NTSB Identification: ATL84IA160.
The docket is stored on NTSB microfiche number 26557.
Scheduled 14 CFR OZARK AIRLINES, INC.
Incident occurred Friday, May 04, 1984 in MOUNT VERNON, IL
Aircraft: DOUGLAS DC-9-32, registration: N923L
Injuries: 84 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.

KANSAS CITY ARTCC (ZKC) HAD CLEARED OZARK FLT 709 (A DC-9, N923L) TO CRUISE AT FL270. WHILE PROCEEDING ESE NEAR THE EDGEOF THE ZKC AREA, THE DC-9 CONVERGED ON ZORRO 11 (A FLT OF 3 F-4'S). THE F-4'S HAD BEEN CLEARED BY INDIANAPLOLIS ARTCC (ZID) TO PROCEED WESTBOUND AT FL260 TO RENDESVOUS WITH A KC-135 TANKER (SHAKE 81) TO REFUEL ON AERIAL REFUELING ROUTE AR110W. THE BEGINNING OF AR110W WAS IN THE ZID AREA; FROM THERE IT CONTINUED WESTBOUND INTO THE ZKC AREA. THE TANKER WASORBITING UNDER CONTROL OF ZKC & WAS CLEARED TO MAINTAIN BLOCK ALT FL260 TO FL290. ZID CLEARED THE F-4'S TO THE TANKER FREQ WITHOUT HANDING THEM OFF TO ZKC & WITHOUT OBTAINING APPROVAL FROM EITHER ZKC OR THE TANKER. AFTER ESTABLISHING RADIO CONTACT, THE TANKER CREW INCORRECTLY CLEARED THE F-4'S TO CLIMB TO FL270. WHEN THE ZKC CONTROLLER REALIZED THE F-4'S & DC-9 WERE CONVERGING, HE TOLD THE DC-9 CREW TO IMMEDIATELY TURN LEFT. THE DC-9 CREW SAW THE F-4'S & TOOK EVASIVEACTION. ZID HAD NOT PROPERLY COORDINATED THE F-4S' POSITION & NONE OF THE PLTS WERE INFORMED OF CONFLICTING TRAFFIC.

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

CREW/GROUP COORDINATION..IMPROPER..ATC PERSONNEL(ARTCC)

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

CREW/GROUP COORDINATION..IMPROPER..PILOT OF OTHER AIRCRAFT

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

PROCEDURES/DIRECTIVES..NOT FOLLOWED..ATC PERSONNEL(ARTCC)

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

PROCEDURES/DIRECTIVES..NOT FOLLOWED..PILOT OF OTHER AIRCRAFT

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

RADAR SEPARATION..NOT MAINTAINED..ATC PERSONNEL(ARTCC)


Contributing Factors

FLIGHT ADVISORIES..NOT USED..ATC PERSONNEL(ARTCC)

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