2.
From five zero miles south of Albuquerque to three zero miles north of Phoenix, 1250Z, occasional moderate chop at Flight Level three three zero, DC8.
22.2 Duration and classification of intensity should be made using TBL GEN 3.5.11, Turbulence Reporting Criteria Table.
TBL GEN 3.5.11
Turbulence Reporting Criteria Table
Intensity Aircraft Reaction Reaction inside Aircraft Reporting Term.Definition
Light Turbulence that momentarily causes slight, erratic changes in altitude and/or attitude (pitch, roll, yaw). Report as Light Turbulence; 1 or Turbulence that causes slight, rapid and somewhat rhythmic bumpiness without appreciable changes in altitude or attitude. Report as Light Chop. Occupants may feel a slight strain against seat belts or shoulder straps. Unsecured objects may be displaced slightly. Food service may be conducted, and little or no difficulty is encountered in walking. Occasional.Less than 1/3 of the time. Intermittent.1/3 to 2/3. Continuous.More than 2/3.
Moderate Turbulence that is similar to Light Turbulence but of greater intensity. Changes in altitude and/or attitude occur, but the aircraft remains in positive control at all times. It usually causes variations in indicated airspeed. Report as Moderate Turbulence; 1 or Turbulence that is similar to Light Chop but of greater intensity. It causes rapid bumps or jolts without appreciable changes in aircraft altitude or attitude. Report as Moderate Chop. 1 Occupants feel definite strains against seat belts or shoulder straps. Unsecured objects are dislodged. Food service and walking are difficult. NOTE 1. Pilots should report location(s), time (UTC), intensity, whether in or near clouds, altitude, type of aircraft and, when applicable, duration of turbulence. 2. Duration may be based on time between two locations or over a single location. All locations should be readily identifiable. EXAMPLES: a. Over Omaha. 1232Z, Moderate Turbulence, in cloud, Flight Level 310, B707. b. From 50 miles south of Albuquerque
Severe Turbulence that causes large, abrupt changes in altitude and/or attitude. It usually causes large variations in indicated airspeed. Aircraft may be momentarily out of control. Report as Severe Turbulence.1 Occupants are forced violently against seat belts or shoulder straps. Unsecured objects are tossed about. Food service and walking are impossible.
Extreme Turbulence in which the aircraft is
violently tossed about and is to 30 miles north of Phoenix, 1210Z to
practically impossible to control. It 1250Z, occasional Moderate Chop,
may cause structural damage. Report as Extreme Turbulence. 1 Flight Level 330, DC8.
1 High level turbulence (normally above 15,000 feet ASL) not associated with cumuliform cloudiness, including thunderstorms, should be reported as clear air turbulence (CAT) preceded by the appropriate intensity, or light or moderate chop.
23. Wind Shear PIREPs
23.1 Because unexpected changes in wind speed and direction can be hazardous to aircraft operations at low altitudes on approach to and departing from airports, pilots are urged to promptly volunteer reports to controllers of wind shear conditions they encounter. An advance warning of this information will assist other pilots in avoiding or coping with a wind shear on approach or departure.
23.2 When describing conditions, the use of the terms “negative” or “positive” wind shear should be avoided. PIREPs of negative wind shear on final, intended to describe loss of airspeed and lift, have been interpreted to mean that no wind shear was encountered. The recommended method for wind shear reporting is to state the loss/gain of airspeed and the altitude(s) at which it was encountered.
EXAMPLE.
1.
Denver Tower, Cessna 1234 encountered wind shear, loss of 20 knots at 400.
2.
Tulsa Tower, American 721 encountered wind shear on final, gained 25 knots between 600 and 400 feet followed by loss of 40 knots between 400 feet and surface.
Pilots using Inertial Navigation Systems should report the wind and altitude both above and below the shear layer.
EXAMPLE.
Miami Tower, Gulfstream 403 Charlie encountered an abrupt wind shear at 800 feet on final, max thrust required.
Pilots who are not able to report wind shear in these specific terms are encouraged to make reports in terms of the effect upon their aircraft.
24. Clear Air Turbulence (CAT) PIREPs
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