ASRS REPORT: 80099
| Data Source |
AVIATION SAFETY REPORTING SYSTEM |
| Report Number |
80099 |
| Local Date |
01-JAN-88 |
| Local Time |
1201-1800 |
Synopsis
CTLR DESCENDED ACR MLG TO AVOID ONE ACR LGT INTO ANOTHER ACR LGT 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 |
WV |
| Loc Ref ATC Name |
EKN |
| Horizontal Miss Distance (ft) |
11400 |
| Verical Miss Distance (ft) |
1500 |
| Magnetic Bearing (deg) |
11400 |
| Magnetic Bearing (deg) |
180 |
| Reference ID Distance (nm) |
25 |
| Altitude MSL - Single Value(ft)
| 31000 |
Environmental Information
| Weather Conditions |
VMC |
| Light Condition |
DAYLIGHT
|
AIRCRAFT INFORMATION
Aircraft 1
| Acft Make/Model Desc |
MEDIUM LARGE TRANSPORT, LOW WING, 2 TURBOJET ENG |
| Acft Operator Desc |
AIR CARRIER |
| Acft Flight Mission |
PASSENGER |
| Acft Flight Phase |
DESCENT |
| Acft Flight Plan |
IFR |
| Flight Crew Count |
2 |
Aircraft 2
| Acft Make/Model Desc |
LARGE TRANSPORT, LOW WING, 3 TURBOJET ENG |
| Acft Operator Desc |
AIR CARRIER |
| Acft Flight Mission |
PASSENGER |
| Acft Flight Phase |
CRUISE |
| Acft Flight Plan |
IFR |
| Flight Crew Count |
3 |
Aircraft 3
| Acft Make/Model Desc |
LARGE TRANSPORT, LOW WING, 3 TURBOJET ENG |
| Acft Operator Desc |
AIR CARRIER |
| Acft Flight Mission |
PASSENGER |
| Acft Flight Phase |
CRUISE |
| Acft Flight Plan |
IFR |
| Flight Crew Count |
3 |
PERSON INFORMATION
Information For Person Sequence 1
| Reporting Organization |
GOVERNMENT |
| ATC Exp Military (yrs) |
4 |
| ATC Exp Radar (yrs) |
19 |
| ATC Function |
ENROUTE |
| ATC Qual Desc |
FULLY CERTIFIED |
Narrative
TFC HEAVY AND COMPLEX. MLG X CONVERGING WITH LGT Z AT FL330. I DESCENDED MLG X TO FL290, CONFLICT ALERT WAS ACTIVATED WITH MLG X AND LGT Y AT FL310. MLG X WAS TOLD TO CLIMB IMMEDIATELY BACK TO FL330, RESULTING IN A SYSTEM ERROR OF 1500' VERTICAL AND 1.9 HORIZONTAL. AT THE SAME TIME OF THIS INCIDENT AN ACFT FLIGHT NBOUND TO PIT WAS NORAC, ANOTHER ACR FLT ALSO NBOUND TO PIT TEMPORARILY LOST HIS TRANSPONDER(THE ALL PRIMARY WAS BEING DISPLAYED), AND LGT Z HAD NOT BEEN SWITCHED OVER FROM ZID CRW-HIGH. DUE TO CONTINUOUS FREQUENCY PROBLEM I WAS TRANSMITTING ON THE EKN RCAG AND RECEIVING ON THE BUCKS ELBOW RCAG SITE. THE IMMEDIATE ALERT READOUT SHOWED A LATERAL SEPARATION OF 1.9 NM. THIS INCIDENT OCCURRED IN AN AREA OF FREQUENTLY REPORTED BEACON SPLITS. FOR SEVERAL COMPUTER UPDATES DURING THIS OCCURRENCE. THERE WERE FIVE OR MORE TARGETS IN THIS IMMEDIATE AREA. THERE MAY HAVE BEEN MORE OR LESS THAN THE 1.9 NM SEPARATION.
Information For Person Sequence 2
| Reporting Organization |
GOVERNMENT |
| ATC Exp Radar (yrs) |
19 |
| ATC Qual Desc |
FULLY CERTIFIED |
Narrative
Information For Person Sequence 3
| Reporting Organization |
AIR CARRIER |
| Flt Crew Exp (last 90 days) |
100 |
| Flt Crew Total Exp |
14000 |
| Flt Crew Exp |
10000 |
| 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
Information For Person Sequence 5
| Flt Crew Function |
PILOT FLYING |
Narrative
END REPORT