Various air carrier flight crew's experience WX radar interference.

Attributes
ACN	207240
Time
Date	199204
Day	Sat
Local Time Of Day	0601 To 1200
Place
Locale Reference	atc facility : chs
State Reference	SC
Altitude	msl bound lower : 18000 msl bound upper : 37000
Environment
Flight Conditions	Mixed
Light	Daylight
Aircraft 1
Controlling Facilities	artcc : zdc
Operator	common carrier : air carrier
Make Model Name	Medium Large Transport, Low Wing, 2 Turbojet Eng
Navigation In Use	Other
Flight Phase	climbout : intermediate altitude cruise other
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : instrument pilot : commercial pilot : atp
Experience	flight time last 90 days : 200 flight time total : 18000 flight time type : 3000
ASRS Report	207240
Person 2
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : commercial pilot : instrument
Events
Anomaly	other anomaly other
Independent Detector	other flight crewa other other : unspecified
Resolutory Action	other
Consequence	Other
Supplementary
Air Traffic Incident	other

Narrative:

From 50 mi north of chs to 120 mi south of hopewell our WX radar was being interfered with. Radar had a single spoke of green and magenta color approximately 1/2 inch to 3/4 inch wide at top of screen, tapering to 0 at bottom of screen at the 2 O'clock position. I asked dca center on 118 pt 92 if any other aircraft had complained. He said no. Then air carrier a, flts X and Y, and air carrier B, flight Z -- also complained of similar problems, the same thing had happened to me the day before in the same area. The spoke was continuous at 2 O'clock until the 9 O'clock position where it disappeared at 120 mi south of hopewell. This spoking rendered the radar highly suspect and unreliable for WX avoidance in an area of reported thunderstorm.

Original NASA ASRS Text

Title: VARIOUS ACR FLC'S EXPERIENCE WX RADAR INTERFERENCE.

Narrative: FROM 50 MI N OF CHS TO 120 MI S OF HOPEWELL OUR WX RADAR WAS BEING INTERFERED WITH. RADAR HAD A SINGLE SPOKE OF GREEN AND MAGENTA COLOR APPROX 1/2 INCH TO 3/4 INCH WIDE AT TOP OF SCREEN, TAPERING TO 0 AT BOTTOM OF SCREEN AT THE 2 O'CLOCK POS. I ASKED DCA CTR ON 118 PT 92 IF ANY OTHER ACFT HAD COMPLAINED. HE SAID NO. THEN ACR A, FLTS X AND Y, AND ACR B, FLT Z -- ALSO COMPLAINED OF SIMILAR PROBLEMS, THE SAME THING HAD HAPPENED TO ME THE DAY BEFORE IN THE SAME AREA. THE SPOKE WAS CONTINUOUS AT 2 O'CLOCK UNTIL THE 9 O'CLOCK POS WHERE IT DISAPPEARED AT 120 MI S OF HOPEWELL. THIS SPOKING RENDERED THE RADAR HIGHLY SUSPECT AND UNRELIABLE FOR WX AVOIDANCE IN AN AREA OF RPTED TSTM.

Data retrieved from NASA's ASRS site as of July 2007 and automatically converted to unabbreviated mixed upper/lowercase text. This report is for informational purposes with no guarantee of accuracy. See NASA's ASRS site for official report.