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NTSB Report
March 31, 1987 · Dassault-Breguet 50 · N52DC
Cleveland, OH
Overview
Report Status
Preliminary report
Event Type
Incident
Date
March 31, 1987
Injury Outcomes
No injuries (6 uninjured)
Location
Cleveland, OH
Aircraft
Dassault-Breguet 50
Tail Number
N52DC
Operator
Dow Chemical
Injuries
None
NTSB Number
CHI87IA112
AN OPNL ERROR DEVELOPED AS A FALCON 50, N52DC, WAS PROCEEDING SE TOWARD THE DRYER VOR AT FL290 & NORTHWEST FLT 427 WAS PROCEEDING WESTBOUND AT THE SAME ALT TOWARD THE SAME FIX (DRYER VOR). WHEN THE FULL PERFORMANCE LVL (FPL) CONTROLLER (CTLR) SAW THE SITUATION DEVELOPING, HE PROVIDED AVOIDANCE VECTORS TO EACH ACFT. HOWEVER, THEY PASSED EACH OTHER WITH ABOUT 1.5 MI HORIZONTAL SEPN & 800' VERTICAL SEPN. THE WORKLOAD HAD BECOME HEAVY & COMPLEX JUST PRIOR TO THE OCCURRENCE. AS THE TRACKER WAS NOTIFYING THE FPL CTLR OF THE CONFLICT, THE CONFLICT ALERT WAS ACTIVATED.
Full Narrative
AN OPNL ERROR DEVELOPED AS A FALCON 50, N52DC, WAS PROCEEDING SE TOWARD THE DRYER VOR AT FL290 & NORTHWEST FLT 427 WAS PROCEEDING WESTBOUND AT THE SAME ALT TOWARD THE SAME FIX (DRYER VOR). WHEN THE FULL PERFORMANCE LVL (FPL) CONTROLLER (CTLR) SAW THE SITUATION DEVELOPING, HE PROVIDED AVOIDANCE VECTORS TO EACH ACFT. HOWEVER, THEY PASSED EACH OTHER WITH ABOUT 1.5 MI HORIZONTAL SEPN & 800' VERTICAL SEPN. THE WORKLOAD HAD BECOME HEAVY & COMPLEX JUST PRIOR TO THE OCCURRENCE. AS THE TRACKER WAS NOTIFYING THE FPL CTLR OF THE CONFLICT, THE CONFLICT ALERT WAS ACTIVATED.
Flight
Event TypeIncident
Event Time15:57 EST
Nearest Airport0nm N
Runway0
Flight Plan FiledIFR
Aircraft FireNo
Aircraft ExplosionNo
Aircraft
AircraftDassault-Breguet 50
Tail NumberN52DC
Aircraft CategoryAir
OperatorDow Chemical
Operating RulePart 91
Engines3
Engine TypeTurbofan
Engine DetailsAiresearch · TFE 731-3-1C · Turbofan · 3700
Seats15
People & Injuries
Injury SummaryNo injuries (6 uninjured)
Fatal0
Serious0
Minor0
Uninjured6
Total6
Crew 1Age 47 · First Class
Conditions
ConditionsVMC
LightDaylight
WindCalm
Visibility10 sm
CeilingNone
Temperature / Dew Point0 C / 0 C
Altimeter0
Weather SourcePILO