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NTSB Report
July 7, 1992 · Cessna 172N · N6376F
St Paul, MN
Overview
Report Status
Probable Cause
Event Type
Accident
Date
July 7, 1992
Injury Outcomes
4 injuries (4 fatalities)
Location
St Paul, MN
Aircraft
Cessna 172N
Tail Number
N6376F
Operator
Wings
Injuries
Fatal
Aircraft Damage
Destroyed
NTSB Number
CHI92FA201
A STUDENT & AN INSTRUCTOR (CFI) IN CESSNA 172, N6376F (76F), WERE PRACTICING TOUCH-&-GO LNDGS AS CESSNA 172, N5279R (79R), WAS ARRIVING (TRANSPORTING BLOOD FOR THE RED CROSS). AT 1640 CDT, 79R RPRTD 7 MI SE FOR LNDG. THE TWR CTLR SAW A TARGET IN THAT VCNTY (USING D-BRITE RADAR); HE TOLD 79R TO ENTER A LEFT DWNWND FOR RWY 12 & RPRT 2 MI SE. HE WAS RELIEVED AT 1643 BY A DEVELOPMENTAL CTLR (DC) & A FULL PERFORMANCE CTLR (FPC). HE BRIEFED THEM ON PSNS OF ACFT IN THE PATTERN & TOLD THEM 79R (STILL OUT OF SIGHT) WAS INBOUND FM THE SE, BUT HE DIDN'T SHOW THEM ITS PSN ON RADAR DRG THE BRIEFING. AT 1644:55, 79R MADE A CALL, SAYING THE ACFT WAS 'PRACTICALLY STRAIGHT EAST OF THE AIRPORT.' 79R NEVER RPRTD ON DWNWND, ALTHO TOLD AGAIN TO DO SO. THE CTLRS WERE WORKING SVRL ACFT; THEY NEITHER SIGHTED 79R, NOR USED RADAR TO FIND IT. AT 1647:06, 79R CALLED TURNING BASE FOR RWY 12. AT THAT TIME, 79R WAS TRACKING INSIDE THE FLT PATH OF 76F, AS 76F WAS IN A LEFT TURN TO FINAL APCH FOR RWY 14. ABT 25 SEC LTR, THE 2 CONVERGED, COLLIDED, THEN CRASHED TO THE GND.
NTSB Probable Cause
INADEQUATE VISUAL LOOKOUT BY THE PILOTS OF BOTH AIRPLANES, WHICH RESULTED IN THEIR FAILURE TO SEE-AND-AVOID CONFLICTING TRAFFIC, AND FAILURE OF THE RELIEVING CONTROLLERS TO USE THE RADAR DISPLAY TO IDENTIFY AND SEQUENCE AN AIRPLANE ENTERING THE PATTERN. FACTORS RELATED TO THE ACCIDENT WERE: AN INADEQUATE BRIEFING BY THE OFF-GOING CONTROLLER, AND INACCURATE POSITION REPORTS BY THE PILOT-IN-COMMAND OF N5279R.
Full Narrative
A STUDENT & AN INSTRUCTOR (CFI) IN CESSNA 172, N6376F (76F), WERE PRACTICING TOUCH-&-GO LNDGS AS CESSNA 172, N5279R (79R), WAS ARRIVING (TRANSPORTING BLOOD FOR THE RED CROSS). AT 1640 CDT, 79R RPRTD 7 MI SE FOR LNDG. THE TWR CTLR SAW A TARGET IN THAT VCNTY (USING D-BRITE RADAR); HE TOLD 79R TO ENTER A LEFT DWNWND FOR RWY 12 & RPRT 2 MI SE. HE WAS RELIEVED AT 1643 BY A DEVELOPMENTAL CTLR (DC) & A FULL PERFORMANCE CTLR (FPC). HE BRIEFED THEM ON PSNS OF ACFT IN THE PATTERN & TOLD THEM 79R (STILL OUT OF SIGHT) WAS INBOUND FM THE SE, BUT HE DIDN'T SHOW THEM ITS PSN ON RADAR DRG THE BRIEFING. AT 1644:55, 79R MADE A CALL, SAYING THE ACFT WAS 'PRACTICALLY STRAIGHT EAST OF THE AIRPORT.' 79R NEVER RPRTD ON DWNWND, ALTHO TOLD AGAIN TO DO SO. THE CTLRS WERE WORKING SVRL ACFT; THEY NEITHER SIGHTED 79R, NOR USED RADAR TO FIND IT. AT 1647:06, 79R CALLED TURNING BASE FOR RWY 12. AT THAT TIME, 79R WAS TRACKING INSIDE THE FLT PATH OF 76F, AS 76F WAS IN A LEFT TURN TO FINAL APCH FOR RWY 14. ABT 25 SEC LTR, THE 2 CONVERGED, COLLIDED, THEN CRASHED TO THE GND.
Flight
Event TypeAccident
Event Time16:48 CDT
Nearest AirportDowntown Holman Field (1nm NW)
Runway14
Runway Length6711 ft
Runway Width150 ft
Flight Plan FiledNone
Aircraft FireNo
Aircraft ExplosionNo
Aircraft
AircraftCessna 172N
Tail NumberN6376F
Aircraft CategoryAir
DamageDestroyed
OperatorWings
Operating RulePart 91
Engines1
Engine TypeReciprocating
Engine DetailsLycoming · O-320-H2AD · Reciprocating · 160 | Lycoming · O-320-E2D · Reciprocating · 150
Seats4
People & Injuries
Injury Summary4 injuries (4 fatalities)
Fatal4
Serious0
Minor0
Uninjured0
Total4
Crew 1Age 42 · First Class
Crew 2Age 77 · Second Class
Conditions
ConditionsVMC
LightDaylight
Wind150° @ 5 kt
Visibility5 sm
CeilingOvercast 10000 ft
Temperature / Dew Point66 F
Altimeter29.00 inHg
Observation Time21:45
Weather SourceWFAC