FAA Commercial Pilot Airplane (CAX) flashcards

A heat exchanger that cools compressed induction air from the turbocharger before it reaches the cylinders, increasing density and reducing detonation risk.

• Located between compressor discharge and intake manifold
• Increases air density for more power/less detonation risk
• Common on turbocharged high-performance engines

Memory trick: Hot squeezed air needs a cool-down before the burn.

A vestibular illusion in which linear acceleration is misinterpreted as pitching up, and deceleration as pitching down.

• Caused by the inner ear misreading acceleration forces
• Common during rapid takeoff acceleration or go-around power application
• Can lead to inappropriate nose-down control input if not cross-checking instruments

Memory trick: Speed up, feel like you're pitching up — somatogravic

A risk management framework that organizes flight-related risk factors into five categories: Plan, Plane, Pilot, Passengers, and Programming, reviewed at key decision points during a flight.

• Plan = route, weather, fuel requirements
• Plane = airworthiness, equipment, performance
• Pilot = fitness, experience, currency; Passengers = needs/expectations; Programming = automation/avionics setup

Memory trick: Plan, Plane, Pilot, Passengers, Programming — the 5 P's keep you flying safe.

VOR equipment used for IFR navigation must be operationally checked within the preceding 30 days, with results logged.

• 30-day interval
• Acceptable methods: VOT, ground/airborne checkpoints, dual VOR comparison
• Must log date, place, error, and signature

Memory trick: 'VOR every thirty' keeps your compass true.

A visual illusion during night approach over dark, featureless terrain causing pilots to believe they are higher than actual altitude, leading to a dangerously low approach.

• Occurs when runway lights are the only visual reference at night
• Leads to flying below the correct glidepath
• Mitigated by using VASI/PAPI and instrument references

Memory trick: No lights around, you sink to the ground

A condition where fuel vaporizes in injection lines due to engine heat soak, disrupting fuel flow and causing hard hot starts.

• More common in fuel injection than carburetion
• Caused by heat soak after shutdown
• Mitigated by proper hot-start procedures (e.g., mixture/throttle technique)

Memory trick: Hot lines boil the fuel — vapor lock locks out the start.

The limit load factor is the maximum load an airplane can sustain without permanent deformation; the ultimate load factor (limit x 1.5 safety factor) is the point at which structural failure is expected.

• Ultimate load factor = limit load factor x 1.5
• Between limit and ultimate: possible permanent deformation, not failure
• Certification standards require this built-in safety margin

Memory trick: Limit bends it, ultimate (1.5x) breaks it.

Power-on stall speed is typically lower than power-off stall speed because propeller slipstream increases airflow energy over the wing and a vertical thrust component helps support the airplane, delaying the stall.

• Slipstream increases effective airflow speed over the wing root area.
• A component of thrust acts to help support weight at high pitch attitudes.
• This is why power-on stalls occur at a lower indicated airspeed than power-off stalls.

Memory trick: Power blows extra air over the wing, delaying the stall to a slower speed.

A mechanical pin/lock on the landing gear control lever that must be released before the lever can be moved up, backing up the squat switch against inadvertent ground retraction.

• Mechanical backup to the electrical squat switch
• Must be manually released to select gear up
• Prevents accidental gear retraction while airplane is on the ground

Memory trick: Pin locks the lever so ground crews can't accidentally fold the legs.

The skill of prioritizing and distributing flight deck tasks so that critical duties such as aircraft control and communication are not neglected during periods of high workload.

• Follow the priority order: aviate, navigate, communicate
• Avoid task fixation on secondary tasks like avionics programming during critical phases
• Part of Single-Pilot Resource Management (SRM) principles

Memory trick: Aviate first, navigate second, communicate third — never forget the order.

A runup procedure of moving the prop control through its range to circulate warm oil and purge trapped air from the governor/hub for reliable pitch response.

• Performed before takeoff along with other engine checks
• Helps ensure smooth, responsive governor operation
• Distinct from a feathering check, which is separate where applicable

Memory trick: Cycle it warm, purge the air, keep the pitch fair.

A backup method, typically a mechanical release or hand pump, that allows the landing gear to free-fall and lock down if the primary hydraulic system fails.

• Mechanical release disconnects hydraulic lock
• Gravity and airflow help gear extend
• Some systems use a hand pump to build backup pressure

Memory trick: When hydraulics quit, gravity does the work.

A normally aspirated engine's full-throttle manifold pressure drops roughly 1 inHg per 1,000 feet of altitude gain because it cannot compress air above ambient pressure.

• No compressor to maintain sea-level MP at altitude
• Approx. 1 inHg loss per 1,000 ft
• Contrasts with turbocharged engines, which hold MP up to critical altitude

Memory trick: Every 1,000 feet up costs about 1 inch of manifold pressure.

A review of operating rules and a flight of at least 1 hour required every 24 calendar months under 14 CFR 61.56 to act as PIC.

• Due every 24 calendar months, counted from the end of the month completed.
• Must be given by an authorized instructor unless substituted by WINGS completion.
• Not required if the pilot has passed a checkride or proficiency check within the period.

Memory trick: "24 months, WINGS or review, keeps your PIC privileges true."

In a counterweight-type propeller, loss of governor oil pressure allows counterweights and spring force to drive blades toward high pitch, decreasing RPM.

• Oil pressure = low pitch (fine)
• Counterweights/spring = high pitch (coarse)
• Oil loss results in reduced RPM, not overspeed

Memory trick: No oil, no fine pitch — counterweights coarsen the blades and calm the RPM.

A night-vision scanning technique in which a pilot looks slightly to the side of an object rather than directly at it to use the more light-sensitive rod cells in peripheral vision.

• Rods dominate peripheral vision and are more sensitive in low light
• Cones dominate central vision and require more light, causing a night blind spot when staring directly ahead
• Full dark adaptation takes approximately 30 minutes

Memory trick: Look beside it, not at it, to see it at night.

The effective use of all available resources by a single pilot to manage workload, tasks, and decision-making safely.

• Prioritization follows 'Aviate, Navigate, Communicate'
• Encourages task shedding of non-critical duties during high workload
• Includes use of automation, checklists, and ATC as resources

Memory trick: Aviate, Navigate, Communicate — fly first, talk later

Airplanes flown IFR in controlled airspace must have their static pressure system, altimeter, and altitude reporting equipment tested within the preceding 24 calendar months.

• Applies only to IFR flight in controlled airspace
• 24 calendar month interval
• Test must follow Part 43 Appendix E procedures

Memory trick: '24 for Altimeters and ATC gear' — both systems share the same 2-year clock.

The load factor (G-force) in a coordinated, constant-altitude turn is calculated as 1 divided by the cosine of the bank angle.

• Formula: n = 1/cos(bank angle)
• 30° bank = 1.15 G
• 45° bank = 1.41 G
• 60° bank = 2.0 G

Memory trick: Steeper bank, heavier back (into your seat)!

14 CFR 91.417 distinguishes between maintenance records kept for 1 year (routine work) and total time-in-service records that must be retained permanently and transferred with aircraft ownership.

• Routine maintenance/inspection records: retained until superseded or 1 year, whichever occurs first.
• Total time-in-service records (airframe, engine, propeller, rotor): retained permanently.
• Permanent records must transfer with the aircraft to a new owner.

Memory trick: "One year for the fix, forever for the total time trick."

In SIGMETs, altitudes prefixed with 'FL' (Flight Level) indicate thousands of feet Mean Sea Level (MSL), used primarily at or above 18,000 feet MSL.

• FLXXX means XXX00 feet MSL.
• Commonly used for high-altitude weather phenomena.
• Crucial for flight planning at higher altitudes.
• Below 18,000 feet MSL, altitudes are typically given as MSL or AGL.

Memory trick: Flight Levels Fly High, always in thousands MSL.

For structural icing to form, two primary conditions must be met: visible moisture and an outside air temperature (OAT) at or below freezing (0°C).

• Visible moisture includes clouds, fog, rain, or drizzle.
• OAT of 0°C to -10°C often produces clear ice.
• OAT of -10°C to -20°C often produces rime ice.

Memory trick: Icing's a freeze, needs water and zero degrees.

Standardized shorthand used in Area Forecasts to convey weather conditions concisely.

• Used for clouds, precipitation, and other meteorological phenomena.
• Requires knowledge of common aviation weather codes.
• Essential for understanding regional weather trends.

Memory trick: FA abbreviations are like a weather text message; decode each part carefully.

An opaque, milky, and brittle ice formation that results from the rapid freezing of small supercooled water droplets on impact with an aircraft surface.

• Forms at colder temperatures than clear ice, typically -10°C to -20°C.
• Less dense than clear ice, but can significantly alter airfoil shape.
• Often associated with stratiform clouds.

Memory trick: Rime is milky and brittle, clear is glass, mixed is both, a dangerous mass.

Aviation weather reports (METARs) use specific codes to describe cloud coverage and height.

• FEW: Few (1/8 - 2/8 cloud coverage)
• SCT: Scattered (3/8 - 4/8 cloud coverage)
• BKN: Broken (5/8 - 7/8 cloud coverage)
• OVC: Overcast (8/8 cloud coverage)

Memory trick: Few, Scatter, Broken, Overcast – each takes more sky from low to high.

Fog that forms when warm, moist air moves horizontally over a cooler surface, causing the air to cool to its dew point.

• Common along coastlines and over oceans.
• Can be quite dense and widespread.
• Often forms with light to moderate winds, unlike radiation fog which requires calm conditions.

Memory trick: Advection's Air: Moves Warm over Cold.

METARs report cloud layers in ascending order of height, indicating coverage and height in hundreds of feet AGL.

• Coverage: FEW (1/8-2/8), SCT (3/8-4/8), BKN (5/8-7/8), OVC (8/8).
• Heights are in hundreds of feet AGL (Above Ground Level).
• Only significant cloud layers are reported, usually up to the highest layer of BKN or OVC.

Memory trick: METAR's Clouds: AGL, Lowest to Highest Coverage.

A weather front that is not moving, typically characterized by a prolonged period of similar weather conditions.

• Boundary between two air masses that are not advancing.
• Often results in extended periods of precipitation and low ceilings.
• Can persist for several days, causing significant disruption to aviation.

Memory trick: Stationary stands still, bringing long rains and chill.

The standard atmospheric lapse rate is the average rate at which temperature decreases with increasing altitude, approximately 2°C per 1,000 feet (or 3.5°F per 1,000 feet) in the troposphere.

• Temperature decreases with altitude.
• Average rate is 2°C per 1,000 feet.
• Variations exist due to local weather conditions.
• Used to estimate temperatures at different altitudes.

Memory trick: Lapse Rate: Lower Air, Cooler Climb.

A temperature inversion is an atmospheric phenomenon where the air temperature increases with increasing altitude, rather than decreasing as is typical. This condition often results in stable air, poor visibility, and can trap pollutants.

• Temperature increases with altitude.
• Creates very stable atmospheric conditions.
• Can lead to reduced visibility (fog, haze).
• Common during clear, calm nights (radiation inversions) or frontal activity.

Memory trick: Inversion: Inverted Temp, Incredibly Stable.

A localized column of sinking air within a thunderstorm or rain shower that produces an outward burst of damaging winds on or very near the ground.

• Extremely dangerous due to severe, rapid wind shear and downdrafts.
• Can produce wind speed differentials of 100 knots or more.
• Often associated with virga, dust rings, or heavy rain shafts.

Memory trick: Microburst's a sudden dive, headwind then tail, hard to survive.

A SIGMET (Significant Meteorological Information) is a weather advisory issued for significant, non-convective weather phenomena that are potentially hazardous to all aircraft, such as severe icing, severe turbulence, or widespread dust/sandstorms.

• Issued for all aircraft.
• Covers widespread, non-convective weather.
• Valid for up to 4 hours (or 6 hours for hurricanes/typhoons).
• Warns of severe icing, severe turbulence, dust/sandstorms, volcanic ash.

Memory trick: Advisories: Always Advise Airmen.

Water droplets larger than typical cloud droplets that remain in liquid form at temperatures below 0°C.

• Includes freezing rain and freezing drizzle.
• Causes severe clear icing due to their ability to spread before freezing.
• Extremely hazardous to aircraft, as de-icing systems may be overwhelmed.

Memory trick: SLD's a clear threat, spreading wide, hard to get.

Pilot Reports (PIREPs) are the best source for obtaining detailed, real-time information about actual cloud bases, tops, and vertical extent encountered by aircraft in flight.

• Actual observations by pilots.
• Provides cloud bases and tops.
• Includes cloud types and layers.
• Crucial for understanding actual vertical cloud conditions.

Memory trick: Cloud's height: PIREP's light, for vertical flight.

An in-flight weather advisory issued for hazardous convective weather that is significant to the safety of all aircraft.

• Issued hourly for specific criteria of severe thunderstorms.
• Criteria include tornadoes, large hail, strong winds, and organized thunderstorm activity.
• Valid for 2 hours, or until superseded.

Memory trick: Convective SIGMET: Thunder's Top Threats.

The 'TA' element in a PIREP reports the temperature aloft, always in degrees Celsius. 'M' indicates a negative value.

• TA is Temperature Aloft.
• Values are in degrees Celsius.
• 'M' preceding a number indicates minus/negative.
• No 'M' indicates positive temperature.

Memory trick: PIREP's temp: Minus 'M' or plus, Celsius for us.

SIGMETs specify altitude ranges for hazardous weather using 'BLW' (below), 'ABV' (above), or a range between two flight levels or MSL altitudes.

• FL refers to Flight Level (hundreds of feet MSL, e.g., FL200 = 20,000 ft MSL).
• MSL altitudes are usually given as three digits (e.g., 080 = 8,000 ft MSL).
• A range like 'BLW 080 FL200' indicates between 8,000 ft MSL and 20,000 ft MSL.

Memory trick: SIGMET's sky levels, a pilot's high-low truth.

In a PIREP, sky cover is reported using standard abbreviations (SCT, BKN, OVC) followed by the cloud base height in hundreds of feet AGL. If a distinct 'layer' is observed, it's often reported as OVC for that layer.

• SCT: Scattered (3/8-4/8 coverage).
• BKN: Broken (5/8-7/8 coverage).
• OVC: Overcast (8/8 coverage).
• Cloud base height is in hundreds of feet AGL.

Memory trick: PIREP Clouds: See the Sky, State the Story, in Hundreds High.

A sudden change in wind speed or direction over a short distance, which can significantly affect aircraft performance.

• Can occur horizontally or vertically.
• Often associated with fronts, thunderstorms, and inversions.
• Critical during takeoff and landing phases.

Memory trick: Shear's a steal, it'll slow your wheel. Headwind's gone, your descent is drawn.

Clear ice forms from supercooled large droplets (SLD) that impact an aircraft and spread across the airfoil surface before freezing, creating a smooth, transparent, and often significant ice accumulation.

• Forms from Supercooled Large Droplets (SLD).
• Droplets spread before freezing.
• Results in a smooth, transparent ice layer.
• Can be very tenacious and difficult to remove.

Memory trick: Clear ice's secret: SLD's spread, a frozen sheet.

A TAF (Terminal Aerodrome Forecast) 'TEMPO' group indicates temporary fluctuations in weather conditions expected to last for less than one hour in each instance, and covering less than half of the forecast period.

• Indicates temporary changes, not permanent.
• Conditions are expected to last for less than one hour at a time.
• Covers less than half of the forecast period.
• Commonly used for visibility, weather phenomena, or sky conditions.

Memory trick: TAF's TEMPO: Time-limited, not forever.

The initial stage of thunderstorm development, characterized by strong, continuous updrafts and rapid vertical growth of a cumulus cloud.

• Cloud has a 'cauliflower' appearance, towering vertically.
• Updrafts dominate, with little to no precipitation or lightning.
• Lasts about 10-15 minutes, building towards the mature stage.

Memory trick: Cumulus Builds, Mature Rains, Dissipating Dries.

Virga is precipitation that falls from a cloud but evaporates or sublimes before reaching the ground. It appears as streaks or wisps extending below the cloud base.

• Precipitation that does not reach the ground.
• Appears as streaks or wisps from cloud base.
• Can be associated with strong downdrafts (microbursts).
• Common in dry atmospheric layers below clouds.

Memory trick: Virga: Vaporizing Rain, Ground-Avoided.

A TAF forecast group indicating non-convective low-level wind shear, typically within 2,000 feet AGL.

• Reported as 'WS' followed by altitude in hundreds of feet AGL.
• Then followed by wind direction and speed at that altitude.
• Crucial for takeoff and landing considerations.

Memory trick: WS means Wind Shear, then hundreds of feet, then wind for your flight feet.

In a TAF (Terminal Aerodrome Forecast), 'PROB30' or 'PROB40' indicates a 30% or 40% probability, respectively, of the specified weather phenomenon occurring during the indicated time period.

• PROB30 = 30% probability.
• PROB40 = 40% probability.
• Indicates a low to moderate chance of occurrence.
• Weather specified is expected to occur, but with uncertainty.

Memory trick: PROB: Percentage of Possibility, Precisely Pointed.

The High-Level Significant Weather Prognostic Chart (SIGWX PROG) forecasts significant weather phenomena, including clear air turbulence, icing, and tropopause heights, for flight levels from 25,000 to 63,000 feet MSL.

• Forecasts for FL250 to FL630.
• Shows clear air turbulence (CAT) areas.
• Indicates jet stream locations.
• Displays tropopause heights and folds.

Memory trick: CAT's high flight: SIGWX PROG, day and night.

In a Terminal Aerodrome Forecast (TAF), 'PROB30' indicates a 30% probability of the described weather occurring during the specified time period.

• PROB30 indicates a low probability (30%)
• PROB40 indicates a moderate probability (40%)
• The time period is given as DDHH/DDHH, where DD is the day and HH is the hour (UTC).

Memory trick: Probability's Time, Type, and Truth, from a TAF's weather youth.

On a Sectional Aeronautical Chart, a 'V' symbol (often within a flag or star) marks a VFR Checkpoint, which is a prominent landmark used by VFR pilots for navigation and position reporting.

• Identifies a prominent landmark.
• Used for visual navigation.
• Can be used for position reporting to ATC.
• Helps pilots stay oriented in VFR conditions.

Memory trick: Chart Symbols: Clues for Clear Choices.

Surface visibility is reported from the ground, while flight visibility is the average forward horizontal distance seen from the cockpit.

• Can differ significantly, especially with ground-based obscurations.
• Pilots must be aware of both for safe operations.
• Density of obscuring phenomena often varies with altitude.

Memory trick: Ground's got its own view, higher up, the world's new.

Lenticular clouds (Altocumulus Lenticularis) are distinctive lens-shaped clouds that form in stable air when strong winds blow over mountainous terrain, indicating the presence of mountain waves.

• Lens-shaped, often appear stationary.
• Form in stable air.
• Strong indicator of mountain waves.
• Associated with strong winds at altitude.

Memory trick: Lenticular: Lens-like, Lofty, Linked to Waves.

A cold front is the leading edge of a cooler air mass, displacing a warmer air mass, typically resulting in unstable atmospheric conditions, cumuliform clouds, showery precipitation, and potentially severe weather like thunderstorms and turbulence.

• Rapid temperature drop after passage.
• Cumuliform clouds (cumulus, cumulonimbus).
• Showers, thunderstorms, and squall lines.
• Associated with turbulence and gusty winds.

Memory trick: Cold Front: Crash of Clouds, Quick Change.

In a SIGMET, 'FRZLVL' indicates the freezing level. 'SFC' denotes the surface, and numerical values (e.g., '080') represent thousands of feet MSL, describing the altitude of the 0°C isotherm.

• FRZLVL = Freezing Level.
• SFC = Surface.
• Numbers (e.g., 080) are in thousands of feet MSL.
• Can indicate a single level or a layer (e.g., SFC-080).

Memory trick: SIGMET FRZLVL: Freezing Level, from the Surface, up to the Sky.

Clear ice forms when supercooled large water droplets (SLD) strike an aircraft surface and freeze slowly, spreading out to form a smooth, clear, and tenacious layer of ice.

• Typically occurs at temperatures between 0°C and -10°C, but can form up to +2°C or +3°C.
• Associated with cumuliform clouds, freezing rain, and freezing drizzle.
• Most dangerous type of icing due to its rapid accumulation and difficulty of removal.

Memory trick: Ice forms when water is supercooled, even if the air feels slightly warm.

A TAF forecast group indicating the probability of specific weather conditions occurring.

• Reported as 'PROB' followed by a percentage (e.g., PROB30, PROB40).
• Indicates a chance of conditions, not a certainty.
• Significant for flight planning, especially for marginal VFR/IFR conditions.

Memory trick: PROB is the 'prob'ability of bad weather; it's a chance, not a sure thing.

Thunderstorms that are hidden within other cloud layers, making them impossible to see from the cockpit.

• Extremely dangerous for pilots due to lack of visual cues.
• Often associated with widespread areas of instrument meteorological conditions (IMC).
• Requires significant deviation or ground-based radar for avoidance.

Memory trick: Embedded means hidden, a storm unseen, a danger unfurled, a treacherous scene.

A classification system (Light, Moderate, Severe, Extreme) used in PIREPs to describe the intensity of atmospheric turbulence and its effects on aircraft.

• Pilot judgment is key in reporting.
• Important for hazard avoidance and flight planning.
• Each category has specific aircraft and occupant effects.

Memory trick: Light, Moderate, Severe, Extreme – each bumpier, a pilot's bad dream.

The most intense stage of a thunderstorm, characterized by both strong updrafts and downdrafts, heavy precipitation, lightning, and often a visible anvil top.

• Updrafts reach their maximum velocity and extend to the tropopause.
• Downdrafts begin and spread out, creating a gust front.
• Greatest hazard to aviation due to intense turbulence, hail, and heavy rain.

Memory trick: Thunderstorms grow (Cumulus), get mad (Mature), then die (Dissipating).

Aircraft certificated before August 11, 1971, are not required to have an anti-collision light system if operated during daylight hours under Part 91.

• Applies to aircraft certificated before August 11, 1971.
• Operation must be during daylight hours.
• Allows operation without an anti-collision light system.

Memory trick: Old planes in the day, no flashy display.

An aircraft is considered airworthy if it conforms to its type design and is in a condition for safe operation. Minor cosmetic damage not affecting these two criteria generally does not render an aircraft unairworthy.

• Two primary components: conformity to type design and condition for safe operation.
• Pilot is responsible for determining airworthiness before flight.
• Inoperative equipment rules (91.213) apply to specific components, not general cosmetic damage.

Memory trick: Is the plane in 'SAFE' condition and 'CONFORMS' to its design?

To act as pilot in command for compensation or hire, a pilot must hold a Commercial Pilot Certificate with the appropriate aircraft category and class ratings.

• Commercial Pilot Certificate is the baseline.
• Must have category (e.g., Airplane) and class (e.g., Single-Engine Land) ratings.
• Additional endorsements (complex, high-performance) may be needed for specific aircraft, but are not part of the core certificate/rating requirement for commercial privileges.

Memory trick: Commercial pilots earn their wings with the right certificate and ratings.