NTSB Identification: NYC89IA063A.
The docket is stored on NTSB microfiche number 40338.
Scheduled 14 CFR operation of AMERICAN AIRLINES
Incident occurred Friday, December 30, 1988 in ATLANTIC OCEAN
Probable Cause Approval Date: 04/19/1990
Aircraft: McDonnell Douglas DC-10, registration: N153AA
Injuries: 17 Uninjured.

NTSB investigators used data provided by various sources and may not have traveled in support of this investigation to prepare this aircraft incident report.

AMERICAN FLT 1180 (MCDONNELL-DOUGLAS DC-10) WAS NORTHBOUND OVR THE ATLANTIC OCEAN AT FLT LVL 350 AS A BRITISH ROYAL AIR FORCE VICKERS VC10 WAS CRUISING EAST AT THE SAME ALT (NON-STANDARD ALT FOR THE VC10'S DRCTN OF FLT). THEY WERE IN A NON-RADAR AIRSPACE UNDER CTL OF NEW YORK ARTCC, USING NON-DIRECT RADIO COMM THRU ARINC. BOTH WERE IN VMC, ALTHOUGH OPERG UNDER IFR RULES. THE 2 ACFT CONVERGED AS THEY CROSSED OVR ELWOD INTXN. THE VC10 PASSED IN FRONT OF FLT 1180, FM LEFT TO RGT, WITH LESS THAN REQUIRED IFR SEPN. NEITHER FLT CREW SAW THE OTR ACFT UNTIL FLT 1180 FLEW THRU THE WAKE FM THE VC10. THE CREW OF FLT 1180 THEN SAW THE VC10 FLYING AWAY AT THE SAME ALT WHICH THEY ESTD WAS LESS THAN 1 MI AWAY. THE STRIP FOR THE VC10 WAS MARKED WITH A RED UNDERLINE & AN ARROW TO DEPICT ITS DRCTN OF FLT & NON-STANDARD ALT. THE CTLR SAID SHEWAS AWARE OF THE VC10, BUT DIDN'T SEE THE STRIP FOR FLT 1180 IN THE BAY FOR ELWOD INTXN. WHEN THE CTLR ASSUMED HER DUTY PSN, THE PREVIOUS CTLR TOLD HER THE VC10 WAS CLEAR (HAD NO CONFLICTING TRAFFIC) THRU STOCK, ELWOD & DEENO INTXNS.

The National Transportation Safety Board determines the probable cause(s) of this incident to be:

IFR SEPARATION STANDARDS..NOT MAINTAINED..ATC PERSONNEL(ARTCC)


Contributing Factors

CREW/GROUP BRIEFING..INADEQUATE..ATC PERSONNEL(ARTCC)

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