads-down to troubleshoot while the airplane quietly descends into terrain, or talking on the radio before flying. Aviate first, always. Then navigate (know where you are and where you're going), then communicate (declare and get help if you need it). The recognize-control-analyze-act loop keeps you from skipping straight to a fix before you understand the problem. When in doubt, fly the airplane and land.

Figure coming soon diagram: poh.mindset

Why it matters

More than any single procedure, this priority is what keeps an abnormal from becoming a fatal accident. 'Fly the airplane first' is the reflex every emergency lesson is built on.

Common error

The classic, deadly error is going heads-down to troubleshoot — or reaching for the radio — while nobody is flying the airplane. A famous airliner crash happened because the whole crew fixated on a burned-out light bulb while the autopilot quietly let the airplane descend into the ground. Fly first, every time.

Something abnormal happens in flight. Your very first action is to:

Safety

Build the habit on every normal flight: when something demands attention, say 'fly the airplane' out loud first. Under real stress you'll fall back on the habit you practiced.

A DPE might ask

What's your first priority when something goes wrong?
Walk me through how you'd handle an abnormal — what order do you do things in?

AFH & PHAK ch. 2 (ADM) — Aviate-navigate-communicate; the abnormal response

This is your airplane

Definition

You've learned the controls, the engine, the fuel system, the electrical system, and the gear, brakes, cabin, and carbon-monoxide hazard. The capstone is to make all of it specific: stop knowing airplanes in general and start knowing yours. Know your limitations, your emergency memory items, what fails and what you're left with, and where every number lives.

Explanation

Pull the module together in your airplane's terms: your V-speeds and limitations (POH §2), your emergency memory items (§3), and what each failure leaves you with — an alternator failure means minutes on the battery, fuel starvation is different from exhaustion, carbon monoxide means heat off and vents open and land, a dead magneto still leaves you flying. Know where every number lives so you can find it fast. The best pilots are lifelong students of the specific airplane they're flying.

Know cold for your airplane	From
Your V-speeds & limitations	POH §2 — the numbers you fly by.
Your emergency memory items	POH §3 — the ones you do without reading.
What fails, what you're left with	Alternator → battery minutes (M3.4); fuel starvation vs exhaustion (M3.3); CO → heat off/vents/land (M3.5); a dead mag (M3.2).
Where every number lives	POH sections 2, 5, and 6 — limitations, performance, weight & balance.
The habit	Be a student of your specific airplane — the best pilots always are.

Why it matters

This is the whole point of Module 3: not trivia about airplanes, but fluent knowledge of the one you fly. That fluency is what a checkride — and a real emergency — actually tests.

A DPE might ask

Tell me about your airplane's systems and what you'd do if each one failed.
Where in the POH do you find your limitations, performance, and weight and balance?

POH & Module 3 synthesis — Know your specific airplane