Navmetoccomist 3140.4C

Front 1

What is the Atmospheric Turbulance & Icing Criteria Instuction?

Back 1

3140.4C

Front 2

What type of icing is formed by the instantaneous freezing of small, supercooled droplets; appearance rough, brittle, milky opaque ice?

Back 2

Rime Icing

Front 3

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?

Back 3

Clear Icing

Front 4

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?

Back 4

Mixed Icing

Front 5

What are the 4 factors that influence the Rate of Accumulation on an aircraft?

Back 5

1. Amount of liquid water
2. Droplet size
3. Airspeed
4. Aircraft size & shape

Front 6

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?

Back 6

1. Freezing level to -22C
2. -42C

Front 7

Statiform Clouds what type of icing is found where temperatures range from 1C to -15C?

Back 7

Rime Icing

Front 8

Cumuliform Clouds what type of icing is found where temperatures are:
1. 0C to -8C?
2. -9C to -15C?
3. -15C to -22C?

Back 8

1. Clear
2. Mixed
3. Rime

Front 9

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?

Back 9

Overrunning warm fronts & shallow cold fronts

Front 10

Turbulance: Produces a slight variation in airspeed 5-14kts with a vertical gust of 5-19ft per second?

Back 10

Light, CU

Front 11

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?

Back 11

Moderate, TCU

Front 12

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?

Back 12

Severe, in near TS

Front 13

Turbualnce: Violently tossed about practically impossible to control, Structural damage may occur, > or equal to 25kts vertical velocity > or equal to 50ft per second?

Back 13

Extreme, associated near rotor clouds, severe TS

Front 14

What are the 4 types of Turbulance?

Back 14

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)

Front 15

Icing: Define the intensity for each:
1. Trace:
2. Light:
3. Moderate:
4. Severe:

Back 15

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!

Front 16

What is the Atmospheric Turbulance & Icing Criteria Instuction?

Back 16

3140.4C

Front 17

What type of icing is formed by the instantaneous freezing of small, supercooled droplets; appearance rough, brittle, milky opaque ice?

Back 17

Rime Icing

Front 18

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?

Back 18

Clear Icing

Front 19

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?

Back 19

Mixed Icing

Front 20

What are the 4 factors that influence the Rate of Accumulation on an aircraft?

Back 20

1. Amount of liquid water
2. Droplet size
3. Airspeed
4. Aircraft size & shape

Front 21

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?

Back 21

1. Freezing level to -22C
2. -42C

Front 22

Statiform Clouds what type of icing is found where temperatures range from 1C to -15C?

Back 22

Rime Icing

Front 23

Cumuliform Clouds what type of icing is found where temperatures are:
1. 0C to -8C?
2. -9C to -15C?
3. -15C to -22C?

Back 23

1. Clear
2. Mixed
3. Rime

Front 24

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?

Back 24

Overrunning warm fronts & shallow cold fronts

Front 25

Turbulance: Produces a slight variation in airspeed 5-14kts with a vertical gust of 5-19ft per second?

Back 25

Light, CU

Front 26

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?

Back 26

Moderate, TCU

Front 27

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?

Back 27

Severe, in near TS

Front 28

Turbualnce: Violently tossed about practically impossible to control, Structural damage may occur, > or equal to 25kts vertical velocity > or equal to 50ft per second?

Back 28

Extreme, associated near rotor clouds, severe TS

Front 29

What are the 4 types of Turbulance?

Back 29

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)

Front 30

Icing: Define the intensity for each:
1. Trace:
2. Light:
3. Moderate:
4. Severe:

Back 30

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!