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Safety Recommendation Details

Safety Recommendation A-80-119
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: REQUIRE AIR ROUTE TRAFFIC CONTROL CENTERS TO MAKE MAXIMUM USE OF THE EXISTING NATIONAL WEATHER SERVICE RADAR SITES AS INPUTS TO THE COLOR REMOTE DISPLAYS AT THEIR FACILITIES.
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 also pleased to note that the remote radar weather display system now utilizes digitized equipment to provide the center weather service units with approximately 90 percent coverage of the continental united states. This recommendation is likewise classified closed--acceptable action.

From: FAA
To: NTSB
Date: 6/19/1985
Response: FAA LTR: "THE RRWDS UTILIZES WEATHER DIGITIZING EQUIPMENT AT 77 NATIONAL WEATHER SERVICE RADARS AND 57 FEDERAL AVIATION ADMINISTRATION LONG-RANGE RADAR FACILITIES. THE RRWDS PROVIDES THE CENTER WEATHER SERVICE UNITS WITH A CONTINENTAL UNITED STATES COVERAGE OF APPROXIMATELY 90 PERCENT."

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: 11/3/1983
Response: The safety board agrees that the status of action taken regarding this Data Source: NTSB Recommendations to FAA and FAA Responses recommendation is dependent on the implementation of the radar remote weather display system (rrwds) at the air route traffic control centers. Therefore, pending completion of the rrwds program and further response from the faa, we will continue to maintain safety recommendation a-80-119 in an open--acceptable action status. Your continued cooperation in solving aviation safety problems is appreciated.

From: FAA
To: NTSB
Date: 7/15/1983
Response: FAA LETTER: THE STATUS OF ACTION BEING TAKEN ON THIS RECOMMENDATION IS DEPENDENT ON THE IMPLEMENTATION OF RECOMMENDATION A-80-115. DELIVERIES OF THE RADAR REMOTE WEATHER DISPLAY SYSTEM EQUIPMENTS ARE UNDERWAY. AS OF JULY 11, 1983, 84 RADAR SITES AND 27 CENTER WEATHER SERVICE UNITS AND EN ROUTE FLIGHT ADVISORY SYSTEM POSITIONS HAVE BEEN EQUIPPED. THE REMAINDER OF THE SYSTEMS WILL BE INSTALLED AND OPERATING BY THE END OF DECEMBER.

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 THE INTENT OF THIS RECOMMENDATION AND PRESENT PLANNING CALLS FOR 70 NWS RADARS TO BE REMOTED TO AIR ROUTE TRAFFIC CONTROL CENTERS. TWENTY-NINE AIR TRAFFIC CONTROL (ATC) RADARS ARE USED IN THE ABSENCE OF AVAILABLE NWS RADARS.