ANAC Commercial Pilot Airplane (PCA) common mistakes
ANAC Commercial Pilot Airplane (PCA) · Understand the traps and how to avoid them.
Applying a memorized rule of thumb (e.g., V speeds, fuel reserves, or takeoff minimums) without checking whether the stated conditions (aircraft category, altitude, day/night, IFR/VFR) actually match the rule's applicability.
Candidates memorize numbers from the regulation text but skip the applicability clause at the start of the paragraph, so the rule is recalled correctly but applied to the wrong scenario.
What to do instead
Before computing, write the applicability conditions in the margin (category, regime, conditions) and tick each one against the question stem; only then apply the number.
Answering a weight-and-balance item using the takeoff weight and CG when the question asks about landing weight or about a zero-fuel condition, or forgetting that fuel burn shifts the CG.
Most practice problems are set up at takeoff, so candidates default to the takeoff envelope and ignore that the scenario describes a later phase where mass and moment have changed.
What to do instead
For each W&B problem, label the phase, list mass and moment for each item, and recompute the CG at the phase asked about before reading the answer options.
Reading a performance chart at the wrong reference (e.g., entering a density-altitude chart with pressure altitude, or a takeoff distance chart without applying the wind/slope/condition corrections in the specified order).
Charts have multiple entry axes and correction factors, and candidates apply corrections in the wrong sequence or skip the intermediate step, producing a plausible but wrong value.
What to do instead
Practice each chart with a written step order (pressure altitude to density altitude, then base distance, then wind, slope, surface), and always verify the final value against the chart's stated units and notes.
Confusing indicated, calibrated, true airspeed and groundspeed when solving navigation or performance problems, or using TAS where groundspeed is required.
The terms appear interchangeable in casual study, and the wind triangle requires a specific pair; candidates plug in whichever speed is given first.
What to do instead
Annotate every speed in the question with its type before solving, and convert explicitly (IAS to CAS to TAS to GS) showing each step.
Mixing up QNH, QFE, and QNE and the resulting altimeter reading, or failing to apply the correct transition altitude/level rule.
The three settings differ only by reference datum, and candidates memorize the definitions without linking each to the altitude actually displayed and to the semi-circular/transition rules.
What to do instead
Build a one-line table (setting to reference datum to what the altimeter reads) and drill scenarios where the aircraft crosses the transition altitude, stating the setting change and the reading on each side.
Selecting a human-factors answer that describes the correct concept but not the scenario, e.g., labeling a case of reduced attention as 'complacency' when the stem describes fatigue, or vice versa.
The human performance vocabulary (hypoxia, hyperventilation, spatial disorientation, illusion types) overlaps in symptoms, and candidates match on a single keyword rather than the full pattern.
What to do instead
For each scenario, write the distinguishing features (onset speed, triggers, whether instruments resolve it) and match against a symptom checklist rather than a single word.
Treating a stability/control question as a memorized statement (e.g., 'aft CG improves performance') without reasoning about the underlying moment balance, so the answer flips when the question asks about stability or stall recovery instead.
Study material compresses principles into slogans, and candidates lose the causal chain linking CG, tail downforce, stability, and stall behaviour.
What to do instead
For each principle-of-flight item, sketch the forces and moments and derive the consequence in one sentence before choosing an option.
Using the wrong phraseology or readback content, omitting the callsign, or reading back only part of an ATC clearance.
Candidates learn phraseology as isolated phrases and do not practice full readbacks, so items testing required readback elements (altitude, heading, frequency, runway) are missed.
What to do instead
Practice full readbacks aloud for clearance, taxi, takeoff, and approach clearances, and check each readback against the required-elements list.
Applying a generic operational rule (e.g., fuel reserve, alternate requirement, or minima) without checking the operation type, aircraft category, or approach type named in the stem.
Operational procedures questions combine regulation and procedure, and candidates answer from the general case rather than the specific category or approach described.
What to do instead
Highlight the operation type, category, and approach type in the stem first, then select the rule that names those conditions.
Misidentifying the aircraft system or component affected by a described failure (e.g., confusing which system provides pressurization, anti-ice, or electrical backup) and choosing a consequence that does not follow.
Systems are studied as separate diagrams, and candidates recognize a component name but not its function in the overall architecture or its failure consequences.
What to do instead
For each major system, write a one-page flow (source, control, indication, failure effect) and test yourself by predicting the cockpit indication and required action for each failure.