AV19: RSC & CRFI - DC Flashcards
(49 cards)
Define NOTAMJ
A special series NOTAM notifying the presence of hazardous conditions due to contaminants such as snow, ice, slush, on the manoeuvring area
Define Aircraft Movement Surface Condition Report (AMSCR)
The report that details the surface conditions for all aircraft movement areas including runways, taxiways and aprons
Define Canadian Runway Friction Index (CRFI)
The average of the runway friction as measured by a mechanical or electronic decelerometer and reported though the Aircraft Movement Surface Condition Report (AMSCR)
Can more than one NOTAMJ be in effect at a time for a given aerodrome?
NO
What is an RSC?
Runway Surface Condition,
Provides information describing runway condition
A NOTAMJ may be issued without a CRFI, however a CFRI cannot be issued without a _____
RSC
Who is responsible for providing the RSC and quantitative braking action information to NavCanada?
The Aerodrome Authority (Airport Operator)
If RSC/CRFI reports are communicated only verbally to NavCanada, what must be in place?
A formal agreement between NavCanada and the Aerodrome Authority
Who is responsible for cancelling the NOTAMJ?
Aerodrome Authority / Airport Operator
Unlike regular NOTAM, NOTAMJ are automatically distributed to the predetermined recipients, without revision and editing at the NOF. Therefore, Flight Service Specialists shall __________________________
be vigilant in making sure the proper format, abbreviations, and terminology is used.
Stopping distance increases ___ % on wet runways
15
Stopping distance increases ___ % on snow
50
Stopping distance increases ___ % on water deeper than 3mm
75
Stopping distance increases ___ % on ice
100
Take off distance increases by ___ % with 1.5cm of dry snow, or 0.8cm of slush on the runway
10
CRFI: Brakes are applied on the test vehicle at ______ intervals along the runway within _____ from each side of the centerline. The readings are averaged and reported as the CRFI number.
300m(1000ft) ,
10m(30ft)
How is the coefficient of friction affected by speed when the runway is packed snow or ice at a fixed temperature?
the CoF remains relatively constant with speed
Hydroplaning occurs as a function of: (3 things)
Water Depth,
Tire Pressure,
Speed
A non-rotating wheel will begin to hydroplane at a (lower/higher) speed than a rotating tire. (Select one and explain WHY)
LOWER
Water builds up under non-rotating wheel, increasing the hydroplaning effect.
What is hydroplaning?
Tires are separated from the runway by a thin layer of water, resulting in no braking or directional control abilities
In a hydroplane, the stopping distance may increase by as much as _____%
700%
An RSC Report must be provided when: (7 things)
- frost/snow/slush/ice on a runway,
- snow banks / drifts / windrows on or adjacent to runway,
- sand / ice control chem applied to or removed from a runway,
- cleared runway width falls below published,
- runway lights are partially/fully obscured,
- significant change to RSC including return to bare and dry,
- as per required minimum inspection frequency
What types of changes would be considered “significant change to RSC”? (7 things)
- coefficient of friction changes by 0.05 or more,
- depth of deposit changes greater than 20mm for dry snow, 10mm for wet snow, 3mm for slush,
- cleared width of rwy changes by 10% or more,
- type of deposit of extent of coverage changes, including return to bare and dry conditions,
- snow banks on one or both sides of runway height or distance from centerline changes,
- visibility of any runway lighting changes,
- any other conditions determined as significant by the aerodrome authority.
CRFI is to be reported whenever: (6 things)
- Ice / Frost on runway,
- Wet Ice on runway,
- Slush over ice on runway,
- ice control chem / sand on runway,
- compacted snow on runway,
- dry snow less than 2.5cm on runway
