ANAC Private Pilot Airplane (PPA) (ANAC) common mistakes
ANAC Private Pilot Airplane (PPA) · Understand the traps and how to avoid them.
Treating the VFR weather minimums as a single set of numbers, so the candidate applies the same visibility and cloud-clearance figures regardless of airspace class or altitude band.
The minima are tabulated by airspace class and by whether the flight is above or below a specified altitude, and candidates memorise one column of the table (usually the one for controlled airspace near their home field) instead of learning the structure of the table.
What to do instead
Rebuild the table from first principles on a blank sheet: rows for each airspace class, columns for visibility and distance from cloud, and a note on which altitude band each row applies to. Then answer ten scenario questions where only the airspace class changes, and state aloud which row you used and why.
Computing mass and balance with the empty-mass moment taken from the wrong column, or forgetting to convert arm in inches to arm in metres before multiplying, producing a centre of gravity that looks plausible but is wrong.
Candidates copy the first moment figure they see in the loading table without checking whether the table is already in moment units or in arm units, and unit mixing between imperial and metric tables goes unnoticed because the arithmetic still produces a number inside the envelope.
What to do instead
Before any calculation, write the units of every column at the top of the working. Do the sum twice: once by multiplying each mass by its arm, once by using the tabulated moments directly, and reconcile the two. Practise with at least one loading where the CG is deliberately outside the forward limit so the error becomes visible.
Reading the take-off or landing distance chart at the intersection of the actual mass and the actual conditions without applying the intervening correction factors for wind, slope, surface, or temperature.
The chart is read as a single lookup rather than as a sequence of steps, and candidates stop as soon as they have a distance on the scale instead of continuing through the remaining correction lines.
What to do instead
Adopt a fixed written sequence for every performance chart: pressure altitude, temperature, mass, then each correction in the order printed on the chart, writing the intermediate value after each step. Mark the chart itself with numbered arrows during study so the order becomes automatic.
Answering human performance questions by choosing the option that describes the 'safe' or 'correct' behaviour rather than the option that describes what people actually do under stress.
The domain tests knowledge of typical limitations such as narrowed attention, expectation bias, and the unreliability of memory under workload, but candidates answer from an idealised self-image instead of from the evidence.
What to do instead
For each question, first identify which limitation is being tested (attention, perception, memory, decision-making, or physiology), then choose the option that matches the documented limitation. Study the classic demonstrations such as change blindness and the effect of hypoxia on judgement until the pattern is familiar.
Confusing the conditions that produce a stable air mass with those that produce an unstable one, so the candidate predicts the wrong cloud type and the wrong turbulence for a given forecast.
The terms are learned as vocabulary rather than as a causal chain, so the link between lapse rate, vertical motion, and resulting weather is missing and each question is answered from a different half-remembered association.
What to do instead
Draw the causal chain once: surface heating or forced lifting, then the comparison of the environmental lapse rate with the adiabatic rates, then vertical motion, then cloud form and turbulence. Apply the same chain to five different forecasts and predict the weather before checking the answer.
Plotting a navigation leg with the protractor aligned to the grid lines of the chart or to the aircraft's heading rather than to true north, and then applying magnetic variation in the wrong direction.
The plotting sequence true track, variation, deviation, and wind correction is compressed into one step, and the candidate cannot say at which point in the sequence a given number belongs.
What to do instead
Write the sequence as a ladder on the plog sheet: true track, apply variation to get magnetic track, apply wind to get heading, apply deviation to get compass heading. Say the direction of the variation correction aloud each time ('variation west, magnetic best') and check the answer against the chart's own compass rose.
Selecting the transponder code, squawk, or radio frequency from memory without confirming it against the published plate or the clearance as read back, and reading back only part of an ATC clearance.
Radiotelephony is practised as a script rather than as a confirmation loop, so candidates treat the readback as a formality and drop the elements they believe they already know.
What to do instead
Practise readbacks with a partner who deliberately embeds three elements (route, level, frequency) and penalises any omission. Always read back the full clearance including the frequency, and verify the squawk by repeating the four digits individually.
Explaining lift by citing the equal-transit-time story of air over the wing meeting air over the lower surface, and using it to justify why a wing stalls.
The explanation is memorable and widely repeated, so it survives into the exam despite being inconsistent with the observed behaviour of real aerofoils at high angles of attack.
What to do instead
Replace it with the circulation and angle-of-attack explanation: lift depends on deflecting the airflow downward, the stagnation point moves aft as angle of attack increases, and the boundary layer separates at the critical angle. Be able to state why lift falls after the critical angle without referring to transit times.
Treating electrical system questions as a list of components rather than as a circuit, so the candidate cannot predict what happens to the ammeter or the remaining equipment when the alternator fails.
The system is studied from a labelled diagram with the current flow omitted, and the relationship between the battery, the alternator, and the bus is never made explicit.
What to do instead
Draw the circuit from memory with the battery, alternator, regulator, bus, and load, and mark the direction of current in normal and failed operation. Then answer questions about indicated ammeter behaviour by tracing the current path rather than recalling a fact.
Planning solo consolidation by hours to be logged rather than by specific competencies to be demonstrated, so the candidate repeats comfortable exercises and never practises the weak ones.
The requirement is expressed in flight time, and candidates optimise for the number that is recorded rather than for the manoeuvres that are still unreliable.
What to do instead
Before each solo flight, write one or two specific exercises to be flown and the standard to be met, drawn from the instructor's debrief of the previous flight. After landing, record whether the standard was met and carry the unmet item forward to the next flight.