Skip Ribbon Commands
Skip to main content
Safety Recommendation Details

Safety Recommendation A-80-117
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 DEVELOPMENT OF APPROPRIATE GRAPHIC MAPPING TECHNIQUES FOR CORRELATION OF THE NWS WEATHER RADAR COLOR REMOTE DISPLAY AND THE AIR TRAFFIC CONTROLLER'S RADAR DISPLAY PRESENTATION.
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: 10/15/1984
Addressee(s) and Addressee Status: FAA (Closed - Acceptable Action)
Keyword(s): Air Traffic Control, Weather, Weather Equipment/Products/Reports

Safety Recommendation History
From: FAA
To: NTSB
Date: 10/15/1984
Response:

From: NTSB
To: FAA
Date: 11/3/1983
Response: The intent of our recommendation has been satisfied by the testing that was conducted at the cleveland air route traffic control center from april to october 1981. Therefore, this recommendation will be classified as closed--acceptable action.

From: FAA
To: NTSB
Date: 7/15/1983
Response: FAA LETTER: DEVELOPMENT OF GRAPHIC MAPS FOR CORRELATION OF WEATHER ON COLOR DISPLAYS AND AIR TRAFFIC CONTROLLER DISPLAYS WAS SUCCESSFUL. HOWEVER, IT WAS REPORTED THAT THE INFORMATION ON THE COLOR WEATHER MONITORS PRESENTED TOO MUCH CLUTTER AND COULD NOT SATISFY THE NEEDS FOR GRAPHIC DATA ON A SEPARATE DISPLAY IN A LEGIBLE MANNER. THE WEATHER DISPLAY MONITOR WAS TOO SMALL TO ACCOMMODATE THE REQUIRED AMOUNT OF GRAPHICS. THE EFFORT TO CORRELATE WEATHER AND AIR TRAFFIC DATA WILL CONTINUE AS PART OF RECOMMENDATION A-80-118.

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 THE CONTRACTOR IS WORKING WITH THE CLEVELAND AIR ROUTE TRAFFIC CONTROL CENTER STAFF IN AN EFFORT TO MODIFY THE OFF-THE-SHELF HARDWARE AND SOFTWARE SO AS TO MEET THE CENTER'S REQUIREMENTS FOR AN ADEQUATE DISPLAY. RECENT REPORTS INDICATE THAT THE EQUIPMENT MODIFICATION IS NOW 80 PERCENT COMPLETE. SEVERAL SOFTWARE PROBLEMS REMAIN TO BE SOLVED, BUT THESE ARE RELATIVELY MINOR AND RELATE TO TIME SOURCE, ANTENNA TILT, AND OTHER SECONDARY DATA.