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NTSB Report
July 23, 1990 · Olsen Pursuit · N23GG
Fowler, CO
Overview
Report Status
Probable Cause
Event Type
Accident
Date
July 23, 1990
Injury Outcomes
2 injuries (2 fatalities)
Location
Fowler, CO
Aircraft
Olsen Pursuit
Tail Number
N23GG
Injuries
Fatal
Aircraft Damage
Destroyed
NTSB Number
DEN90DTE04
WHILE ON A LOCAL FLT, THE ACFT IMPACTED THE GND ABOUT 3/10 OF A MILE SHORT OF RWY 4. THERE WERE NO KNOWN WITNESS TO THE ACDNT, THOUGH ONE PERSON SAW DUST FROM THE ACDNT SITE & WENT TO INVESTIGATE. THE AIRCRAFT CAME TO REST ON ITS BELLY & BURNED. THERE WAS EVIDENCE THAT THE ACFT HAD IMPACTED IN A LEVEL ATTITUDE, BUT THERE WAS NO APPARENT FORWARD MOVEMENT OF THE ACFT AFTER PRINCIPAL IMPACT. NO PREIMPACT PART FAILURE OR MALFUNCTION OF THE ACFT OR ENG WAS FOUND DURING THE INVESTIGATION. TOXICOLOGY EXAMS OF THE PLT'S & PSGR'S BLOOD SHOWED A CARBOXYHEMOGLOGIN (CARBON MONOXIDE) SATURATION OF 19% & 16%, RESPECTIVELY. THE TOXICOLOGIST NOTED THAT SMOKERS WOULD BE EXPECTED TO HAVE A SATURATION LEVEL OF 3% TO 10%. ALSO, METABOLITES OF MARIJUANA (CARBOXYLE ACID) WERE FND IN THE PLT'S & PSGR'S BLOOD AT LOW LEVELS OF 9 & 7 NG/ML, RESPECTIVELY. THE SPECIFIC SOURCE OF CARBON MONOXIDE WAS NOT DETERMINED.
NTSB Probable Cause
FAILURE OF THE PILOT TO MAINTAIN ADEQUATE AIRSPEED ON FINAL APPROACH TO LAND, WHICH RESULTED IN AN INADVERTENT STALL. A FACTOR RELATE TO THE ACCIDENT WAS: THE PILOT'S PHYSICAL IMPAIRMENT FROM CARBON MONOXIDE.
Full Narrative
WHILE ON A LOCAL FLT, THE ACFT IMPACTED THE GND ABOUT 3/10 OF A MILE SHORT OF RWY 4. THERE WERE NO KNOWN WITNESS TO THE ACDNT, THOUGH ONE PERSON SAW DUST FROM THE ACDNT SITE & WENT TO INVESTIGATE. THE AIRCRAFT CAME TO REST ON ITS BELLY & BURNED. THERE WAS EVIDENCE THAT THE ACFT HAD IMPACTED IN A LEVEL ATTITUDE, BUT THERE WAS NO APPARENT FORWARD MOVEMENT OF THE ACFT AFTER PRINCIPAL IMPACT. NO PREIMPACT PART FAILURE OR MALFUNCTION OF THE ACFT OR ENG WAS FOUND DURING THE INVESTIGATION. TOXICOLOGY EXAMS OF THE PLT'S & PSGR'S BLOOD SHOWED A CARBOXYHEMOGLOGIN (CARBON MONOXIDE) SATURATION OF 19% & 16%, RESPECTIVELY. THE TOXICOLOGIST NOTED THAT SMOKERS WOULD BE EXPECTED TO HAVE A SATURATION LEVEL OF 3% TO 10%. ALSO, METABOLITES OF MARIJUANA (CARBOXYLE ACID) WERE FND IN THE PLT'S & PSGR'S BLOOD AT LOW LEVELS OF 9 & 7 NG/ML, RESPECTIVELY. THE SPECIFIC SOURCE OF CARBON MONOXIDE WAS NOT DETERMINED.
Flight
Event TypeAccident
Event Time19:05 MDT
Nearest AirportFOWLER (0nm N)
Runway4
Runway Length3400 ft
Runway Width75 ft
Flight Plan FiledNone
Aircraft FireGrd
Aircraft ExplosionNo
Aircraft
AircraftOlsen Pursuit
Tail NumberN23GG
Aircraft CategoryAir
DamageDestroyed
Operating RulePart 91
Engines1
Engine TypeReciprocating
Engine DetailsLycoming · O-320-E2C · Reciprocating · 150
Seats2
People & Injuries
Injury Summary2 injuries (2 fatalities)
Fatal2
Serious0
Minor0
Uninjured0
Total2
Crew 1Age 35 · Third Class
Conditions
ConditionsVMC
LightDaylight
Wind100° @ 10 kt
Visibility40 sm
CeilingNone
Temperature / Dew Point70 F / 57
Altimeter30.00 inHg
Observation Time00:50
Weather SourceWFAC