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30 Cards in this Set

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What is the Atmospheric Turbulance & Icing Criteria Instuction?
3140.4C
What type of icing is formed by the instantaneous freezing of small, supercooled droplets; appearance rough, brittle, milky opaque ice?
Rime Icing
What type of icing is glossy, clear or translucent ice formed by relatively slow freezing of large supercooled droplets; it's also much more difficult to remove from aircraft wings?
Clear Icing
This is a combination of rime and clear icing; it forms when snow or ice particles become embedded in clear ice, very rough in appearance?
Mixed Icing
What are the 4 factors that influence the Rate of Accumulation on an aircraft?
1. Amount of liquid water
2. Droplet size
3. Airspeed
4. Aircraft size & shape
1. What 2 temperatures does icing generally occur between? 2. but can also occur at temperatures as cold as ___ in the upper parts of a CB?
1. Freezing level to -22C
2. -42C
Statiform Clouds what type of icing is found where temperatures range from 1C to -15C?
Rime Icing
Cumuliform Clouds what type of icing is found where temperatures are:
1. 0C to -8C?
2. -9C to -15C?
3. -15C to -22C?
1. Clear
2. Mixed
3. Rime
What 2 types of fronts are extremely hazardous as they may generate large areas of freezing rain/drizzle with severe clear icing associated with this?
Overrunning warm fronts & shallow cold fronts
Turbulance: Produces a slight variation in airspeed 5-14kts with a vertical gust of 5-19ft per second?
Light, CU
Turbulance: Aircraft experiences moderate changes in aaltitude but remains in positive control; small variations in airspeed of 15-24kts vertical Velocity 20-35ft per second?
Moderate, TCU
Turbulance: Aircraft experiences abrupt changes may be out of control for short periods, with airspeeds > or equal to 25kts, vertical velocity is 36-49ft per second?
Severe, in near TS
Turbualnce: Violently tossed about practically impossible to control, Structural damage may occur, > or equal to 25kts vertical velocity > or equal to 50ft per second?
Extreme, associated near rotor clouds, severe TS
What are the 4 types of Turbulance?
1. Thermal
2. Mechanical
a. Clear Air Turb (CAT)(moderate Intensity)
b. Mountain Wave (MV) (severe Intesity)
3. Wake Turbulance
4. Low-Level Wind Shear (LLWS)
Icing: Define the intensity for each:
1. Trace:
2. Light:
3. Moderate:
4. Severe:
1. rate accumulation slight greater than sublimation
2. Rate of accumulation may create a problem if flight is over 1 hr in environment; occational use of de-icing
3. Rate of accumulation is such that even short encounters become potentially hazardous; use de-icing possible diversion.
4. Rate such de-icing fails, Immediate diversion is required!
What is the Atmospheric Turbulance & Icing Criteria Instuction?
3140.4C
What type of icing is formed by the instantaneous freezing of small, supercooled droplets; appearance rough, brittle, milky opaque ice?
Rime Icing
What type of icing is glossy, clear or translucent ice formed by relatively slow freezing of large supercooled droplets; it's also much more difficult to remove from aircraft wings?
Clear Icing
This is a combination of rime and clear icing; it forms when snow or ice particles become embedded in clear ice, very rough in appearance?
Mixed Icing
What are the 4 factors that influence the Rate of Accumulation on an aircraft?
1. Amount of liquid water
2. Droplet size
3. Airspeed
4. Aircraft size & shape
1. What 2 temperatures does icing generally occur between? 2. but can also occur at temperatures as cold as ___ in the upper parts of a CB?
1. Freezing level to -22C
2. -42C
Statiform Clouds what type of icing is found where temperatures range from 1C to -15C?
Rime Icing
Cumuliform Clouds what type of icing is found where temperatures are:
1. 0C to -8C?
2. -9C to -15C?
3. -15C to -22C?
1. Clear
2. Mixed
3. Rime
What 2 types of fronts are extremely hazardous as they may generate large areas of freezing rain/drizzle with severe clear icing associated with this?
Overrunning warm fronts & shallow cold fronts
Turbulance: Produces a slight variation in airspeed 5-14kts with a vertical gust of 5-19ft per second?
Light, CU
Turbulance: Aircraft experiences moderate changes in aaltitude but remains in positive control; small variations in airspeed of 15-24kts vertical Velocity 20-35ft per second?
Moderate, TCU
Turbulance: Aircraft experiences abrupt changes may be out of control for short periods, with airspeeds > or equal to 25kts, vertical velocity is 36-49ft per second?
Severe, in near TS
Turbualnce: Violently tossed about practically impossible to control, Structural damage may occur, > or equal to 25kts vertical velocity > or equal to 50ft per second?
Extreme, associated near rotor clouds, severe TS
What are the 4 types of Turbulance?
1. Thermal
2. Mechanical
a. Clear Air Turb (CAT)(moderate Intensity)
b. Mountain Wave (MV) (severe Intesity)
3. Wake Turbulance
4. Low-Level Wind Shear (LLWS)
Icing: Define the intensity for each:
1. Trace:
2. Light:
3. Moderate:
4. Severe:
1. rate accumulation slight greater than sublimation
2. Rate of accumulation may create a problem if flight is over 1 hr in environment; occational use of de-icing
3. Rate of accumulation is such that even short encounters become potentially hazardous; use de-icing possible diversion.
4. Rate such de-icing fails, Immediate diversion is required!