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Safety Recommendation Details

Safety Recommendation A-72-076
Details
Synopsis: PRELIMINARY EVIDENCE COLLECTED DURING THE INVESTIGATION OF THE ACCIDENT INVOLVING DELTA AIRLINES, INC., DC-9, N3305L, AT FORT WORTH, TEXAS, ON MAY 30, 1972, SUGGESTS THAT THE VORTEX TURBULENCE GENERATED BY AN AMERICAN AIRLINES, INC., DC-10 MIGHT HAVE BEEN A FACTOR IN THE OCCURRENCE. THE DC-10 HAD JUST COMPLETED A "TOUCH AND GO" LANDING WHILE THE DC-9 WAS ON THE FINAL APPROACH.
Recommendation: REEVALUATE WAKE TURBULENCE SEPARATION CRITERIA FOR AIRCRAFT OPERATING BEHIND HEAVY JET AIRCRAFT.
Original recommendation transmittal letter: PDF
Overall Status: Closed--No Longer Applicable
Mode: Aviation
Location: Fort Worth, TX, United States
Is Reiterated: No
Is Hazmat: No
Is NPRM: No
Accident #: 79669
Accident Reports: Delta Air Lines, Inc., McDonnell Douglas DC-9-14, N3305L
Report #: AAR-73-03
Accident Date: 5/30/1972
Issue Date: 6/14/1972
Date Closed: 12/14/1972
Addressee(s) and Addressee Status: FAA (Closed--No Longer Applicable)
Keyword(s): Weather, Turbulence

Safety Recommendation History
From: NTSB
To: FAA
Date: 12/1/1973
Response: Closed--Acceptable Action.

From: FAA
To: NTSB
Date: 7/5/1972
Response: ADVISORY CIRCULAR 90-23B ISSUED IN MAY 1971 WAS DISTRIBUTED TO ABOUT 650,000 PERSONS. FURTHER REPRINTS WILL BE DISTRIBUTED TO THE AVIATION COMMUNITY. PART 1 OF THE AIRMAN'S INFORMATION MANUAL CONTAINS DETAILED INFORMATION ON VORTEX AVOIDANCE PROCEDURES. THIS IS REPUBLISHED AND WIDELY DISTRIBUTED EACH QUARTER. IT IS INTENDED TO PROVIDE FREE DISTRIBUTION OF THIS TO ALL FIXED BASED OPERATOR.