Squall Line | Honeywell 880 guide

PRIMUSr 880 Digital Weather Radar System

To find a safe and comfortable route through the precipitation area, study the radar image of the squall line while closing in on the thunderstorm area. In the example shown in figure 5- 27, radar observation shows that the rainfall is steadily diminishing on the left while it is very heavy in two mature cells (and increasing rapidly in a third cell) to the right. The safest and most comfortable course lies to the left where the storm is decaying into a light rain. The growing cell on the right should be given a wide berth.

	AREAS OF MAXIMUM TURBULENCE	GROWING
	AREAS OF MAXIMUM TURBULENCE	CELLS
		CELLS
DECAYING
CELLS	MATURE CELLS

OUTLINE OF RAIN AREA VISIBLE TO RADAR

BEST DETOUR

AD- 12058- R1@

Squall Line

Figure 5- 27

Radar Facts	A28- 1146- 102- 00
5-34

Image 84

Honeywell 880 manual Squall Line

Contents

Page PRIMUSr 880 Digital Weather Radar System Pilot’s Guide Table of Contents Appendices Federal Aviation Administration FAA Section Radar FactsMaximum Permissible Exposure Level Honeywell Product Support Federal Aviation Administration FAA Advisory Circulars List of IllustrationsEnhanced GROUND--PROXIMITY Warning Radar Beam Illumination High Altitude Rain Coming From Unseen Dry Hail List of Tables Introduction A28- 1146- 102 System Configurations PRIMUSâ 880 Configurations Efis only Configuration Dual Control Mode Truth Table Left Right Controller Left Side Right SideRTA Mode Model Unit Cockpit Mounted Options Remote Mounted EquipmentPrimusr 880 Weather Radar Equipment List Typical PRIMUSâ 880 Weather Radar Components WI- 880 Weather Radar Indicator Operation Operating ControlsTypical PRIMUSâ 880 Digital Weather Radar Display Range 3 Gmap Calibrated Gain Rainfall Rate Color In/hr Mm/hr Rainfall Rate Color Coding Fsby Forced Standby TGT Target Selected Range Minimum Target Target Range Depth NM STB Stabilization TRB Turbulence RangeAZ Azimuth SCT Scan Sector BRT Brightness or BRT/LSS Lightning Sensor System Tilt Gain WC- 880 Weather Radar Controller Configurations WC- 880 Weather Radar Controller Operation Tilt Radar SLV LSS Gain Radar EFIS/MFD PRIMUSr 880 Digital Weather Radar System Maximum Permissible Exposure Level Mpel Sect Scan Sector TRB Turbulence Detection Range SLV Slave LSS Lightning Sensor System Option WC- 884 Weather Radar Controller Operation WC- 884 Weather Radar Controller BRT BrightnessTGT Target Alert RCT Rain Echo Attenuation Compensation Technique Tilt Mode Rainfall Rate Color In/hr Mm/hr PRIMUSr 880 Digital Weather Radar System Hidden Modes Forced Standby Override Roll Offset Roll GainPitch Offset Pitch Gain PRIMUSr 880 Digital Weather Radar System Preliminary Control Settings Step ProcedurePrimusr 880 Power--Up Procedure Cont Normal Operation Output Power is Radiated in Test Mode PRIMUSâ 880 Power- Up ProcedureIndicator Test Pattern 120 Scan WX With Text Fault Enabled Efis Test Pattern Typical 120 Scan Shown WX 319 Radar Mode Weather WI--880 Indicator Test Pattern With Text Fault EnabledStandby REV Radar Mode Ground Mapping Test Mode 4-8 blank Radar Facts Radar Operation Aircraft Heading PRIMUSr 880 Digital Weather Radar System Sea Returns Tilt Management Radar Beam Illumination High Altitude Inch Radiator Radar Beam Illumination Low Altitude Inch Radiator PRIMUSr 880 Digital Weather Radar System Range Scale Line Tilt Limited Ideal Tilt Angle Earth’s Curvature Convective Thunderstorms Unaltered Tilt Proper Tilt Technique Tilt Management With Heading Changes Fast Developing Thunderstorm Low Altitude Tilt Management Antenna Size and Impact on Tilt Management Rules of Thumb Altitude Compensated Tilt ACT Manual Tilt at Low Altitudes Dynamic Error Accelerative ErrorStabilization Pitch and Roll Trim Adjustments Pitch and Roll Trim Adjustments Criteria Stabilization In Straight and Level Flight Check Procedure Stabilization PrecheckLevel Flight Stabilization Check Symmetrical Ground Returns Ground Return Indicating Misalignment Upper Right Stabilization in Turns Check Procedure Ground Return Indicating Misalignment Upper LeftRoll Stabilization Check Roll Stabilization Inoperative In- flight Roll Offset Adjustment Procedure 23. The radar unit is in the roll offset Push the Stab STB button to go to the next menu pitch offset Roll Offset Adjustment Display Final Pitch Offset Adjustment Pitch Offset Adjustment Procedure Roll Gain Adjustment Roll Gain Adjustment Pitch Gain Adjustment Pitch Gain Adjustment Interpreting Weather Radar Images Weather Radar Images PRIMUSr 880 Digital Weather Radar System Radar and Visual Cloud Mass Squall Line Weather Display Calibration Display Levels Related to VIP Levels Typical LOW Variable Gain Settings can Eliminate Hazardous Targets Variable Gain ControlRain Echo Attenuation Compensation Technique React PRIMUSr 880 Digital Weather Radar System With React Selected ReactReact on and OFF Indications Shadowing Turbulence ProbabilityDo not FLY Into the Shadow Behind the Cell Probability of Turbulence Presence A Weather Target Turbulence Detection Theory Areas of Turbulence can not Always be Detected by the Radar Total Return Vector No Turbulence Turbulence Detection Operation TurbulentWeather Display With Turbulence PRIMUSâ 880 Digital Weather Radar can only Detect Hail Size Probability Turbulence Levels From Airman’s Information Manual Spotting Hail Hail Size Probability Rain Coming From Unseen Dry Hail Familiar Hailstorm Patterns Overshooting a Storm Short- and Long- Blind Alley Azimuth Resolution Azimuth Resolution in Weather Modes Radome Weather Avoidance Weather Display Do not Leave the Radar in Variable GAIN. SIG Nificant Weather MAY not be DisplayedDRY Hail can be Prevalent AT Higher Alti Tudes WITHIN, NEAR, or Above Storm Cells Severe Weather Avoidance Procedures 10 3. Interaction With Other Storms. a thunderstorm that is Step Procedure Configurations of Individual Echoes Northern Hemisphere Storms Situated Behind Intervening RainFall MAY be More Severe than Depicted on Display Typical Hook Pattern Avoid V- Notch by 20 Miles Notch Echo, Pendant Shape Avoid Pendant by 20 Miles Classic Pendant Shape Avoid Steep Rain Gradients by 20 Miles Rain GradientsAvoid ALL Crescent Shaped Echoes by 20 Miles Line Configurations Crescent Shape Avoid Line Echo Wave Patterns Lewp by 20 Miles Line Echo Wave Pattern Lewp Avoid BOW- Shaped Line of Echoes by 20 Miles Bow- Shaped Line of Thunderstorms Additional Hazards Turbulence Versus Distance from Storm CoreTurbulence Versus Distance from Storm Edge Ground Mapping Ground Mapping Display Tilt Setting for Maximal Ground Target Display Inch Radiator Range Scale Maximum Permissible Exposure Level Mpel Mpel Boundary In- Flight Troubleshooting Test Mode With Text Faults Enabled Fault Data Fields Field No Description 315 Fault Code and Text Fault Relationships Text Faults Cont IO Fpga REG Text Faults Describes the pilot messages Pilot Messages Honeywell Product Support Customer Support Honeywell Aerospace Online Technical Publications Web SiteCustomer Response Center CRC Abbreviations Abbreviation Equivalent FLTPLN, FP RCT, React Federal Aviation Administration FAA Advisory Circulars CancellationAppendix a Purpose Background Precautions GeneralBody Damage Combustible Materials Subject Thunderstorms GeneralHazards Squall Lines Tornadoes Turbulence Schematic Cross Section of a Thunderstorm Icing Hail LOW Ceiling and VisibilityEffect on Altimeters Lightning Weather Radar DO’S and DON’TS of Thunderstorm Flying PRIMUSr 880 Digital Weather Radar System Relationship Between Turbulence and Reflectivity Relationship Between Turbulence and AltitudeTurbulence and Echo Intensity on NWS Radar WSR Turbulence in Relation to Distance from Storm Core Turbulence in Relation to Distance from the Storm Edge Turbulence Above Storm TopsTurbulence below Cloud Base Maximum Storm Tops Hail in Thunderstorms Extrapolation to Different Climbs USE of Airborne Radar Enhanced Ground-Proximity Warning System Egpws Appendix BSystem Operation Egpws Controls Push Button Controls Annunciators Related Egpws System Operation Egpws Operation Egpws Display Figure B--1 Egpws Test Index Index TGT target, 3-6 tilt TRB turbulence Radar facts cont rain echo attenuation Index--5 BRT brightness or BRT/LSS lightning sensor system