FAA Private Pilot Airplane (PAR) flashcards

Class C airspace requires two-way radio communication to be established with ATC prior to entry, but not an explicit clearance.

• Controller must use aircraft call sign in response to confirm contact
• Requires operable transponder with Mode C
• Outer area typically extends 20 NM with radar service available

Memory trick: Orange Circle just needs a 'Hello' (radio contact)

Density altitude is pressure altitude corrected for non-standard temperature; it represents the altitude in the standard atmosphere where the aircraft's true performance would be experienced.

• PA = field elevation + (29.92 − altimeter setting) × 1,000
• Standard temp decreases 2°C per 1,000 ft from 15°C at sea level
• Approx. rule: DA = PA + (120 × °C above standard temperature)

Memory trick: Pressure altitude first, then add 120 ft per degree hot

In Class G airspace at or below 1,200 feet AGL during the day, VFR flight requires only 1 statute mile visibility and remaining clear of clouds.

• Applies specifically to daytime operations
• Above 1,200 feet AGL but below 10,000 feet MSL, minimums increase to match Class E
• Night minimums in Class G are more restrictive: 3 SM and 1000/500/2000 clearance

Memory trick: Low and day, 1 mile clear away

Special use airspace extending from 3 nautical miles outward from the U.S. coast that may contain hazards similar to a Restricted Area, but the FAA cannot restrict flight through it because it lies over international waters.

• Extends seaward from 3 NM offshore
• Same potential hazards as Restricted Areas: military exercises, ordnance, etc.
• Pilots may legally enter but should exercise extreme caution and contact controlling agency

Memory trick: 'Warning Area: watch out, waters, no walls FAA can build'

AIRMET Sierra warns of widespread IFR conditions (ceilings below 1,000 feet and/or visibility below 3 statute miles) and/or extensive mountain obscuration, affecting a significant portion of the forecast area.

• Sierra = IFR conditions/mountain obscuration
• Tango = turbulence and sustained surface winds ≥30 knots
• Zulu = icing and freezing levels

Memory trick: 'Sierra Sees poor Sight' — Sierra covers IFR/mountain obscuration.

A pitot-static system malfunction where a blocked pitot tube with a functioning drain hole causes the airspeed indicator to behave like an altimeter, rising in climbs and falling in descents.

• Pitot blockage alone (drain hole also blocked) freezes ASI at last correct reading
• Pitot blockage with open drain hole lets static pressure enter, causing altimeter-like ASI behavior
• Static port blockage affects altimeter, VSI, and ASI differently than pitot blockage

Memory trick: Open drain lets static sneak in and fake the climb.

A marking consisting of two solid and two dashed yellow lines across a taxiway, indicating where aircraft must stop before entering a runway unless cleared by ATC.

• Solid lines face the pilot approaching the runway
• Aircraft must hold short of the solid lines until cleared
• At nontowered airports, pilots hold short and check for traffic before crossing

Memory trick: Solid lines say STOP, dashed lines say you may go if cleared

A personal pre-flight self-assessment checklist covering Illness, Medication, Stress, Alcohol, Fatigue, and Eating/Emotion used to determine fitness to fly.

• I = Illness
• M = Medication
• S = Stress (life pressures)
• A = Alcohol

Memory trick: I'm Safe To Fly: Illness, Medication, Stress, Alcohol, Fatigue, Eating

A Convective SIGMET is issued for severe or embedded thunderstorms, tornadoes, hail 3/4 inch or larger, surface winds of 50 knots or greater, or a line of thunderstorms at least 60 NM long affecting 40% of its length.

• Convective SIGMETs are issued for the continental U.S. only
• They imply the presence of severe turbulence, severe icing, and low-level wind shear
• Issued hourly with special updates as needed

Memory trick: '60 and 40' — 60 miles long, 40 percent coverage triggers the alert

Below 10,000 feet MSL, Class E airspace requires 3 statute miles visibility and cloud clearances of 1,000 feet above, 500 feet below, and 2,000 feet horizontal.

• Applies to Class E surface areas at nontowered airports
• At or above 10,000 ft MSL minimums increase to 5 SM visibility and 1,000/1,000/1 mile clearances
• Class E surface areas depicted by dashed magenta lines on sectional charts

Memory trick: 3-152: 3 miles, 1000 above, 500 below, 2000 across

Density altitude is calculated by first finding pressure altitude (correcting for altimeter setting) and then adjusting for temperature deviation from the standard lapse rate.

• Pressure altitude = elevation − (altimeter setting−29.92)×1,000
• Standard temperature decreases 2°C per 1,000 ft from 15°C at sea level
• Rule of thumb: DA ≈ PA + 120 ft per °C above standard temperature

Memory trick: Pressure first, then heat, gives you the density altitude treat.

Arrows point to a threshold line that is displaced from the actual runway end, indicating the pavement before the line may be used for takeoff and rollout, but not for landing touchdown.

• Marked by arrows pointing toward the threshold line
• Used when an obstruction or other factor shortens the landing distance available
• Full pavement remains usable for taxi, takeoff, and landing rollout

Memory trick: 'Arrows point but don't touch down before the line'

High density altitude reduces engine power, propeller efficiency, and lift, all of which degrade takeoff and climb performance.

• Less dense air = less oxygen for combustion
• Propeller bites less air, producing less thrust
• Wings need higher true airspeed to generate the same lift

Memory trick: Thin air steals your power, thrust, and lift.

The location of the center of gravity strongly affects an airplane's pitch stability; a more forward CG increases stability, while an aft CG decreases it and can make stall recovery more difficult.

• Forward CG increases stability and requires more elevator/back pressure to stall
• Aft CG decreases stability, requires less back pressure to reach a stall, and reduces recovery authority
• Flying outside the aft CG limit can create dangerously unstable or unrecoverable pitch characteristics

Memory trick: Aft and adrift — the tail loses its grip.

An amended TAF (labeled 'TAF AMD') is issued when observed or anticipated weather significantly differs from the previously issued forecast, ensuring pilots have the most current information.

• TAFs are routinely issued four times daily and valid for 24 or 30 hours
• Amendments can be issued anytime conditions warrant, superseding the prior TAF
• 'COR' indicates a correction to a TAF containing an error, distinct from 'AMD'

Memory trick: 'AMD Means Amend the Trend' — a new AMD TAF reflects real weather changes.

Useful load (max gross weight minus empty weight) must be divided among occupants, fuel, and baggage without exceeding the total.

• Useful load = max gross weight − empty weight
• Subtract occupants and fuel weight to find baggage allowance
• Exceeding useful load exceeds max gross weight

Memory trick: Useful load is a budget split three ways.

Adding weight aft of the current CG shifts the CG aft; the new CG is found by dividing the new total moment by the new total weight.

• New moment = old moment + (added weight × its arm)
• New weight = old weight + added weight
• New CG = new total moment ÷ new total weight

Memory trick: Add aft weight, CG creeps aft.

A stable atmosphere resists vertical air movement, producing smooth flight conditions, stratiform clouds, and often poor surface visibility due to trapped moisture, smoke, or haze.

• Stable air = smooth flight, stratus/fog, poor visibility near surface
• Unstable air = cumulus buildups, turbulence, showers
• Inversions often mark the top of stable layers

Memory trick: Stable = Still & Smooth, Unstable = Up & Umbrella clouds

An atmosphere is unstable when a rising parcel of air continues to rise because it remains warmer (less dense) than the surrounding air, promoting vertical cloud development and turbulence.

• Produces cumulus and towering cumulus cloud development
• Associated with good visibility but bumpy, turbulent flight conditions
• Can lead to thunderstorm development if moisture and lift are sufficient

Memory trick: 'Unstable Air, Bumpy Affair' — rising cumulus means a rough ride below.

Load factor = 1 / cos(bank angle) for a level, coordinated turn.

• 30° bank ≈ 1.15 G
• 45° bank ≈ 1.41 G
• 60° bank = 2.0 G
• Load factor increases stall speed proportionally to its square root

Memory trick: Steeper bank, steeper climb in G's: 1/cos does the trick.

Uncontrolled, explosive combustion of the fuel/air mixture in the cylinder caused by excessive heat and pressure, often from lean mixtures at high power.

• Causes: high power, lean mixture, high CHT, low-octane fuel
• Symptoms: rough running, loss of power, engine damage
• Remedy: enrich mixture, reduce power, increase airspeed to cool engine
• Different from pre-ignition, which is caused by a hot spot igniting mixture early

Memory trick: Lean + Hot + High Power = Detonation Disaster.

A reduction in induced drag and downwash that occurs when an airplane flies within approximately one wingspan of the surface.

• Most noticeable within one wingspan of the ground
• Reduces induced drag, allowing lift-off at lower airspeed
• Can cause premature liftoff and difficulty climbing out of ground effect if airspeed is too low

Memory trick: Close to the ground, drag is drowned.

Class B airspace requires the pilot to receive an explicit ATC clearance before entering, along with an operating transponder with Mode C and two-way radio.

• Clearance must be explicit, e.g., 'cleared into Class B airspace'
• Requires Mode C transponder and two-way radio
• Student pilots need specific endorsements to operate in Class B

Memory trick: Big Blue Boundary needs a Big Yes (clearance)

BECMG indicates a gradual change in conditions expected to occur within a specified time window in the forecast, after which the new conditions are expected to persist.

• BECMG differs from TEMPO (temporary) and FM (rapid/abrupt change)
• The two times given represent the window over which the change occurs
• New conditions after BECMG persist until the next change group

Memory trick: BECMG = 'becoming' gradually, like a slow sunrise, not a light switch

A local wind that blows from sea to land during the day, caused by land heating faster than water, creating a pressure gradient that draws cooler marine air onshore.

• Occurs typically in the afternoon when land-sea temperature difference peaks
• Reverses at night as a land breeze once land cools faster than water
• Caused by differential heating due to water's higher specific heat

Memory trick: 'Land Heats, Sea Breeze Cheats' — hot land pulls in cool sea air by day.

Advection fog forms when warm, moist air moves horizontally over a colder surface, cooling the air to saturation; it commonly occurs along coastlines and requires wind for formation.

• Requires horizontal wind movement, unlike radiation fog
• Common along coasts where warm air meets cold currents
• Can be widespread and persist longer than radiation fog

Memory trick: Advection = Air moving over cold water

Virga is precipitation that falls from a cloud but evaporates before reaching the ground; the evaporative cooling can generate a strong downdraft, including microbursts.

• Common beneath cumulonimbus and towering cumulus clouds in dry lower atmosphere
• Evaporative cooling increases air density, accelerating descent
• Can be a visible warning sign of imminent low-level wind shear

Memory trick: 'Vanishing Virga Vents a Vicious downdraft' — evaporating rain can trigger a violent sinking wind.

Landing with a tailwind increases groundspeed at touchdown, significantly increasing the required landing distance compared to landing into the wind.

• Indicated airspeed at touchdown stays the same
• Groundspeed increases with a tailwind
• Even small tailwinds meaningfully lengthen landing distance

Memory trick: Tailwind pushes you past the numbers.

As density altitude increases, true airspeed becomes progressively higher than indicated airspeed for the same indicated reading, because thinner air requires higher true speed to produce equivalent dynamic pressure.

• Rule of thumb: TAS increases about 2% per 1,000 ft of density altitude above IAS
• IAS reflects dynamic pressure, not actual speed through the air
• This is why aircraft need longer takeoff rolls and have faster true groundspeeds at altitude

Memory trick: Thin air means you're moving faster than your gauge admits

Fog that forms when moist, stable air is forced to rise over sloping terrain, cooling adiabatically until saturation occurs.

• Requires stable, moist air and sufficient wind to push air upslope
• Can form during day or night, unlike radiation fog
• Common in areas with gradually rising terrain, such as the high plains

Memory trick: 'Upslope Uplifts, then Cools to Fog' — rising terrain forces air up and cools it to saturation.

The maximum speed at which full or abrupt control deflection can be applied without exceeding the airplane's structural load limits; Va decreases as weight decreases.

• Va(new) = Va(old) × √(W(new)/W(old))
• Lower weight means the wing stalls at a lower speed, reducing the speed at which loads become critical
• Flying above the reduced Va at light weight risks structural damage during abrupt maneuvers or turbulence

Memory trick: Lighter plane, lighter Va — the wing gives up sooner.

Clear ice is a smooth, transparent, and dense form of structural icing that forms when large supercooled water droplets strike the aircraft and freeze slowly, commonly found in cumuliform clouds or freezing rain.

• Formed by large supercooled droplets found in cumuliform clouds
• Freezes slowly, spreading before solidifying, creating a smooth glassy layer
• Difficult to remove and can significantly alter airfoil shape
• Contrast with rime ice, which is rough, opaque, and forms from small droplets in stratiform clouds

Memory trick: Clear ice = clear & slick, Rime ice = rough & white

A full discharge on the ammeter plus a low-voltage annunciator indicates the alternator has stopped charging, leaving only battery power available.

• Ammeter shows current flow to/from battery
• Discharge = battery supplying all loads, no alternator input
• Response: shed nonessential loads, monitor battery voltage, land soon
• Overcharge (opposite issue) shows excessive charging current, risking battery damage

Memory trick: Needle stuck on discharge = alternator quit, battery's now the only battery in the game.

A small, temporary and self-correcting error in gyroscopic attitude indicators that can occur during rapid pitch or bank changes, such as during takeoff acceleration or steep turns.

• Considered a normal characteristic, not a malfunction, if brief and self-correcting
• Different from a failing vacuum pump, which causes a slow, worsening, uncorrected error
• Most noticeable during acceleration, deceleration, or steep turns

Memory trick: A quick wobble that fixes itself is just gyro growing pains.

When weight is moved within an already-loaded airplane, the CG shift can be found without recalculating full moments: shift = (weight moved × distance moved) ÷ total weight.

• Shift direction follows the direction the weight was moved
• Formula: ΔCG = (weight × distance)/total weight
• Faster than recomputing total moment from scratch

Memory trick: Move the box, shift the CG the same way.

In a stabilized climb, thrust exceeds drag to overcome the rearward component of weight along the flight path, while lift is slightly less than total weight.

• Climb flight path tilts the weight vector
• Thrust > Drag sustains the climb
• Lift is slightly less than weight, not more

Memory trick: Climbing tilts the scale — weight leans back onto thrust.

Spiral instability exists when a banked airplane's bank angle tends to increase further rather than return to wings-level, resulting in a descending, tightening spiral if uncorrected.

• Bank angle self-increases, unlike stable dihedral response
• Airspeed and descent rate increase as spiral tightens
• Often called a 'graveyard spiral,' especially hazardous in IMC

Memory trick: Ignore the bank, and it spirals to the ground.

Flying from high to low pressure without resetting the altimeter causes the airplane's true altitude to be lower than the indicated altitude, following the rule 'high to low, look out below.'

• 1 inHg of pressure change ≈ 1,000 feet of altitude error
• High to low pressure without resetting = true altitude lower than indicated
• Low to high pressure without resetting = true altitude higher than indicated

Memory trick: High to low, look out below!

Applying carburetor heat to an iced carburetor typically causes a brief further RPM drop (as warm, less dense air and melting ice disrupt combustion) followed by a recovery to higher RPM as the ice clears.

• Initial RPM drop after applying carb heat is normal if ice is present
• RPM recovers and often exceeds the pre-heat value once ice melts
• This response confirms ice was the cause of the original power loss

Memory trick: Dip then rise — that's ice saying goodbye.

Static stability describes the initial tendency of an aircraft to return to, remain at, or move away from its original trimmed condition after a disturbance.

• Positive: initial tendency to return to trim
• Neutral: stays in new attitude
• Negative: continues moving away from trim

Memory trick: Static = first move; Dynamic = the whole dance afterward.

The turn coordinator uses a canted rate gyro to sense both roll rate and rate of turn, while the attitude indicator uses a gyro to display pitch and bank attitude relative to the horizon.

• Turn coordinator gyro is canted to sense roll and yaw
• Attitude indicator shows pitch and bank, not turn rate
• Both are gyroscopic instruments, but serve different purposes

Memory trick: Turn coordinator feels the roll and the turn; attitude indicator shows the tilt.

Part 23 airplanes are certificated in categories (Normal, Utility, Aerobatic) with different limit load factors and permitted maneuvers; Normal category typically prohibits intentional spins and aerobatic maneuvers.

• Normal category limit load factor: +3.8G
• Utility category allows higher G and limited aerobatic maneuvers like spins
• Aerobatic category allows the widest maneuver envelope, +6.0G typical

Memory trick: Normal means no spins — stick to gentle G's.

A stall entered while skidding or slipping causes one wing to stall before the other, producing a rolling/yawing departure that can develop into a spin.

• Skids raise the outer wing's angle of attack
• Asymmetric stall = one wing stalls first
• This is the classic base-to-final spin scenario

Memory trick: Skid, stall, spin — uncoordinated turns are the spin's best friend.

With the alternator functioning normally, it supplies the electrical system and recharges the battery; the battery's role is primarily starting and serving as a reserve/buffer.

• Alternator = primary power source in flight
• Battery = starting power + buffer/reserve
• Battery becomes primary source only if alternator fails

Memory trick: Alternator drives, battery backs up.

As altitude increases, air density decreases; without leaning, the fuel/air mixture becomes progressively richer, requiring the pilot to lean the mixture to maintain proper engine operation.

• Air density decreases with altitude
• Unadjusted mixture becomes richer at altitude
• Leaning restores proper fuel/air ratio and engine performance

Memory trick: Higher you climb, richer it gets — lean to compensate.

For VFR flight in Class E airspace at or above 10,000 feet MSL, pilots must maintain 5 statute miles visibility, 1,000 feet below, 1,000 feet above, and 1 statute mile horizontal from clouds.

• Applies to Class E airspace.
• Altitude is at or above 10,000 feet MSL.
• Minimums: 5 SM visibility, 1000' below, 1000' above, 1 SM horizontal.

Memory trick: Easy Echo, Elevation is Everything for Enroute.

A large yellow 'X' placed on a runway indicates that the runway is temporarily closed or unusable for all aircraft operations. For permanent closures, 'X's may be more numerous and extensive.

• Marking: Large yellow 'X' on runway surface.
• Meaning: Runway is closed or unusable.
• Often indicates temporary closure.

Memory trick: Runway signs and lines tell you where to go and not to go.

At nontowered airports, a 'T' (landing direction indicator) within a segmented circle indicates the landing direction and, by extension, the direction of the airport's traffic pattern.

• Found at nontowered airports.
• Part of a segmented circle.
• Indicates landing direction.
• Also indicates traffic pattern direction.

Memory trick: Circles and shapes tell the story of the airport's flow.

A Controlled Firing Area (CFA) is a special use airspace where activities are conducted that could be hazardous to nonparticipating aircraft. Unlike other special use airspaces, activities in a CFA are immediately suspended when an aircraft is detected, so no action is required by pilots.

• Special Use Airspace.
• Activities are hazardous if not controlled.
• Activities are suspended when an aircraft is detected.
• No pilot action required to enter.

Memory trick: Many Pilots Are Really Good Control Freaks (MOA, Prohibited, Alert, Restricted, Warning, CFA)

When a control tower uses a steady green light signal directed at an aircraft in flight, it means the pilot is 'Cleared to land.'

• Origin: ATC tower.
• Signal: Steady green light.
• Recipient: Aircraft in flight.
• Meaning: Cleared to land.

Memory trick: Green means Go, Red means Stop, Flashing means Caution or Return.

For VFR flight in Class E airspace below 10,000 feet MSL, pilots must maintain 3 statute miles visibility, 500 feet below, 1,000 feet above, and 2,000 feet horizontal from clouds.

• Applies to Class E airspace.
• Altitude is below 10,000 feet MSL.
• Minimums: 3 SM visibility, 500' below, 1000' above, 2000' horizontal.

Memory trick: Easy Echo, Elevation is Everything for Enroute.

A National Security Area (NSA) is airspace established for increased security of ground facilities. Pilots are requested to voluntarily avoid flying through these areas, and flight may be temporarily prohibited by regulation or NOTAM.

• Special Use Airspace.
• Purpose: Security of ground facilities.
• Pilot action: Voluntary avoidance requested.
• Can be temporarily prohibited by NOTAM.

Memory trick: SUA: Some Unusual Airspace. Know your rules!

For VFR flight in Class G airspace during the day, above 1,200 feet AGL but below 10,000 feet MSL, pilots must maintain 1 statute mile visibility and 500 feet below, 1,000 feet above, and 2,000 feet horizontal from clouds.

• Applies to Class G airspace.
• Altitude is during the day, above 1,200' AGL but below 10,000' MSL.
• Minimums: 1 SM visibility, 500' below, 1000' above, 2000' horizontal.

Memory trick: Ground, General, Giggles - visibility changes with height and light.

On a sectional chart, Class E airspace that extends down to the surface is depicted by a blue dashed line around an airport.

• Airspace Class: E.
• Vertical Extent: To the surface.
• Chart Depiction: Blue dashed line.
• Often found at airports without an operating control tower.

Memory trick: Colors and lines define the sky's zones.

A designated geographical point, usually marked on a sectional chart, where pilots can check the accuracy of their VOR receiver while airborne.

• Depicted by a 'V' shaped symbol pointing to a VOR on sectional charts.
• Includes the radial and distance from the VOR, and often the frequency.
• Used to ensure the VOR receiver is within acceptable accuracy limits (e.g., +/- 6 degrees).

Memory trick: The 'V' is for Verify, your VOR's accuracy.

The angular difference between true north and magnetic north at a specific location, indicated on aeronautical charts by isogonic lines.

• Expressed in degrees East or West.
• East variation means magnetic north is east of true north.
• West variation means magnetic north is west of true north.

Memory trick: East is Least (subtract from True to get Magnetic), West is Best (add to True to get Magnetic). For Magnetic to True, reverse it: East + True, West - True.

The total aircraft weight is the sum of the empty weight and all items comprising the useful load (pilot, passengers, baggage, usable fuel). This value must not exceed the maximum gross weight limits for safe operation.

• Total Weight = Empty Weight + Useful Load
• Useful Load includes pilot, passengers, baggage, fuel
• Must be less than or equal to maximum gross weight

Memory trick: Empty Plus People Plus Fuel

A fundamental navigation calculation to determine the time required for a flight, given distance and ground speed, or vice versa.

• Formula: Time = Distance / Speed; Speed = Distance / Time; Distance = Speed * Time.
• Always use ground speed for time calculations, not true airspeed.
• Ensure consistent units (e.g., nautical miles and knots).

Memory trick: Distance Divided by Speed is Time, so you're on your way, sublime!

Controlled airspace that extends from the surface to an altitude, typically 14,500 feet MSL, found around airports that do not have a control tower but require controlled airspace for IFR operations.

• Depicted by a blue shaded area on sectional charts.
• Requires two-way radio communication for IFR operations.
• VFR minimums are 3 SM visibility, 500 feet below, 1,000 feet above, 2,000 feet horizontal from clouds.

Memory trick: Magenta is for Charlie, Blue is for Bravo, Dashed is for Delta, Shaded is for Echo.

WCA is the angle an aircraft must be turned into the wind to maintain a desired true course. Ground speed is the speed of the aircraft relative to the ground, affected by true airspeed and wind.

• WCA compensates for wind drift to maintain desired course.
• Ground speed is TAS adjusted for headwind/tailwind components.
• Calculated using a flight computer (E6B) or advanced navigation systems.

Memory trick: Wind Changes Airspeed, Course, and Ground Speed.