Technical Flashcards
What are the 3 types of hydroplaning?
Viscous - When oil/debris combines with water on a runway, forming an impenetrable layer of liquid your tires can’t break through. Especially problematic on smooth asphalt runways.
Dynamic - when water lifts your wheels off the runway. This usually happens when a wedge of water builds up in front of your tires. Loss of traction or braking.
Reverted Rubber - when your tires lock up, the rubber begins to melt, and trapped water under the tire turns into steam. When it happens, you’re riding on steam, and melting your tires in the process.
What is the airspeed restriction in/around class C/D airspace?
200 KIAS (230 mph) at or below 2,500 feet above the surface, within 4 nautical miles of the primary Class C or Class D airport
What does the circle with a cross symbol represent in the airport plan view?
Airport Reference Point (ARP)
- Center point of an airport, or Geometric center of all usable runways (calculated using coordinates at the ends of all runways)
A crew-member must breathe oxygen above how many feet?
(b) Pressurized cabin aircraft.
- Above 250 need 10 min supply avail. for each occupant
- Above 350 one pilot at the control must wear/use at all times…except
- Below 410 if there are 2 pilots at the control and each is provided a quick don mask (placed on face with 1 hand within 5 seconds, supplying and secured)
What is your clearance limit when cleared for the approach and then you lose comms?
The published hold on the missed.
3 phases of a Thunderstorm:
Cumulus: Updrafts, building clouds, no precip.
Mature: Precipitation begins to fall, unstable air intensifies
Dissipating: Updrafts slow, Anvil forms at top of storm cloud, downdrafts replace updrafts below storm cloud
When do you need an alternate airport?
121.619 - Domestic operations: must list at least 1 alternate airport for each destination airport in the dispatch release. When wx at both the first destination and alternate airport are marginal, at least one MORE alternate must be designated. UNLESS 123 rule!
- 621 - Flag operations: must list at least 1 alternate airport for each destination airport UNLESS -
- the flight is less than 6 hours and 1 hour before/after ETA at the destination airport indicate:
- ceiling of 1,500’ above the lowest circling MDA if required, or 1,500’ above lowest IAP minimum OR 2,000’ above the airport elevation (whichever is greater)
- visibility at least 3 miles, or 2 miles greater than the lowest applicable IAP minimums (whichever is greater)
What is Mach tuck?
When an aircraft enters a potentially unrecoverable nose dive.
- Aircraft transitions through Transonic Region (M0.75-M1.2)
- You reach MCrit (1st molecule of air reaches super sonic speed, creating shockwaves between supersonic and subsonic air molecules)
- As shockwaves become larger, the aerodynamic center on the control surface moves AFT
- Air flowing from supersonic region, through the shockwaves, to subsonic region separates and becomes turbulent, and causes a loss of lift
- To avoid nose-down “Tuck” you must apply more back pressure….but your elevator is now useless as it sit in aerodynamically dead air
What is the most dangerous type of precipitation?
Supercooled Water Droplets in clouds.
Freezing rain/hail -
Can occur along a warm front where a warm air mass overruns a cold air mass.
What is the airway width communication range guaranteed by MOCA?
Airway width is 4 miles either side, MOCA does not have any guarantee on communication.
- (MOCA) The lowest published altitude in effect between radio fixes on VOR airways, off-airway routes, or route segments that meets obstacle clearance requirements for the entire route segment and that assures acceptable navigational signal coverage only within 22 NM of a VOR
Define V1
The MAX speed in the TO at which the pilot must take the FIRST ACTION TO STOP the airplane within the accelerated stop distance, or the MINIMUM speed in the TO following a failure of the critical engine at Vef at which the pilot CAN CONTINUE the TO and achieve the required height above the TO surface within the TO distance
What is coffin corner?
The altitude(s) just below where Vs and MMO of an aircraft meet.
True Airspeed (and TRUE Stall Speed) increase with altitude, & the speed of sound decreases as temperature decreases.
When is the ILS Critical area is in effect ?
- When instrument approaches are being conducted
- Vis is 2 miles or less and/or
- Ceiling 800 feet or less
What color are runway Centerline lights?
White until the last 3,000 feet of the runway.
The white lights begin to alternate with red for the next 2,000 feet, and for the last 1,000 feet of the runway, all centerline lights are red.
What does pressing the fire button do?
Activates shutoff valves for fuel and hydraulics, trips generator off via generator relay, arms fire bottles
What is the max takeoff weight of the CRJ-200, 700 and 900?
CRJ 200 - 53,000 lbs
CRJ 700 - 75,000 lbs
CRJ 900 - 84,500 lbs
What is the DH?
Decision Height. The altitude AGL at which a decision must be made to continue on an ILS or execute the missed approach.
What would you do if you hear a loud bang and lose power after V1 with over half an 11,000 ft runway left?
Continue the takeoff, fly the airplane, and follow the appropriate procedure. Declare emergency with ATC.
What would you do if the Captain continued below minimums?
Call out “below minimums” and ask if they have the runway. If no confirmation, call the missed approach and go around.
What is exemption 3585?
- Allows operations when forecast’s conditional remarks (BECMG, PROB, TEMPO) are below dispatch minimums.
- Under the terms of the exemption, the flight will be required to have not one, but two alternates.
Centerline lights are what colors?
White with the last 3,000 feet alternating red and white and the last 1,000 feet red
What is Dutch Roll? How do you counteract Dutch roll?
—A combination of rolling and yawing oscillations that normally occurs when the dihedral effects of an aircraft are more powerful than the directional stability.
Coordinated opposite rudder in the direction of the roll.
Yaw damper, or opposite control inputs to counteract.
What type aircraft is susceptible to dutch roll?
Swept Wing…
Max airspeed Below 10,000?
- 117 - 250 Knots (288 mph) Indicated unless otherwise authorized
(d) If the minimum safe airspeed for any particular operation is greater than the maximum speed prescribed in this section, the aircraft may be operated at that minimum speed.
Max airspeed Above 10,000?
91.817 - Not allowed to exceed Mach 1 (~666 knots)
Max airspeed In/Around class B airspace?
Below 10,000 (in B) still no faster than 250 KIAS.
BENEATH Class B airspace, or in a VFR corridor through Class B, no faster than 200 knots (230 mph)
What are the first 2 layers of the atmosphere?
Troposphere SL to about 30,000’ or 40,000’
Tropopause (traps moisture and associated wx)
Stratosphere extends from Tropopause - 160,000’
What is Vef
The speed at which the critical engine is assumed to fail during TO
What is MMO
Max Mach Operating Number (fixed number). MMO should prevent you from reaching MCrit (Critical Mach Number, aka the speed of sound)
Takeoff minimums JEPP
10-9 or 10-9A if larger airport!
At the bottom of the page, under Takeoff & Alternate minimums.
91.175/121.651: What lets you descend 100’ TDZE? What lets you land?
- Continuous position to landings
- Have required minimum flight visibility
- Be able to distinctly identify one of the approved visual references for the runway (often called the “runway environment”)
1) The ones that let you descend down to 100’ above the TDZE:
- CAT I & II white approach lighting system and nothing else.
2) The ones that let you LAND (below 100’ above TDZE):
- Red terminating bars used on ALSF-1 and ALSF-2 systems
- Runway, threshold or REILs
- Visual GS indicator
- TDZ/Runway markings
What is the TDZE?
The highest point on the first 3000 feet of the runway you’re shooting an approach on.
What is the D stand for in D-ATIS?
Digital ATIS that is accessible through ACARS (aircraft communication addressing and reporting system)
Types of Icing? Effects on flight?
Clear - glossy, clear, or translucent ice formed by the
relatively slow freezing of large, supercooled water droplets. (favors warmer temps)
Rime - rough, milky, and opaque ice formed by the instantaneous freezing of small, supercooled water droplets after they strike the aircraft. (favors colder temps)
Mixed - Combo of both. Ice pellets can become embedded.
Drag, loss of lift. stall speed increases.
Types of Anti-Ice and De-Ice Fluid?
Weeping wing/prop TKS (Tecalemit-Kilfrost-Sheepbridge Stokes) fluid - Drips/sprays an ethylene glycol based liquid out of thousands of tiny holes/windshield nozzles.
Type I - Unthickened, high Propylene glycol and low viscosity (used as DE-ice mostly, orange in color)
Type II/III - Thickened, lower glycol in concentrated form and higher viscosity but still will fly off surfaces of aircraft with rotation speed below 100kts. (Light yellow)
Type IV - Thickened, longer holdover time than Type II. (Anti-ice mostly, Green in color) must be put on a clean, dry surface.
Swept Wing advantages and disadvantages:
- Allows for a faster speed before MCrit is reached when compared to a straight wing.
- Low speed buffet can begin at tips and work into roots creating a “deep stalls”
- High Speed Buffet flow separation develops first at the wing root, then progresses gradually outward toward the wing tips.
What is a Holdover Time (HOT) and when does it start?
- the estimated time for which an anti-icing fluid will prevent the formation of frost, ice, or accumulation of snow on the protected surfaces
- HOT begins at the start of the anti icing operation. If a two-step operation is used, then it begins at the start of the final (anti-icing) step
When do you need a TAKEOFF alternate and how close does it need to be?
- Weather is at or above TO minimums but are below authorized IFR LANDING minimums unless there is an alternate airport within 1 hour’s flying time (at normal cruising speed, in still air) of the airport of departure.
- Aircraft having two engines. Not more than ONE HOUR from the departure airport at normal cruising speed in still air with one engine inoperative.
Minimum altitude for turbine aircraft to enter Class D airspace
1,500’ above airport elevation
Read METAR/TAF with RVR
R18R/0700V1000T
RVR1600 = __sm vis.
Runway Visual Range - the horizontal distance you can expect to see down a runway
RVR for Runway 18R has varied over the last 10 mins between 700’ and 1000’
RVR1600 = 1/4sm vis.
Brief approach into large airport DFW or LGA
get it girl
Define V2
Takeoff Safety Speed.
- The speed at which the aircraft may safely climb with OEI!!
- Maintain this speed until you reach One Engine Out Acceleration Altitude.
Weather mins for Visual Approach?
1,000’ ceilings, 3sm vis, clear of clouds
Holding Airspeed Limitation:
MHA-6,000' = 200 6,001'-14,000' = 230 14,001'+ = 265 (and timed inbound leg 1:30 sec)
Decode:
TAF CYDP 171938Z 1720/1723 33018G28KT P6SM -SHRA FEW025 OVC080
BECMG 1720/1722 30012G22KT
RMK NXT FCST WILL BE ISSUED AT 180945Z=
In this example TAF we can see the BECMG period forecasted for the 17th of this month, between 20-22z. The winds will change from 330º at 18 gusting 28 knots to 300º at 12 gusting 22 knots.
If the wind change in this BECMG period is an improvement for an aircraft’s crosswind limit, the wind change is considered to take effect at 22z.
If the wind change in this BECMG period is a deterioration for an aircraft’s crosswind limit, the wind changes is considered to take effect at 20z.
Decode:
FM172300 01008KT 6SM BR OVC006 TEMPO 1723/1806 3SM -DZ BR BKN003 OVC006
FM180600 04005KT 3SM BR OVC003 TEMPO 1806/1813 OVC006
In the first TEMPO of this example TAF, temporarily between 23z and 06z the visibility will drop from 6 miles to 3 miles, light drizzle and the ceiling will drop from 600′ to 300′. If the ceiling is below required alternate minima, this aerodrome could not be used as an alternate during this period.
In the second TEMPO of this example TAF, temporarily between 06z and 13z the ceiling will climb to 600′. Normally, an aerodrome with a forecasted ceiling of 600′ can be used as an alternate, if the aerodrome has a usable ILS approach, but since the 600′ is in a TEMPO during a forecast ceiling of 300′, credit can not be taken.
Decode:
5SM -SHRA BR SCT020 BKN040 PROB30 1721/1803 2SM RA BR OVC007
In this TAF the PROB30 between 21z and 03z is 2 miles visibility, rain, mist and a ceiling of 700′.
Since these values fall in a PROB and they don’t fall lower than the landing minima, Dawson Creek is still a legal alternate.
Dihedral effects
Angular deflection up from root to tip. Aids in maintaining lateral (ROLL) stability.
Lack of stability along the longitudinal axis
Carburetor Icing?
Caused by the venturi in the carbs.
Fix is to turn on carb heat to bring warm air from outside a cylinder in to melt the ice.
Engine will initially run rough when carb heat is activated.
“Descend Via” a STAR means:
Abbreviated clearance
Requires compliance with:
- Lateral path
- Speed restrictions
- A pilot-discretion descent to comply with published altitude restrictions until descending to the ‘Bottom Altitude’
- If cleared to a waypoint depicted on a STAR, you can descend from a previously assigned altitude at pilot’s discretion to the altitude depicted for the STAR waypoint.
- If there is no crossing height published for the waypoint you were cleared to, ATC must issue one.
MEAs/MOCAs are NOT considered “altitude restrictions” for “Descend Via” purposes
AIM 5-4-1a
Using RVR in real life:
Approach minimums are 1045/24…
1045’ is Decision Altitude
24 is short for RVR of 2400’ RVR (1/2 sm VIS)
What are STANDARD instrument takeoff minimums for departure procedures based off of?
- Climbing at 200ft/NM
- Being at least 35’ AGL when crossing the Departure End of Runway (DER)
- Turn after 400’ AGL
152’ per NM obstacle clearance surface - then they issue the ODP adding the extra 48’
1/4SM R18R/M0600FT FG
M = vis is less than lowest reportable value.
- Vis is less than 600’
1/4SM R27L/P6000FT FG
P = vis is greater than highest reportable value.
- Vis is greater than 6000’
FM in a TAF:
FM0100 SKC
Rapid change/The new main forecast for that time frame.
- After 0100Z sky clear
What is a TAF?
what does = mean at the end of some?
Forecasts that are issued 4 times a day, covering area 5sm around an airport.
Valid periods are stated either 24 or 30 hours.
= means the end of the individual TAF
BECMG in a TAF:
OVC012 BECMG 1416 BKN020
Gradual change at some point over a 2 hour period.
TEMPO in a TAF:
4SM HZ TEMPO 0006 2SM BR HZ
Change that will last LESS THAN 1 HOUR.
- Visibility 4 in haze with occasional visibility 2 in mist and haze between 0000Z and 0600Z.
PROB in a TAF:
PROB40 2102 1/2SM +TSRA
30-50% chance of happening.
- Chance between 2100Z and 0200Z of 1/2 SM visibility, thunderstorm, heavy rain.
MI =
Shallow
BC =
Patches
DR =
Low Drifting
PR =
Partial
PL =
Pellets
GR/GS =
HAIL/Small Hail
UP =
Unknown Precipitation
PO =
Well developed dust/sand whirls
SS =
Sand storm
DS =
Dust storm