Aviation Safety Reporting System (ASRS) Brief Report(s)

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ASRS REPORT: 80140

Data Source AVIATION SAFETY REPORTING SYSTEM
Report Number 80140
Local Date 01-JAN-88
Local Time 1801-2400

Synopsis
MLT DESCENDED INTO CONFLICT WITH ACR MLG RESULTING IN LESS THAN STANDARD SEPARATION.

Assessment
Event Primary Problem HUMAN FACTORS
General Results NONE REPORTED / TAKEN
ATC Event Results ISSUED NEW CLEARANCE

Anomaly Information
ATC Anomaly Flag ALL TYPES
Conflict Anomaly Desc AIRBORNE CONFLICT
Anomaly Detected - Person Desc AIR TRAFFIC CONTROL
Anomaly Detected - Auto Desc AIR TRAFFIC CONTROL

Location Information
Loc State Code KY
Loc Ref ATC Name 11U
Horizontal Miss Distance (ft) 21000
Verical Miss Distance (ft) 400
Magnetic Bearing (deg) 21000
Reference ID Distance (nm) 55
Altitude MSL - Single Value(ft) 35000

Environmental Information
Weather Conditions VMC
Light Condition NIGHT
WX Elements Visual (sm) 20


AIRCRAFT INFORMATION

Aircraft 1
Acft Make/Model Desc MILITARY TRANSPORT
Acft Operator Desc MILITARY
Acft Flight Phase DESCENT
Acft Flight Plan IFR
Flight Crew Count 2

Aircraft 2
Acft Make/Model Desc MEDIUM LARGE TRANSPORT, LOW WING, 2 TURBOJET ENG
Acft Operator Desc AIR CARRIER
Acft Flight Mission PASSENGER
Acft Flight Phase CRUISE
Acft Flight Plan IFR
Flight Crew Count 2


PERSON INFORMATION

Information For Person Sequence 1

Reporting Organization GOVERNMENT
ATC Exp Radar (yrs) 19
ATC Function ENROUTE
ATC Qual Desc FULLY CERTIFIED


Narrative

I WAS THE RADAR CTLR AT THE MYS HI SECTOR ALT LIMITS FL350 AND ABOVE. ON MY FREQ WAS MLT X AT FL390 ADW TO BLV. MLT X REQUESTED FL180 DUE TO STRONG HEADWINDS AT THE HIGHER ALTS. THE WINDS WERE 275 DEGS, 130+ KTS. I CLRD MLT X TO DES TO FL370 TO REMAIN CLR OF 2 ACFT NBOUND AT FL350. AT THIS TIME I ENTERED FL180 INTO THE COMPUTER AS ASSIGNED ALT AND FL370 AS TEMPORARY ALT. ALSO, I PUT A DODECAGON ON THE RADAR TARGET OF MLT X. PRIOR TO MLT X BEING CLR OF THE NBOUND TFC, I PUT TEMPORARY ALT OF FL240 IN THE DATA BLOCK OF MLT X AND HANDED MLT X OFF TO PXV HI SECTOR. THE HANDOFF WAS IMMEDIATELY ACCEPTED BY PXV HI. WHEN MLT X WAS CLR OF MY NBOUND TFC I DESCENDED MLT X TO FL240 AND SWITCHED MLT X TO PXV HI FREQ. WHEN PXV HI ACCEPTED THE HANDOFF ON MLT X THEY PLACED AN ELECTRONIC PVD ON MY SSH ON MLG Y SWBND AT FL350. NO VERBAL POINTOUT, APPROVAL OR COORD WAS MADE BY PXV HI. MLG Y ENTERED MY SSH AIRSPACE. AFTER LISTENING TO THE TAPES AND REVIEWING THE MULTITUDES OF CHARTS AND GRAPHS THAT OUR QUALITY ASSURANCE DEPT COMES UP WITH, I FEEL SEP COULD HAVE BEEN MAINTAINED HAD THE PXV HI CTLR TAKEN ACTION SOONER AND TAKEN APPROPRIATE ACTION. NO ACTION WAS TAKEN FOR SOME TIME (1-2 MINS) AFTER MLT X CHKED ON FREQ. WHEN ACTION WAS TAKEN TO SEP MLT X FROM MLG Y THE PXV HI CTLR CLRD, "WRONG ACR MLT," TO TURN TO A HDG. THERE WAS NO RESPONSE AS THE CTLR MEANT TO TURN MLG Y. HOWEVER, IN RETROSPECT, HAD I NOT DESCENDED MLT X THIS WOULD NEVER HAVE HAPPENED. HINDSIGHT IS ALWAYS 20/20. SUPPLEMENTAL INFORMATION FROM ACN 80494: AT THE TIME I REALIZED MLT X MIGHT BE IN CONFLICTION WITH MLG Y BUT THOUGHT TO MYSELF THERE WAS PLENTY OF TIME TO GET MLT X UNDER MLG Y. (I DIDN'T REALIZE MYSTIC HAD NBOUND TFC HE WAS WAITING TO CLR). SO, I CONTINUED TO SEARCH FOR ACR FLT Z. JUST AS I FOUND THE LOCATION OF THIS FLT MLT X CALLED ON MY FREQ OUT OF FL368 FOR FL240. I SWITCHED ACR FLT Z TO THE CORRECT FREQ AND ISSUED A 30 DEG LEFT TURN TO BOTH ACFT AND TOLD MLT X TO EXPEDITE THROUGH FL330. SEP WAS LOST WITH 3.5 MI AND THE SAME ALT.

Information For Person Sequence 2

Reporting Organization GOVERNMENT
ATC Exp Non-Radar (yrs) 2
ATC Exp Radar (yrs) 1
ATC Function ENROUTE
ATC Qual Desc DEVELOPMENTAL


Narrative


Information For Person Sequence 3

Flt Crew Function PILOT FLYING


Narrative


Information For Person Sequence 4

Flt Crew Function PILOT FLYING
Flt Crew Qual Desc AIR TRANSPORT PILOT (ATP)


Narrative



END REPORT