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Safety Recommendation Details

Safety Recommendation A-80-116
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: SCHEDULE THE PLANNED TESTING OF NWS WEATHER RADAR COLOR REMOTE DISPLAYS AT THE CLEVELAND AIR ROUTE TRAFFIC CONTROL CENTER TO ENCOMPASS THE NEXT SEASON OF FREQUENT CONVECTIVE METEOROLOGICAL ACTIVITY.
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 successful development of graphic maps for correlation of weather on color displays and air traffic control displays satisfies the intent of this recommendation. However, in consideration of the fact that the weather display monitor was too small to accommodate the required amount of graphics, and the use of separate weather monitors at the air traffic control sectors proved unsuccessful, we urge the faa to continue its efforts to correlate weather and air traffic data. Based on the information contained in your response the board has placed safety Data Source: NTSB Recommendations to FAA and FAA Responses recommendation a-80-117 in a closed acceptable action status.

From: FAA
To: NTSB
Date: 7/15/1983
Response: FAA LETTER: THE TESTING OF THE NATIONAL WEATHER SERVICE (NWS) WEATHER RADAR COLOR REMOTE DISPLAYS WAS CONDUCTED AT THE CLEVELAND AIR ROUTE TRAFFIC CONTROL CENTER (ARTCC) FROM APRIL THROUGH OCTOBER 1981. THE TEST PROVED THAT, WITH THE PRESENT EQUIPMENT, THE DUAL DISPLAY ENVIRONMENT AT THE SECTOR POSED PROBLEMS TO THE CONTROLLER IN TERMS OF CLUTTER AND DISTRACTION. NO ADDITIONAL TESTING IS PLANNED.

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. HOWEVER, TESTING OF THE WEATHER RADAR REMOTE DISPLAYS IN THE CLEVELAND AIR ROUTE TRAFFIC CONTROL CENTER CAN TAKE PLACE ONLY WHEN SUFFICIENT CONVECTIVE METEOROLOGICAL ACTIVITY IS AVAILABLE. ACCORDINGLY, NO DATE HAS BEEN SET FOR THIS TESTING, BUT WE WILL COMMENCE THIS EFFORT AT THE APPROPRIATE TIME.