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Safety Recommendation Details

Safety Recommendation A-83-024
Details
Synopsis: ON JULY 9, 1982, PAN AMERICAN WORLD AIRWAYS FLIGHT 759 CRASHED AFTER TAKING OFF FROM RUNWAY 10 AT NEW ORLEANS INTERNATIONAL AIRPORT, KENNER, LOUISIANA. WHEN FLIGHT 759 TOOK OFF, THERE WERE ISOLATED HEAVY SHOWERS OVER THE AIRPORT AND TO THE EAST OF THE AIRPORT ALONG THE AIRPLANE'S INTENDED DEPARTURE PATH. LOW LEVEL WIND SHEAR CONDITIONS HAD BEEN DETECTED BY THE AIRPORT'S LOW LEVEL WIND SHEAR ALERT SYSTEM (LLWSAS), AND THE SYSTEM HAD ALARMED SEVERAL TIMES, THE LAST TIME ABOUT 4 MINUTES BEFORE FLIGHT 759'S TAKEOFF. THE SYSTEM WAS NOT ALARMING AT THE TIME THE TAKEOFF CLEARANCE WAS ISSUED; HOWEVER, A WIND SHEAR ADVISORY WAS BROADCAST 2 SECONDS AFTER THE ACCIDENT.
Recommendation: THE NTSB RECOMMENDS THAT THE FEDERAL AVIATION ADMINISTRATION: ENCOURAGE INDUSTRY TO EXPEDITE THE DEVELOPMENT OF FLIGHT DIRECTOR SYSTEMS SUCH AS MFD-DELTA-A AND HEAD-UP TYPE DISPLAYS WHICH PROVIDE ENHANCED PITCH GUIDANCE LOGIC WHICH RESPONDS TO INERTIAL SPEED/AIRSPEED CHANGES AND GROUND PROXIMITY AND ENCOURAGE OPERATORS TO INSTALL THESE SYSTEMS.
Original recommendation transmittal letter: PDF
Overall Status: Closed - Acceptable Action
Mode: Aviation
Location: Kenner, LA, United States
Is Reiterated: No
Is Hazmat: No
Is NPRM: No
Accident #: DCA82AA028
Accident Reports: Pan American World Airways, Inc., Clipper 759, Boeing 727-235, N4737
Report #: AAR-83-02
Accident Date: 7/9/1982
Issue Date: 3/25/1983
Date Closed: 12/18/1986
Addressee(s) and Addressee Status: FAA (Closed - Acceptable Action)
Keyword(s):

Safety Recommendation History
From: NTSB
To: FAA
Date: 12/18/1986
Response: The Safety Board is aware of the FAA's efforts to encourage the development of airborne systems to detect windshears. The Safety Board believes that the FAA has made a concerted effort to provide industry with the technical criteria and guidance necessary for the creation of airborne windshear alerting and guidance equipment and thus has complied with the intent of this recommendation. Based upon the actions taken by the FAA, Safety Recommendation A-83-24 has been classified as "Closed-- Acceptable Action."

From: FAA
To: NTSB
Date: 10/6/1986
Response: THE FAA HAS ESTABLISHED AN AIRBORNE WIND SHEAR DETECTION AND AVOIDANCE PROGRAM. THE OBJECTIVE OF THIS PROGRAM IS TO DEVELOP THE SYSTEM REQUIREMENTS FOR FORWARD LOOKING WIND SHEAR SENSORS FOR AIRCRAFT. THIS PROGRAM IS BEING PERFORMED JOINTLY BETWEEN THE FAA AND THE NASA WITH THE PRIMARY INTENT OF PROVIDING AN ENVIRONMENT FOR INDUSTRY TO ACCELERATE THEIR DEVELOPMENT AND CERTIFICATION PROGRAMS FOR WIND SHEAR DEVICES.

From: FAA
To: NTSB
Date: 9/16/1986
Response:

From: NTSB
To: FAA
Date: 9/16/1986
Response: In the course of the Safety Board's investigation of an accident involving Delta Air Lines flight 191 at Dallas/Fort Worth International Airport, Texas, on August 2, 1985, the Safety Board has performed a detailed review of all Safety Recommendations, currently classified as open, issued to the FAA on the subject of windshear. Also addressed in this review were three Safety Recommendations that discussed the timely detection of severe weather, though not specifically related to windshear or microbursts. The Safety Board's review included past FAA responses, evaluation of the FAA's letters of September 24, 1985, and May 5, 1986, and our analysis of the FAA's Integrated Wind Shear Program Plan. A more descriptive review of the FAA's responses to these Safety Recommendations and of the program plan is contained in appendix H of the Safety Board's report of the Delta flight 191 accident. The open Safety Recommendations reviewed by the Safety Board are as follows: A-74-13 A-76-34 A-77-63 A-80-118 A-83-15 A-83-18 A-83-19 A-83-20 A-83-21 A-83-22 A-83-23 A-83-24 A-83-25 A-85-26 A-85-27 The Safety Board has carefully reviewed the Integrated Wind Shear Program Plan and the two letters from the FAA mentioned above and finds that the actions concurrently being taken and planned by the FAA will comply with the intent of all of the above Safety Recommendations when implemented. Therefore, all of the above-listed Safety Recommendations have been classified as "Open--Acceptable Action" pending completion of the FAA's planned actions. The Safety Board appreciates the FAA's actions to improve windshear detection and avoidance, and in the dissemination of information on windshear.

From: NTSB
To: FAA
Date: 10/1/1985
Response: We consider Advisory Circular (AC) No. 120-41, "Criteria for Operational Approval for Airborne Wind Shear Alerting and Guidance Systems," to be an excellent guide for the development of an airborne wind shear alerting and flight guidance system. However, we are concerned with the lagging response from industry and believe that little or no progress will be made unless the FAA takes some strong action to pursue the objective of this recommendation. Safety Recommendation A-83-24 is classified as "Open--Unacceptable Action" pending the FAA's further response.

From: FAA
To: NTSB
Date: 4/2/1985
Response: FAA LTR: THE FAA HAS PROVIDED ENCOURAGEMENT TO THE INDUSTRY REGARDING DEVELOPMENT OF AIRBORNE WIND SHEAR SYSEMS THROUGH AC120-41, CRITERIA FOR OPERATIONAL APPROVAL OF AIRBORNE WIND SHEAR ALERTING AND FLIGHT GUIDANCE SYSTEMS, ISSUED NOVEMBER 7, 1983. THE AC DOES NOT SPECIFICALLY DESCRIBE THE TECHNOLOGY TO BE USED FOR THESE SYSTEMS SINCE FAA DOES NOT DICTATE DESIGN. RATHER, THE AC DESCRIBES THREE TYPES OF SYSTEMS WHICH MAY OBTAIN APPROVAL THROUGH PROOF OF CONCEPT TESTING. THE THREE AIRBORNE SYSTEM TYPES ARE: (1) WIND SHEAR ALERTING; (2) WIND SHEAR ALERTING AND FLIGHT GUIDANCE; AND (3) WIND SHEAR DETECTION AND AVOIDANCE. TO DATE, NO 14 CFR PART 121 OR 14 CFR PART 135 OPERATOR HAS PRESENTED A SYSTEM FOR APPROVAL. HOWEVER, AT LEAST ONE SYSTEM MANUFACTURER HAS OBTAINED SUPPLEMENTAL TYPE CERTIFICATION FOR AN ALERTING AND GUIDANCE SYSTEM (TYPE (2)) FOR USE BY 14 CFR PART 91 OPERATORS. THE AC IS IMPLICIT THAT ONLY TYPES (2) OR (3) WOULD BE ELIGIBLE FOR APPROVAL FOR OPERATIONS UNDER 14 CFR PART 121 OR 14 CFR PART 135.

From: NTSB
To: FAA
Date: 5/29/1984
Response: We are awaiting the FAA's response to this recommendation.

From: FAA
To: NTSB
Date: 7/21/1983
Response: FAA LETTER: WE ARE STILL IN THE PROCESS OF REVIEWING THIS RECOMMENDATION. AFTER COMPLETION OF OUR REVIEW, WE WILL INFORM THE BOARD OF OUR FINDINGS IN APPROXIMATELY 60 DAYS.