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Safety Recommendation Details

Safety Recommendation A-84-115
Details
Synopsis: ON NOVEMBER 24, 1983, AIR CANADA FLIGHT 965, A LOCKHEED L-1011, C-FTNJ, WITH 154 PASSENGERS AND 15 CREWMEMBERS ON BOARD, ENCOUNTERED SEVERE CLEAR AIR TURBULENCE ABOUT 105 MILES OFF THE COAST OF CHARLESTON, SOUTH CAROLINA, WHILE EN ROUTE TO TORONTO, CANADA, FROM PORT OF SPAIN, TRINIDAD. ONE FLIGHT ATTENDANT AND THREE PASSENGERS WERE SERIOUSLY INJURED DURING THE ENCOUNTER. TWO PHYSICIANS ABOARD THE FLIGHT PROVIDED IMMEDIATE MEDICAL ATTENTION TO THE INJURED. THE FLIGHT CONTINUED TO ITS DESTINATION AND LANDED WITHOUT FURTHER INCIDENT ABOUT 1 1/2 HOURS AFTER THE ACCIDENT. MEDICAL ASSISTANCE WAS ON HAND TO PROVIDE TREATMENT WHEN THE FLIGHT ARRIVED AT THE GATE. AT THE TIME OF THE TURBULENCE ENCOUNTER, THE FLIGHT WAS UNDER THE CONTROL OF THE JACKSONVILLE AIR ROUTE TRAFFIC CONTROL CENTER (ARTCC) METTA SECTOR, AND A CONVECTIVE SIGMET WAS IN EFFECT FOR A LARGE PORTION OF THE METTA SECTOR. THE METTA CONTROLLER HAD BEEN RELIEVED OF THE RESPONSIBILITY OF BROADCASTING SIGMETS UNDER THE TERMS OF THE FEDERAL AVIATION ADMINISTRATION'S HAZARDOUS INFLIGHT WEATHER ADVISORY SERVICE (HIWAS). THE FLIGHT CREW WAS NOT AWARE OF THE SIGMET.
Recommendation: THE NTSB RECOMMENDS THAT THE FEDERAL AVIATION ADMINISTRATOR: INSTITUTE A PROGRAM TO ENSURE THAT CHANGES TO AIR TRAFFIC CONTROL OPERATIONS AND COMMUNICATIONS PROCEDURES, MEANS TO DISSEMINATE AVIATION WEATHER INFORMATION, ETC., ARE PUBLISHED IN A MANNER TO DIRECTLY REACH ALL USERS OF THE NATIONAL AIRSPACE SYSTEM.
Original recommendation transmittal letter: PDF
Overall Status: Closed - Acceptable Action
Mode: Aviation
Location: CHARLESTON, SC, United States
Is Reiterated: No
Is Hazmat: No
Is NPRM: No
Accident #: DCA84AA008
Accident Reports: Air Canada Flight 965, Lockheed L-1011, C-FTNJ
Report #: AAR-84-13
Accident Date: 11/24/1983
Issue Date: 10/25/1984
Date Closed: 12/18/1986
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: 12/18/1986
Response: The Safety Board accepts the FAA's intent that the guidance now used to disseminate HIWAS information will be used in the future to disseminate information on changes or the availability of new services to users of the National Airspace System. Safety Recommendation A-84-115 has been classified as "Closed--Acceptable Action."

From: FAA
To: NTSB
Date: 1/17/1986
Response: I BELIEVE THAT THE PRESENT MEANS OF DISSEMINATING INFORMATION, ALONG WITH ADDITIONAL AVENUES LISTED IN FAA ORDER 7110.92A, ADEQUATELY ADDRESSES AND PROVIDES GUIDANCE ON THIS SUBJECT.

From: NTSB
To: FAA
Date: 5/14/1985
Response: The Safety Board believes that the list provided in response to Safety Recommendation A-84-111 provides broad coverage for domestic users of HIWAS. However, the Safety Board remains concerned that foreign operators may not be covered so thoroughly. Additionally, the Safety Board is concerned that the information dissemination program provided in your letter is only applicable to the HIWAS program. The intent of this Safety Recommendation was to ensure that all changes to the National Airspace System are disseminated in the manner you now have developed for the HIWAS program. The Safety Board would appreciate being advised of the FAA's policy on all future disseminations of National Airspace System notices. Pending receipt of this information, Safety Recommendation A-84-115 has been classified as "Open--Acceptable Action."

From: FAA
To: NTSB
Date: 2/11/1985
Response: FAA LTR: WE BELIEVE THE PRESENT MEANS OF DISSEMINATING INFORMATION ALONG WITH ADDITIONAL AVENUES LISTED IN OUR RESPONSE TO A-84-111 ADEQUATELY ADDRESS THE PROBLEM.