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Safety Recommendation Details

Safety Recommendation A-78-081
Details
Synopsis: ON MAY 18, 1978, N6423K, A CESSNA 150, AND N121GW, A FALCON FAN JET, COLLIDED IN MIDAIR ABOUT 3 1/2 MILES WEST OF MEMPHIS INTERNATIONAL AIRPORT, MEMPHIS, TENNESSEE. AT THE TIME OF THE COLLISION BOTH AIRCRAFT WERE OPERATING UNDER THE CONTROL JURISDICTION OF MEMPHIS TOWER AT AN ASSIGNED ALTITUDE OF 2,000 FEET M.S.L. AND WERE IN RADIO/RADAR CONTACT WITH DIFFERENT FACILITY CONTROLLERS ON SEPARATE RADIO FREQUENCIES. VISUAL METEOROLOGICAL CONDITIONS PREVAILED AT THE TIME.
Recommendation: THE NTSB RECOMMENDS THAT THE FEDERAL AVIATION ADMINISTRATION: REQUIRE MODE "C" TRANSPONDER EQUIPMENT FOR OPERATIONS WITHIN A TRSA I AND GROUP II TCA AND REQUIRE THAT A PILOT OF A VFR FLIGHT TRAVERSING A TRSA I ESTABLISH RADIO CONTACT WITH THE APPROPRIATE ATC FACILITY BEFORE ENTERING THE DESIGNATED AIRSPACE.
Original recommendation transmittal letter: PDF
Overall Status: Closed - Acceptable Alternate Action
Mode: Aviation
Location: Memphis, TN, United States
Is Reiterated: No
Is Hazmat: No
Is NPRM: No
Accident #: DCA78AA013
Accident Reports: Midair Collision Involving a Falcon Jet, N121GW and Cessna 150M, N6423K
Report #: AAR-78-14
Accident Date: 5/18/1978
Issue Date: 10/26/1978
Date Closed: 7/1/1981
Addressee(s) and Addressee Status: FAA (Closed - Acceptable Alternate Action)
Keyword(s):

Safety Recommendation History
From: NTSB
To: FAA
Date: 7/1/1981
Response: We note that the increased use of transponders was considered in the provisions of nprm 78-19. We also note that the requirements for transponders in group 1 and group 88 tca's has been accepted and established, and as the number of tca's increase, so will the requirement for transponders where none now exist. This recommendation is therefore, classified in a closed--acceptable alternate action status.

From: FAA
To: NTSB
Date: 4/17/1981
Response: FEDERAL AVIATION ADMINISTRATION LTR: NPRM 78-19 INCLUDED PROVISIONS FOR UPGRADED TRANSPONDER EQUIPMENT. FOLLOWING THE PUBLIC RESPONSE PERIOD, THE DECISION WAS MADE TO FOLLOW THE COURSE OF ACTION DESCRIBED IN THE RESPONSE TO A-78-78. INHERENT IN THAT EFFORT TO INCREASE THE NUMBER OF GROUP II TCA'S IS THE REQUIREMENT FOR TRANSPONDER EQUIPMENT WHERE NONE NOW EXIST.

From: NTSB
To: FAA
Date: 3/4/1981
Response: In order to evaluate the progress of a-78-80, and 81, we requestan updated status report. Related recommendations a-78-82 & 83 are being dealt with separately (issued on separate green sheet).

From: NTSB
To: FAA
Date: 2/26/1979
Response: Maintained in open status pending resolution.

From: FAA
To: NTSB
Date: 1/9/1979
Response: FAA LTR: WE WILL BE ISSUING AN ADVANCED NPRM IN THE NEAR FUTURE IN ORDER TO UPGRADE ALTITUDE ENCODING REQUIREMENTS. OUR NOTICE OF PROPOSED RULE MAKING DISCUSSED UNDER RECOMMENDATION A-78-80 WILL PERMIT US TO ACCOMPLISH THE INTENT OF THIS RECOMMENDATION.