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136 Cards in this Set

  • Front
  • Back

What are the two factors that distinguish between movement and non-movement areas?

Operational Control and FAA Design Standards

What is the difference between rigid and flexible pavement?

What does SEA use?

Rigid Does not compress under weight of load. Load is distributed over a large area of subgrade soil (concrete). Flexible compresses under weight of load pavement.

Flexible on shoulders (asphalt) and Rigid on taxiways and runways.

What are the advantages of rigid over flexible?

Rigid lasts longer than flexible. 30+ years compared to flexible which has a life of 5 – 15 years. However, it costs more.

What are the two major elements that contribute to pavement deterioration?

Effects of weathering and Weight loads imposed by aircraft

Explain the ACN-PCN method.

Aircraft Classification Number – Pavement Classification Number
If the ACN is equal to or less than the PCN, the aircraft can operate on the pavement without restriction

What is joint seal damage?

Any condition that enables soil or rocks to accumulate in the joints or any infiltration of water

How high in elevation can an abutting edge be to a paved area?

Cannot exceed three inches

What is skid resistance?

The ability of a pavement to provide a surface with the desired friction characteristics under all weather conditions.

Which method is most commonly used to reduce hydroplaning and loss of friction?

Grooving

What are the methods used for rubber removal on runways?

High Pressure Water Spray, Chemical Solvents, High velocity abrasive impact, Mechanical grinding

Which friction evaluation equipment provides a continuous graphic record of the pavement surface being tested?

CFME – Continuous Friction Measuring Equipment

What are the two types of decelerometers? Which is used only as a back-up and why?

Electronic and Mechanical
Mechanical is used as a backup because it requires longer runway downtime and does not provide automatic averages

What would a Mu value of 100 indicate?

Full contact between the tire and the pavement.

Describe unpaved areas:

Turf, gravel or dirt

What are the main reasons for the use of artificial turf at airports?

Mitigation of erosion caused by jetblast, poor drainage and vehicle loads

What are the RSA dimensions as defined by the FAA?

Centered on the runway varies in width from 120 feet to 500 feet. Length varies from 240 feet to 1000 feet.

Why would an airport install Engineering Material Arresting System?

Some (Class C and D) airports do not have 1,000 feet available beyond the runway end.

What are the TSA dimensions as defined by the FAA?

Centered on the taxiway centerline and varies in width from 49 feet to 262 feet.

What is the height restriction for frangible mounts in Safety Areas?

3 inches is the maximum height

What is a stopway?

A surface beyond the end of the runway which is suitable for use in lieu of runway to support an aircraft without causing structural damage.

What are declared distances?

Prescribed distances available for take off and landing when standard RSAs are not available and EMAS is not an option.

Does the TORA include the Stopway?

No. The Takeoff Run Available starts at the end of the stopway.

When is the LDA different from the TORA?

Landing Distance Available is different from Takeoff Run Available when there is a displaced threshold.

Describe unpaved areas:

Turf, gravel or dirt

What are the main reasons for the use of artificial turf at airports?

Mitigation of erosion caused by jetblast, poor drainage and vehicle loads

What are the RSA dimensions as defined by the FAA?

Centered on the runway varies in width from 120 feet to 500 feet. Length varies from 240 feet to 1000 feet.

Why would an airport install Engineering Material Arresting System?

Some (Class C and D) airports do not have 1,000 feet available beyond the runway end.

What are the TSA dimensions as defined by the FAA?

Centered on the taxiway centerline and varies in width from 49 feet to 262 feet.

What is the height restriction for frangible mounts in Safety Areas?

3 inches is the maximum height

What is a stopway?

A surface beyond the end of the runway which is suitable for use in lieu of runway to support an aircraft without causing structural damage.

What are declared distances?

Prescribed distances available for take off and landing when standard RSAs are not available and EMAS is not an option.

Does the TORA include the Stopway?

No. The Takeoff Run Available starts at the end of the stopway.

When is the LDA different from the TORA?

Landing Distance Available is different from Takeoff Run Available when there is a displaced threshold.\

Refers to the ability of a pavement to provide a surface with the desired friction characteristics under all weather conditions.

Skid resistance

Hyrdoplaning that occurs on any surface, generally at a high speed. A wave of water builds up in front of a rolling tire which allows the tire to ride on a cushion of water and lose contact with the runway surface.

Dynamic

Hydroplaning that occurs from the lubricating effect that results when a thin film of oil, grease, dirt, rubbber particles or a smooth runway combine with water or other liquid resulting in a slippery pavement.

Viscous

Hydroplaning causes by the rubber heat buildup beneath a tire footprint area due to friction. Heat cause the tire to revert to its uncured stated and form a seal that traps high pressure steam from the resultant friction.

Rubber reversion


Rubber can be removed from runways via these methods

1. High pressure water spray


2. Use of chemical solvents


3. High-velocity abrasive impact techniques


4. Mechanical grinding

Friction measuring equipment that provides a spot check of the pavement surface rather than continuous. Minimum of three braking tests are required in each zone to determine the average friction value for that zone. Average speed is 20 mph

Decelerometers (DEC)

Friction measuring equipment recommended for pavement surfaces covered with contaminants. Provides a continuous graphic record of the pavement friction characteristics with averages for each 1/3 zone of the runway length. May be conducted up to 40 MPH.

Continuous Friction Measuring Equipment (CFME)

What Mu reading number requires corrective action?

40 and below

Unpaved surfaces

turf, gravel or dirt

Main reasons for the use of artificial turf

1. Mitigate soil erosion


2. Minimize maintenance and management of turf


3. Control wildlife


4. Enhance visual aesthetics

Artificial turf can be used at these locations

1. adjacent to taxiway and apron pavement where the use of natural turf has caused soil erosion


2. where natural turf is impractical


3 where natural turf has high costs associated with its maintenance

Unpaved areas must be

1. Free of ruts, holes or depressions


2. Able to support an aircraft


90% overruns occur at exit speeds of


70 knots or less and within 1,000 feet of the runway end


A defined surface surrounding the RWY prepared for reducing the risk of damage to a/c in the event of an undershoot, overshoot or excursion from the RWY

RSA - Runway Safety Area

A defined surface alongside the TWY prepared for reducing the risk of damage to an a/c unintentionally departing the taxiway

TSA - Taxiway Safety Area

RSA is centered on the RWY centerline and varies in width from

120 - 500 feet

RSA varies in length from

240 to 1,000 feet

Aircraft approach category C and D airports must have how much RSA length?

600 feet prior to landing and 1,000 beyond the runway end

Porous cellular cement bed area at the end of a runway that deforms under the weight of a heavy a/c resulting in major drag and deceleration of the a/c.

EMAS - Engineered Material Arresting Sytems

Taxiway Safety Area is centered on the TWY centerline and varies in width from

49 - 262 feet

The airspace below 150 feet above the airport elevation and along the runway centerline that is required to be free of objects to provide clearance protection for landings and departures.

OFZ - Obstacle Free Zone

The airspace above the runway centerline and extending 200 feet beyond each end of the runway

Runway Obstacle Free Zone

The airspace above the runway centerline (runways have approach lighting system). Begins 200 feet of the runway threshold and extends 200 feet beyond the last light in the ALS. Width is the same as the ROFZ.

Inner approach OFZ

The airspace above the surfaces located on the outer edges of the ROFZ and the inner-approach OFZ. Applies to runways with minimums lower than 3/4 statute mile

Inner-transitional OFZ

Volume of airspace above an area beginning at the rwy threshold, at the threshold elevation and along the centerline. 200 ft long. 800 ft wide. Applies when ceiling is less than 3/4 mile and a/c is on final approach within 2 miles of the threshold.

Precision OFZ

An area on the ground centered on the runway to enhance a/c safety by having the area free of objects unless fixed by function.

ROFA - Runway Object Free Area

Trapezoidal in shape and centered on runway centerline. Designed to enhance the protection of people and property on the ground. 200 feet beyond the runway end. Otherwise two are required

RPZ - Runway Protection Zone

Rectangular area beyond the rwy end centered on the centerline and as wide as the rwy prepared for use in lieu of rwy during an aborted takeoff

Stopway

Rectangular area beyond end of the rwy cleard for use to satisfy takeoff distance requirements. Possibility of an engine out operation. Increases the allowable a/c takeoff weight without increasing runway length.

Clearway

The runway length declared available for the ground run of a/c taking off

TORA - Take Off Run Available

The TORA plus the length of any remaining runway or clearway beyond the far end of the TORA.

TODA - Take Off Distance Available

The runway plus stopway length declared available and suitable for the acceleration and deceleration of a/c aborting a takeoff

ASDA - Accelerate Stop Distance Available

The runway length declared available for a landing airplance

LDA - Landing Distance Available

Runway without an existing or planned straight-in instrument approach procedure. Approach and landing made solely under VFR conditions.

Visual

VFR meteorological conditions

Minimum of 1,000 ft ceiling and 3 miles visibility

Runway with only horizontal navigational guidance.

Non-precision

A specified altitude or height in a non-precision approach which descent must not be made without the required visual reference

MDA - Minimum Descent Altitude

The point in an approach at a specified height or altitude at which a missed approach must be initiated if the required visual reference to continue the approach has not been acquired

Decision Point

Runway with both vertical and horizontal approach guidance provided by ILS, PAR or WAAS or GBAS.

Precision

Ground based instrument approach system that provides precision guidance to an aircraft approaching and landing on a runway.

ILS - Instrument Landing System

A type of radar guidance system designed to provide lateral and vertical guidance to an a/c for landing until the landing threshold is reached.

PAR - Precision Approach Radar

System consisting of 25 ground reference stations positioned across the US where data is collected and differential messages are broadcast.

WAAS - Wide Area Augementation System

Airport Marking:


Two proven techniques that help airport operators enhance conspicuity of surface markings

1. Black borders on light colored pavement


2. Glass beads

What bead types does the FAA recommend for rwy holding position markings?

Type III and Type IV

Marking used to identify the runway end consisting of one or two numbers.

Runway Landing Designator Marking

Runway Centerline length specifications

Each stripe is 120 feet in length with 80 ft. gaps

Runway Centerline widths:

Precision runway: 36 inches


Non-precision runway: 18 inches


Visual: 12 inches

A pattern of longitudinal stripes of uniform dimensions


Where does the marking start?

Runway threshold marking


Starts 20 feet from the actual starting point of the runway threshold.

Runway Threshold Marking deimensions:

Longitudinal stripes are 150 ft long


Spaces are 5.75 feet


Stripes nearest the centerline are space 11.5 feet apart.

This marking is white and generally begins 1,020 feet from the runway threshold.

Runway Aiming Point

Aiming Point Marking dimensions

150 ft. in length for runways at least 4,200 feet


100 ft. in length for runways less than 4,200 feet

This marking is on a precision runway at 500 ft increments

Runway Touchdown Zone Marking

What is the no marking zone established for Touchdown Zone Markings?

900 feet of no markings to preserve 1800 feet of unmarked surface so pilots don't confuse these markings with the opposite approach

This marking consists of two parallel stripes on each edge of the usable runway

Runway edge marking

Runway side stripe dimensions

36 inches wide for runways 100 feet wide or more


18 inches on smaller width runways

This marking is a rectangular bar located perpendicular to the runway centerline.

Runway Displaced Threshold Marking

These markings identify paved blast pads, stopways and EMAS

Chevron Markings

This marking is used only in conjunction with the runway edge marking

Runway shoulder marking

The purpose of these markings is to prevent aircraft and vehicles from entering into critical areas with runways and nav aids

Holding Position Markings

Holding Position Marking - Case 1

Taxiing on a runway, a/c will need to hold short of an intersecting runway.

Holding Position Marking - Case 2

Land and Hold Short Operations

Holding Position Marking - Case 3

Taxiing on a taxiway, a/c will need to hold short of a runway

Holding Position Marking - Case 4

Taxiing on a taxiway, a/c will need to hold short of the ILS/MLS critical areas

Holding Position Marking - Case 5

Taxiing on a taxiway, a/c will need to hold short before entering a POFZ critical area

Holding Position Marking - Case 6

Taxiing on a taxiway, a/x will need to hold short of a taxiway/taxiway intersection

Pattern A Marking

Runway Holding Position Marking

Pattern B Marking

ILS/MLS or POFZ Marking

Pattern C Marking

Intermediate Holding Position Marking

All taxiways that intersect a runway must have:

1. Surface Painted Runway Holding Position Marking


2. Enhanced Taxiway Centerline Marking

An increased area of pavement around turning points on the runway and taxiway to ensure a/c do not veer off the pavement while turning

Fillet

The standard methodology for painting taxiway centerlines in taxiway intersections

Cockpit over centerline

To reduce taxiway excursions airport operators should:

1. Construct standard fillets


2. Paint centerlines according to cockpit over centerline design.

When does the taxiway marking continue across all runway markings?


What are the exceptions?

Low Visibility Operations


Except the rwy designation markings and the threshold bars (unless required by SMGCS plan)

How are taxiways marked that intersect runways in areas other than the runway end?

TWY centerline marking curves onto the runway and extends parallel to the runway centerline for 200 feet beyond the point of tangency or at the point of displaced threshold bar.

Taxiway centerlines are enhanced for how many feet prior to the runway holding position?

150 feet

This marking is used to delineate the taxiway edge from the shoulder and not intended for use by pilots.

Continuous taxiway edge marking

This marking is used where there is an operational need to define the edges of a taxi route and permits pilots to cross this surface marking

Dashed taxiway edge markings

This marking is designed to supplement signage by alerting pilots and vehicle drivers of an upcoming runway.

Surface Painted Holding Position Signs

These markings are used to provide directional guidance at an intersection when it is not possible to provide a taxiway direction sign or at troublesome taxiway intersections

Surface painted taxiway direction signs

These markings are used to enable pilots and ground vehicle operators to identify the taxiway upon which they are located.

Surface painted taxiway location signs

These markings are used to assist pilots in locating their assigned terminal gate.

Surface painted gate designation signs

These markings are used to assist pilots in locating their position along the edges of a large continuous apron. Useful for identifying both the entrances and the exits along the terminal.

Surface Painted Apron Entrance Point Sign or Ramp Spots

These markings are designed to assist pilots with confirming holding points and reporting their location while taxiing during periods of low visibility operations.

Geographic Position Markings

These markings are used to facilitate the local ramp tower in movement of a/c and vehicles to designated areas of ramps between non movement and movement areas

Ramp Control Markings

This is where pilots are able to check their a/c instruments with the VOR signal.

VOR Receiver Checkpoint

The runway displaced threshold marking includes:

Runway threshold bar marking


arrow markings


Runway demarcation bar marking

This marking is located on the blast pad, stopway or EMAS prior to the runway threshold

Chevrons

This marking should not be established at distances less than one-half mile from the VOR

VOR Receiver Checkpoint Marking

Physical removal of markings is achieved by:

Water blasting


Shot blasting


Sand blasting


Chemical Removal

At airports with an ATCT, vehicles and a/c are required to hold at these signs unless cleared by ATCT.

Mandatory Instruction Signs

Holding Position Signs


No Entry Signs

Mandatory Instruction Signs

The purpose of these signs is to identify the taxiway or runway that an a/c or vehicle is located.

Location Signs

The purpose of these signs is to identify the boundary of the RSA/OFZ or ILS Critical Area for a pilot exiting the runway.

Boundary Signs

These should not be collocated with holding position signs or boundary signs

Direction Signs

These signs should not be installed between the holding position marking and the runway

Direction Signs

This sign indicates the end of a taxiway

Taxiway Ending Marker

These signs indicate the general direction to a remote destination.

Destination Signs

Standard Highway Stop Signs on the airfield

Vehicle Roadway Signs

These signs are used to provide distance remaining information to pilots during takeoff and landing operations

Runway Distance Remaining Signs


Not affected by declared distances

This sign is only used in the take-off direction on unpaved runways less than 3,000 feet where both ends of the runway are not readily visible.

One-half Distance Remaining Sign

The oldest lamp type in use with either a bayonet or screw type insertion into the fitting.

Incandescent

The longevity of this bulb is primarily based on the temperature generated.

Incandescent

These bulbs produce a much hotter filament and the quartz lens is better able to withstand the heat.

Tungsten-halogen


Quartz lamp