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