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Safety Recommendation Details

Safety Recommendation A-78-003
Details
Synopsis: ABOUT 1712 E.D.T. ON JUNE 23, 1976, ALLEGHENY AIRLINES, INC., 121, A DOUGLAS DC-9-31, CRASHED ON THE PHILADELPHIA INTERNATIONAL AIRPORT, PHILADELPHIA, PENNSYLVANIA; THE WRECKAGE CAME TO REST ABOUT 6,000 FEET BEYOND THE THRESHOLD AND ABOUT 350 FEET TO THE RIGHT OF THE CENTERLINE OF RUNWAY 27R. OF THE 106 PERSONS ONBOARD, 86 PERSONS WERE INJURED; THERE WERE NO FATALITIES.
Recommendation: ESTABLISH A JOINT GOVERNMENT - INDUSTRY COMMITTEE TO DEVELOP FLIGHT TECHNIQUES FOR COPING WITH INADVERTENT ENCOUNTERS WITH SEVERE WIND SHEARS AT LOW ALTITUDE.
Original recommendation transmittal letter: PDF
Overall Status: Closed - Acceptable Action
Mode: Aviation
Location: Philadelphia, PA, United States
Is Reiterated: No
Is Hazmat: No
Is NPRM: No
Accident #: DCA76AZ029
Accident Reports: Allegheny Airlines, Inc., Douglas DC-9 N994VJ
Report #: AAR-78-02
Accident Date: 6/23/1976
Issue Date: 2/2/1978
Date Closed: 4/17/1979
Addressee(s) and Addressee Status: FAA (Closed - Acceptable Action)
Keyword(s): Low Level Windshear, Weather, Wind

Safety Recommendation History
From: NTSB
To: FAA
Date: 4/17/1979
Response: The Safety Board is pleased to note that based on simulator studies conducted by the FAA and industry, the FAA issued Advisory Circular 00-05a on January 23, 1979, and Air Carrier Operations Bulletin No. 7-79-01 on January 10, 1979, both on pilot techniques to minimize the effects of low level wind shear. We consider the FAA's responsive action to fulfill the intent of our recommendation which is now classified as closed-acceptable action.

From: FAA
To: NTSB
Date: 3/20/1979
Response: This is to advise that FAA action with respect to National Transportation Safety Board (NTSB) Recommendation A-78-3 has been completed. The advisory circular (AC) and air carrier operations bulletin (ACOB) to which our letter of October 11, 1978, referred have been issued. AC 00-50a, Low Level Wind Shear was issued January 23, 1979. This circular is intended to provide guidance for recognizing low level wind shear, describes preflight and in-flight procedures for detecting and predicting the phenomenon and provides pilot techniques to minimize the effects when inadvertently encountered during takeoff or landing. ACOB No. 7-79-1, Low level Wind Shear is included in Change 9, Order 8430.17 issued January 10, 1979. This bulletin requests principal operations inspectors to assure that the information contained in AC OO- 50a is reflected in the air carriers' operations procedures and training programs. The information developed, to date, from the simulator studies conducted by the FAA/NTSB/Industry and from other efforts has been included in AC 00-50a. We believe that this meets the intent of the recommendation. Copies of AC 00-50a and ACOB No. 7-79-1 are enclosed.

From: NTSB
To: FAA
Date: 12/5/1978
Response: The staff evaluation Open--Acceptable alternate action. Further evaluation will be made when we receive the operations bulletin and advisory circular.

From: NTSB
To: FAA
Date: 9/19/1978
Response: September 19, 1978 letter questioned FAA's priority emphasis being applied to evaluate takeoff and climb procedures as related to low- altitude wind shear. It urged FAA to reconsider the priority and move out with a government/industry team.

From: FAA
To: NTSB
Date: 5/5/1978
Response: FAA LTR: AIR CARRIER OPERATIONS BULLETIN 7-76-34 WILL BE REVISED ACCORDINGLY AND COORDINATED WITH INDUSTRY PRIOR TO ISSUANCE, WHICH IS SCHEDULED FOR JUNE 1, 1978. FAA DOES NOT BELIEVE THAT ESTABLISHMENT OF A JOINT GOVERNMENT-INDUSTRY COMMITTEE TO DEVELOP WINDSHEAR FLIGHT TECHNIQUES IS NECESSARY AT THIS TIME. 10/11/78 FAA LTR: OUR INVESTIGATION INTO THIS AREA HAD DEVELOPED A CONSIDERABLE AMOUNT OF INFORMATION ON LOW LEVEL WIND SHEAR. WE DECIDED, THEREFORE, TO PUBLISH THE INFORMATION CONCERNING TECHNIQUES FOR DETECTING AND COPING WITH LOW LEVEL WIND SHEAR IN A FORM THAT IS DIRECTED TO ALL PERSONS INVOLVED IN FLIGHT OPERATIONS. WE HAVE AMENDED THE AIR CARRIER OPERATIONS BULLETIN PROJECT TO INCLUDE REVISION OF ADVISORY CIRCULAR 00-50, LOW LEVEL WIND SHEAR. 3/20/79 - FAA LTR: AC 00-50A, LOW LEVEL WIND SHEAR, WAS ISSUED JANUARY 23, 1979. THIS CIRCULAR IS INTENDED TO PROVIDE GUIDANCE FOR RECOGNIZING LOW LEVEL WIND SHEAR, DESCRIBES PREFLIGHT AND INFLIGHT PROCEDURES FOR DETECTING AND PREDICTING THE PHENOMENON AND PROVIDES PILOT TECHNIQUES TO MINIMIZE THE EFFECTS WHEN INADVERTENTLY ENCOUNTERED DURING TAKEOFF OR LANDING. AIR CARRIER OPERATIONS BULLETIN NO. 7-79-1, LOW LEVEL WIND SHEAR, IS INCLUDED IN CHANGE 9, ORDER 8430.17, ISSUED JANUARY 10, 1979. THIS BULLETIN REQUESTS PRINCIPAL OPERATIONS INSPECTORS TO ASSURE THAT THE INFORMATION CONTAINED IN AC 00-50A IS REFLECTED IN THE AIR CARRIERS' OPERATIONS PROCEDURES AND TRAINING PROGRAMS.