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Safety Recommendation Details

Safety Recommendation A-72-204
Details
Synopsis: A HUGHES AIR WEST DC-9, N9345, AND A U.S. MARINE CORPS F-4B, 151458, COLLIDED IN FLIGHT NEAR DUARTE, CALIFORNIA, AT APPROXIMATELY 1811 P.D.T., JUNE 6, 1971. ALL 49 OCCUPANTS ABOARD THE DC-9 AND THE PILOTOF THE F-4B WERE FATALLY INJURED. THE RADAR INTERCEPT OFFICER, THE ONLY OTHER OCCUPANT OF THE F-4B, EJECTED SAFELY AFTER THE COLLISION.THE DC-9 WAS CLIMBING TO FLIGHT LEVEL 330 UNDER RADAR CONTROL OF THE LOS ANGELES AIR ROUTE TRAFFIC CONTROL CENTER, AND THE F-4B WAS EN ROUTE TO MCAS EL TORO AT APPROXIMATELY 15,500 FEET, IN ACCORDANCE WITH VISUAL FLIGHT RULES. THE COLLISION OCCURRED AT APPROXIMATELY 15,150 FEET. THE VISIBILITY IN THE AREA, AT THE TIME OF THE ACCIDENT, WAS GOOD, AND THERE WERE NO CLOUDS BETWEEN THE TWO AIRCRAFT.
Recommendation: REVIEW RADAR PERFORMANCE MONITORING PROCEDURES TO ASSURE THAT ALL RADAR FACILITIES ARE CAPABLE OF RECEIVING CODE 7700 TRANSPONDER RETURNS.
Original recommendation transmittal letter: PDF
Overall Status: Closed - Unacceptable Action
Mode: Aviation
Location: Duarte, CA, United States
Is Reiterated: No
Is Hazmat: No
Is NPRM: No
Accident #: DCA71A0010
Accident Reports: Hughes Airwest DC-9, N9345, and U.S. Marine Corps F-4B, 151458
Report #: AAR-72-26
Accident Date: 6/6/1971
Issue Date: 7/21/1971
Date Closed: 2/23/1973
Addressee(s) and Addressee Status: FAA (Closed - Unacceptable Action)
Keyword(s):

Safety Recommendation History
From: FAA
To: NTSB
Date: 12/5/1972
Response: ALL FAA RADARS HAVE THE CAPABILITY TO RECEIVE CODE 7700. EMERGENCY DECODING IS ONE OF RADAR MAINTENANCE'S KEY PERFORMANCE PARAMETERS CHECKED IN PERIODIC INSPECTIONS AND EVALUATIONS. THEY DO NOT BELIEVE ADDITIONAL MONITORING IS REQUIRED.