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Safety Recommendation Details

Safety Recommendation A-72-201
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: INSTALL AN OPEN "AREA" MICROPHONE AT EACH TERMINAL AND CENTER SECTOR POSITION TO RECORD ALL CONVERSATION AT THE CONTROL POSITIONS.
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: 7/10/1973
Addressee(s) and Addressee Status: FAA (Closed - Unacceptable Action)
Keyword(s):

Safety Recommendation History
From: NTSB
To: FAA
Date: 7/10/1973
Response: Closed Unacceptable Action

From: FAA
To: NTSB
Date: 12/5/1972
Response: THEY DID EXPERIMENT IN THE PAST WITH THE OPEN "AREA" MICROPHONE AND DETERMINED THAT THE GREAT AMOUNT OF EXTRANEOUS CONVERSATION RECORDED WAS OF LITTLE CONSEQUENCE TO THE INVESTIGATION AND PRACTICALLY RENDERED THE RECORDING UNUSEABLE. THIS TYPE OF RECORDING IS NOT THE SAME AS THE COCKPIT RECORDING SINCE THE CONTROLLERS ARE ALWAYS AVAILABLE TO TESTIFY UNDER OATH TO ANY INCIDENTAL CONVERSATIONS PERTINENT TO THE ACCIDENT INVESTIGATION.