ARTCC INTERFAC COORD ACR X HAD LTSS FROM ACR Y. SYS ERROR.

1992-07 · NASA ASRS report 217441

Date: 1992-07 · Aircraft: Widebody; Low Wing; 4 Turbojet Eng

Anomalies: atc-issue-all-types|conflict-airborne-conflict|deviation-discrepancy-procedural-published-material-policy

Synopsis

ARTCC INTERFAC COORD ACR X HAD LTSS FROM ACR Y. SYS ERROR.

Narrative

THE WABASH CTLR SAID IT WOULD BE 1 MIN BEFORE HE COULD CLB ACR Y DUE TO TFC AT FL350. CONFLICT ALERT STARTED BTWN ACR Y AND ACR AT FL330. THE WABASH CTLR ASKED AND TURNED ACR Y TO A 090 HDG. ACR Y SAID HE COULD ONLY TURN TO A 105 HDG AND WAS TOO HVY FOR FL370. (THAT INFO NOT PASSED BACK TO THE INDY CTLR). INDY TAKES A HDOF ON ACR X DSNDING TO FL310. ACR X IS BEING WORKED BY A CTLR 3 SECTORS AWAY. (POINTED OUT TO THE 2 SECTORS BTWN). ACR X IS DIRECT OKK LNDG ORD. ACR Y IS NOW FLASHING (IN HDOF) TO PATTERSON SUPER HIGH STILL IN INDY HIGH'S AIRSPACE BEING WORKED BY WABASH. ACR X IS FLASHING AT INDY HIGH SECTOR POINTED OUT TO PATTERSON AND DAYTON SECTORS. WABASH CALLS PATTERSON ON THE HDOF ON ACR Y. PATTERSON ASKED WHY 'ACR Y WAS SO FAR N.' WABASH SAID; 'BECAUSE OF WX AND TFC.' ACR X WAS NOT MENTIONED ON THE HDOF CALL. ACR X HAD CHKED ON INDY'S FREQ LEAVING FL340 FOR FL310. NOT ANSWERED; ACR X CHKED ON AGAIN 40 SECONDS LATER LEAVING FL330 FOR FL310. CONFLICT ALERT GOES OFF. ACR Y STILL BEING WORKED BY WABASH IS TURNED TO A 180 HDG NOT MENTIONED TO ANYONE. ACR X TURNED TO A 230 HDG; HAS SLOWED THE DSCNT. A DEP GOES OFF WITH ABOUT 1000 FT. SUPPLEMENTAL INFO FROM ACN 217442: I WAS WORKING THE FFO SH RADAR POS AT ZID. ACR X WAS POINTED OUT TO ME BY THE SME RADAR CTLR DIRECT CVG AT FL390. HE WAS BEING RERTED CVG VHP OKK TO ORD DUE TO NUMEROUS TSTMS IN THE AREA. I RECEIVED A SECOND POINTOUT WHEN THE ACFT WAS NW OF CVG DSNDING TO FL350. A THIRD CALL WAS MADE REQUESTING RELEASE ON ACR X TO FL310. ALL POINTOUTS WERE APPROVED AS THERE WAS NO TFC SITUATION. I NOTICED THAT ACR X WAS THEN HANDED OFF AND ACCEPTED BY THE IND HI RADAR CTLR DSNDING TO FL310. A HDOF WAS THEN INITIATED TO ME ON ACR Y AT FL330. HIS TRACK WAS APPROX 080 DEGS. I QUESTIONED THE HDOF BECAUSE HIS FILED RTE OF FLT WAS VHP J24 FLM ON COURSE. IF HE HAD BEEN ON COURSE; HE NEVER WOULD'VE COME INTO MY SECTOR. AT THAT TIME; I RECEIVED AN OVERRIDE CALL. I HEARD IN THE BACKGROUND A HDG OF 180 DEGS ISSUED TO ACR Y. THE CALLING CTLR TOLD ME THAT ACR Y WAS GOING TO 'HIT MY AIRSPACE.' I BELIEVED THAT STEPS WERE BEING TAKEN TO SEPARATE ACR Y AND ACR X. I SAW THAT ACR X WAS RADAR CONTACT WITH IND HI RADAR AND BELIEVED THEY WERE ALSO WORKING ACR Y. IN FACT; ACR Y WAS BEING WORKED BY THE WABASH CTLR WHO ONLY OWNED FL350 AND ABOVE. I TRIED TO ESTABLISH RADIO CONTACT WITH ACR X IN THE CHANCE HE MIGHT BE ON MY FREQ. THERE WAS NO REPLY. ACFT PASSED WITH LESS THAN STANDARD CTR SEPARATION. 2 FACTORS LEADING TO THIS ERROR I THINK ARE OF MAJOR IMPORTANCE. I BELIEVE THAT ZID'S TFC MGMNT UNIT DOES NOT DO ENOUGH TO HELP THE CTLR INSIDE OF ZID. FLOW CTL RESTRICTIONS ARE POSTED CONSTANTLY ON US FROM OTHER CTRS; MAKING IT EASIER FOR THEM AND MORE DIFFICULT FOR US. WX: IN THE PREVIOUS MONTH; ZID HAS HAD TO DEAL WITH SEVERE WX ABOUT 75 PERCENT OF THE TIME. HAVING TO WORK UNDER THESE CONDITIONS HAS GOTTEN THE ZID CTLRS TO THE POINT WHERE THEY ARE 'SHELL SHOCKED.' NOTHING CAN BE DONE ABOUT THE WX; BUT IN REF TO POINT 1; I THINK MORE COULD BE DONE BY ZID TFC MGMNT UNIT TO HELP THE CTLRS.

Source: NASA Aviation Safety Reporting System (public domain). Reports are voluntary submissions and are not verified by NASA.

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