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Safety Recommendation Details

Safety Recommendation A-88-140
Details
Synopsis: ON NOVEMBER 15, 1987, CONTINENTAL AIRLINES, INC., FLIGHT 1713, A MCDONNELL DOUGLAS DC-9-14, N626TX, WAS OPERATING AS A REGULARLY SCHEDULED, PASSENGER-CARRYING FLIGHT BETWEEN DENVER, COLORADO, AND BOISE, IDAHO. THE AIRPLANE WAS CLEARED TO TAKE OFF FOLLOWING A DELAY OF APPROXIMATELY 27 MINUTES AFTER DEICING. THE TAKEOFF ROLL WAS UNEVENTFUL, BUT FOLLOWING A RAPID ROTATION, THE AIRPLANE CRASHED OFF THE RIGHT SIDE OF RUNWAY 35 LEFT. BOTH PILOTS, 1 FLIGHT ATTENDANT, AND 25 PASSENGERS SUSTAINED FATAL INJURIES. TWO FLIGHT ATTENDANTS AND 52 PASSENGERS SURVIVED.
Recommendation: THE NTSB RECOMMENDS THAT THE FEDERAL AVIATION ADMINISTRATION: INITIATE A RESEARCH PROJECT TO ACQUIRE DATA FROM DEDICATED SENSORS TO DETERMINE WHAT CONSIDERATION, IF ANY, SHOULD BE GIVEN TO WAKE VORTICES IN A PARALLEL OFFSET RUNWAY SITUATION.
Original recommendation transmittal letter: PDF
Overall Status: Closed - Acceptable Action
Mode: Aviation
Location: DENVER, CO, United States
Is Reiterated: No
Is Hazmat: No
Is NPRM: No
Accident #: DCA88MA004
Accident Reports: Continental Airlines, Inc., Flight 1713 McDonnell Douglas DC-9-14, N626TX
Report #: AAR-88-09
Accident Date: 11/15/1987
Issue Date: 11/3/1988
Date Closed: 5/6/1991
Addressee(s) and Addressee Status: FAA (Closed - Acceptable Action)
Keyword(s):

Safety Recommendation History
From: NTSB
To: FAA
Date: 5/6/1991
Response: Safety Recommendation A-88-140 states that the FAA should initiate a research project to determine what considerations, if any, should be given to wake vortex effects for operations from parallel offset runways. The FAA response of August 28, 1990, transmitted a copy of the FAA's Wake Vortex Program Plan, dated May 1990, which describes the studies and research needed to achieve an increased airport capacity without a reduction in safety, including consideration for parallel runway operations. Safety Recommendation A-88-140 is classified "Closed--Acceptable Action."

From: FAA
To: NTSB
Date: 8/28/1990
Response: THE FAA PUBLISHED ITS WAKE VORTEX RESEARCH PLAN IN MAY 1990. THE SIX MAJOR ACTIVITIES THAT ARE ADDRESSED IN THE WAKE VORTEX PLAN ARE: (1) REVIEW & ANALYSIS OF WAKE VORTEX RESEARCH; (2) DEVELOPMENT OF NEW RECOMMENDED AIRCRAFT CLASSIFICATION & SEPARATION STANDARDS; (3) CHARACTERIZATION OF WAKE VORTICES; (4) DEVELOPMENT OF WAKE VORTEX WARNING SYSTEMS; (5) VORTEX ALLEVIATION & MODIFICATION; & (6) UPDATING OR DEVELOPMENT OF USER EDUCATIONAL MATERIALS & INFORMATION. THE TEST PROGRAM WILL BE CONDUCTED AT THE FAA'S TECHNICAL CENTER AS OPPOSED TO THE MEMPHIS & RALEIGH-DURHAM SITES MENTIONED IN THE FAA'S LTR. TO THE BOARD DATED 1/30/89.

From: FAA
To: NTSB
Date: 1/30/1989
Response: THE FAA HAD INITIATED A WAKE VORTEX RESEARCH PLAN IN JUNE 1988, PRIOR TO THE SAFETY BOARD'S ISSUANCE OF THIS RECOMMEN DATION. AN EXECUTIVE SUMMARY OF THE PROGRAM HAS BEEN DRAFTED, AND THE DEVELOPMENT OF THE PROGRAM IS IN PROGRESS. A MAJOR TASK DESCRIBED IN THE SUMMARY IS THE MEASUREMENT OF AIRCRAFT VORTEX BEHAVIOR BOTH IN FLIGHT TEST ENVIRONMENTS AND DURING ROUTINE AIRPORT TRAFFIC OPERATIONS. THE OBJECTIVES OF THE PRESENT FAA PROGRAM MEET THE INTENT OF THIS RECOMMENDATION. CURRENT PROCEDURES AND SEPARATIONS BETWEEN AIRCRAFT ARE BASED ON PREVIOUS MEASUREMENTS OF VORTICES IN GROUND EFFECT AT SEVERAL TEST SITES AND PAST OPERATIONAL EXPERIENCE WITH PARALLEL RUNWAY OPERATIONS. THE CURRENT MINIMUM LATERAL SEPARATION BETWEEN PARALLEL RUNWAYS FOR FULLY INDEPENDENT VORTEX-FREE OPERATIONS IS 4,300 FEET. ANY LESSER SEPARATION BETWEEN PARALLELS REQUIRES SPECIFIC AIR TRAFFIC CONTROL PROCEDURES TO BE USED TO ENSURE ADEQUATE PROTECTION FROM VORTEX ENCOUNTERS. PRESENTLY, THERE ARE TWO TEST PROGRAMS BEING CONDUCTED AT RALEIGH-DURHAM, NC, AND MEMPHIS, TN, TO EXAMINE THE EFFECT OF IMPROVED RADAR TRACKING IN THE TERMINAL AREA. SEPARATIONS BETWEEN AIRCRAFT DURING THESE PROGRAMS ARE PREDICATED ON PREVIOUS VORTEX MEASUREMENTS.