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Safety Recommendation Details

Safety Recommendation A-80-115
Details
Synopsis: ON JUNE 12, 1980, AN AIR WISCONSIN SWEARINGEN SW-4 CRASHED DURING AN ENCOUNTER WITH A LEVEL 5 OR GREATER THUNDERSTORM IN EASTERN NEBRASKA. THIRTEEN PERSONS WERE KILLED AND TWO PERSONS WERE SERIOUSLY INJURED. TESTIMONY GIVEN AT A PUBLIC HEARING HELD IN OMAHA, NEBRASKA, DURING SEPTEMBER 1980 INDICATED THAT THE FULL EXTENT OF THE AREA OF PRECIPITATION AND ACCURATE INTENSITY CHARACTERISTICS OF CONVECTIVE METEOROLOGICAL PHENOMENA ARE NOT PORTRAYED ON A CONTROLLER'S PLAN VIEW DISPLAY (PVD) BECAUSE THE WEATHER FIXED MAP UNIT (WFMU) IS DESIGNED TO BE SELECTIVE IN ITS DISPLAY OF PRECIPITATION AND IS LIMITED IN ITS CAPABILITY TO DISPLAY WEATHER ECHO INTENSITY LEVELS. WE BELIEVE THAT INSTALLATION OF THESE DISPLAYS IN ALL ARTCCS HAVING CWSUS SHOULD BE EXPEDITED TO PROVIDE REAL-TIME DEPICTION OF THE LOCATION AND INTENSITY OF ALL CONVECTIVE METEOROLOGICAL PHENOMENA AFFECTING A CENTER'S AIRSPACE.
Recommendation: THE NTSB RECOMMENDS THAT THE FEDERAL AVIATION ADMINISTRATION: EXPEDITE THE DELIVERY OF NWS WEATHER RADAR COLOR REMOTE DISPLAYS TO ALL AIR ROUTE TRAFFIC CONTROL CENTERS' CENTER WEATHER SERVICE UNITS. (URGENT)
Original recommendation transmittal letter: PDF
Overall Status: Closed - Acceptable Action
Mode: Aviation
Location: Valley, NE, United States
Is Reiterated: No
Is Hazmat: No
Is NPRM: No
Accident #: DCA80AA019
Accident Reports: Air Wisconsin, Inc., Swearingen A-226 Metro, N650S
Report #: AAR-80-15
Accident Date: 6/12/1980
Issue Date: 11/19/1980
Date Closed: 1/14/1986
Addressee(s) and Addressee Status: FAA (Closed - Acceptable Action)
Keyword(s): Air Traffic Control,Weather,Weather Equipment/Products/Reports

Safety Recommendation History
From: NTSB
To: FAA
Date: 1/14/1986
Response: We are pleased to note that the remote radar weather display system rrwds) is installed and operational at all of the air route traffic control centers' center weather service units. This recommendation is classified closed--acceptable action.

From: FAA
To: NTSB
Date: 6/19/1985
Response: FAA LTR: "THE REMOTE RADAR WEATHER DISPLAY SYSTEM (RRWDS) IS INSTALLED AND OPERATIONAL AT ALL OF THE AIR ROUTE TRAFFIC CONTROL CENTERS' CENTER WEATHER SERVICE UNITS."

From: NTSB
To: FAA
Date: 2/4/1985
Response: We are pleased to note that the national weather service weatherradar color remote displays have been installed in the air route traffic control centers'center weather service units and that work is underway to have the system fully operational by december 1985. We would appreciate being kept informed of the progress of this project. Safety recommenda- tions a-80-115 and -119 are classified open--acceptable action.

From: FAA
To: NTSB
Date: 10/15/1984
Response: FAA LETTER: INSTALLATION OF THE REMOTE RADAR WEATHER DISPLAYS IN THE AIR ROUTE TRAFFIC CONTROL CENTERS' CENTER WEATHER SERVICE UNITS HAS BEEN COMPLETED. THE DIGITIZERS ARE INSTALLED ON THE FAA'S AND NATIONAL WEATHER SERVICE'S RADARS. THESE DIGITIZERS, WHICH ARE THE SIGNAL TRANSMITTERS FOR THE RADAR, ARE BEING PEAKED TO ESTABLISHED STANDARDS AND TOLERANCES. THE SYSTEM WILL BE READY FOR USE WHEN THIS HAS BEEN COMPLETED AND THE TELEPHONE LINES HAVE BEEN INSTALLED. APPROXIMATELY 35 PERCENT OF THE RADAR SYSTEM HAS BEEN COMPLETED AND IS CURRENTLY IN USE. WE ANTICIPATE FULL USE OF THE SYSTEM BY DECEMBER 1985.

From: NTSB
To: FAA
Date: 4/22/1983
Response: We are pleased that the delivery of the radar remote weather display systems (rrwds) to all center weather service units (cwsu's) is anticipated by may 1983, and that a Data Source: NTSB Recommendations to FAA and FAA Responses full rrwds network be in operation by july 1983. We hope that every effort is made to meet these dates. Pending completion of the delivery of the rrwds to all cwsu's, we will continues to maintain this recommendation in an open--acceptable action status. The faa's efforts to respond to this safety recommendation are appreciated.As mentioned in your letter of 2/9/83, a-80-115 was one five recommendations resulting from the air wisconsin crash of june 12, 1980. The other four recommendation (a-80-116 thru -119) have been held in an open-- acceptable action status april 10, 1981, and we would appreciate further information regarding the status of action on these recommendations.

From: FAA
To: NTSB
Date: 2/9/1983
Response: FAA LETTER: OUR CURRENT ESTIMATE IS FOR DELIVERIES TO NWS RADAR SITES TO BEGIN FEBRUARY 1983, AND CONTINUE THROUGH MAY 1983. DELIVERIES TO FAA RADAR SITES ARE SCHEDULED TO BEGIN IN MARCH 1983, AND CONTINUE THROUGH MAY 1983. DELIVERIES OF THE RRWDS INDICATOR SITE EQUIPMENT WILL BE CONCURRENT WITH THE ABOVE-MENTIONED EQUIPMENT.

From: NTSB
To: FAA
Date: 4/10/1981
Response: The safety board is pleased to note that the faa essentially agrees with these recommendations and that actions are in progress toward their fulfillment. A-80- 115 thru 119 are classified in an open--acceptable action status.

From: FAA
To: NTSB
Date: 2/17/1981
Response: FEDERAL AVIATION ADMINISTRATION LTR: THE FAA CONCURS IN THIS RECOMMENDATION AND EVERY EFFORT IS BEING MADE TO EXPEDITE DELIVERY OF THE COLOR DISPLAY. ALL CONTRACT NEGOTIATIONS HAVE BEEN COMPLETED, AND THE DELIVERY SCHEDULE HAS BEEN FINALIZED. THE FIRST DELIVERY IS SCHEDULED FOR JUNE 1981 AND THE LAST FOR MAY OF 1982. A COPY OF THE NTSB RECOMMENDATION HAS BEEN PROVIDED TO ALL PARTICIPANTS OF THE WEATHER RADAR REMOTE PROGRAM IN ORDER TO EMPHASIZE THE URGENCY OF THIS EFFORT.