FAA AGI Advanced Ground Instructor common mistakes
FAA AGI Advanced Ground Instructor · Understand the traps and how to avoid them.
Assumes the ground instructor certificate carries flight instructor privileges and signs off things like a practical test recommendation, a flight review, an instrument proficiency check, or solo/Cross-country endorsements.
The two certificates are both called 'instructor' and candidates memorize only that a ground instructor 'can endorse for knowledge tests,' then generalize the authority to every endorsement they have seen a CFI sign.
What to do instead
Write out the privileges section for ground instructors (14 CFR 61.215) and the limits on flight instructor endorsements (61.195) side by side on one card, then list on the back the specific items a ground instructor may sign: ground training completion for a knowledge test, within the ratings held (basic, advanced, instrument). Test yourself by sorting ten sample endorsements into 'may sign' and 'may not sign.'
Computes only takeoff weight and takeoff CG, declares the airplane legal, and never checks maximum zero fuel weight, maximum landing weight, or the CG after fuel burn.
Training examples usually show a single loading problem with one answer, so the candidate treats weight and balance as one calculation instead of a set of independent limits that must all be satisfied.
What to do instead
Use a fixed four-row worksheet every time: empty aircraft, fuel, occupants, baggage. Total weight and total moment, divide for CG, then run four separate checks against the envelope: max ramp/takeoff weight, max zero fuel weight, max landing weight with the landing fuel load, and the most forward and most aft CG limits for the actual weight. State the limiting item out loud before selecting an answer.
Reads a TAF and reports a TEMPO or PROB30 group as if it were the prevailing forecast, or calls a scattered layer a ceiling, or mixes AGL and MSL heights in the same answer.
The groups are visually embedded in the same line of text, and candidates scan for the worst-looking conditions instead of parsing the change-group structure and the height reference in each element.
What to do instead
Decode every TAF in a fixed order: valid period, wind, visibility, weather, sky condition, then change groups, and write 'prevailing' and 'conditional' in two columns. Memorize that a ceiling is the lowest broken or overcast layer (or vertical visibility into an obscuration) and that TAF heights are AGL while METAR-reported ceilings in remarks are also AGL but chart altitudes are MSL.
Quotes Class B VFR weather minimums for Class C airspace, or states flatly that Class E always begins at 1,200 feet AGL without recognizing the 700-foot and surface-area depictions.
Airspace is studied as isolated memory facts (a list of visibility numbers) instead of as a three-dimensional structure, so the same numbers get attached to the wrong class.
What to do instead
Draw, from memory, a vertical column from the surface to 18,000 feet with each class and its VFR minimums, cloud clearances, and equipment requirements written inside, then redraw it weekly until it is exact. For Class E, mark the three bases (surface, 700 AGL, 1,200 AGL) and the sectional chart depiction (dashed magenta with fade, dashed magenta, faded blue).
Explains lift as 'air travels faster over the top so pressure is lower' and then cannot answer why a wing stalls at a critical angle of attack regardless of airspeed, weight, or bank angle.
The simplified pressure explanation is repeated so often that it becomes the whole mental model, leaving no mechanism that links angle of attack to the stall.
What to do instead
Rebuild the explanation around angle of attack and downward deflection of the airstream (with circulation as the mathematical description), then state the consequences: the stall occurs at a critical angle of attack at any speed and any weight, and accelerated stall speed scales as Vs(new) = Vs(1g) times the square root of load factor. Practice explaining one stall entry using only angle of attack language.
Misdiagnoses pitot-static failures, for example answering that a blocked static port drives the airspeed indicator to zero, or stating that the attitude indicator is powered by the pitot system.
Candidates memorize instrument names and normal indications but never trace where each instrument gets its pressure or power, so a failure scenario has no path to follow.
What to do instead
Draw a block diagram: pitot source to the airspeed indicator only; static source to airspeed, altimeter, and vertical speed; gyroscopic and electrical instruments on vacuum or electrical power. Then derive each failure from the diagram: blocked pitot with open drain makes the airspeed indicator behave like an altimeter; blocked static freezes the altimeter, makes the vertical speed read zero, and makes the airspeed overread in a climb and underread in a descent.
Produces a lesson plan that is a topic list with no measurable objective or completion standard, and answers scenario questions about the laws of learning or levels of learning by naming the term without applying it to the situation.
Candidates memorize the vocabulary of the fundamentals of instructing as definitions rather than as working tools, and have never actually written a measurable objective.
What to do instead
Use one template for every plan: objective written as condition, behavior, and standard; content outline; instructor actions and student activities; completion standards; and a short evaluation. Write three objectives for one maneuver at three levels (rote, understanding, application) and check each one contains a measurable verb and a numeric standard.
Applies variation and deviation in the wrong order or with the wrong sign, or plans trip fuel using cruise burn alone without taxi, climb, descent, or the required reserve.
The correction chain is memorized as a string of letters rather than as a physical sequence from chart to compass, and fuel planning is practiced only with simple cruise-only textbook problems.
What to do instead
Write the chain with directions: true course plus or minus variation gives magnetic course, plus or minus deviation gives magnetic heading, then wind correction applied to convert course to heading. For fuel, build a ladder with taxi, climb, cruise, descent, alternate, and reserve rows, and total it before checking against usable fuel.
Swaps the five hazardous attitudes with their antidotes, and confuses hypoxia with hyperventilation, giving the wrong corrective action for the symptoms described.
These are learned as two parallel lists of five and two items respectively, without a scenario attached, so recall collapses under the pressure of a multiple-choice stem describing a pilot's behavior.
What to do instead
Build a three-column table: attitude, a real statement that exemplifies it, and the antidote, and recite it until the pairs are automatic. For aeromedical, add a symptom-to-action table: hypoxia responds to supplemental oxygen and descent; hyperventilation responds to controlled breathing and reduction of the breathing rate, with oxygen and descent still appropriate if the cause is unclear.
Mixes up inspection and currency intervals, for example treating the annual inspection and the 100-hour inspection as interchangeable, or claiming a flight review resets passenger-carrying currency.
Recency, currency, and inspection requirements are studied as a loose list of numbers in months and hours with no distinction between calendar time, operating time, and event-driven deadlines.
What to do instead
Create a single matrix with columns for the requirement, the interval, what resets it, and the regulation, and fill in the annual inspection, the 100-hour inspection, the transponder and altimeter checks, the ELT inspection and battery limits, the flight review, and the three takeoff and landing recency rules for day and night. Rebuild the matrix from memory weekly and compare.