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Aviation safety reports, made easier to study

NTSB Reports is an independent research and search tool for public aviation accident and incident records. It brings NTSB aviation reports, structured fields, docket files, extracted figures, photos, videos, and update history into one searchable interface.

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NTSB Report

March 30, 1994 · Cessna 210D · N3820Y

Cobalt, ID

Overview

Report Status
Final with probable cause
Event Type
Accident
Date
March 30, 1994
Injury Outcomes
No injuries (4 uninjured)
Location
Cobalt, ID
Aircraft
Cessna 210D
Tail Number
N3820Y
Operator
Gregersen Marvin D
Injuries
None
Aircraft Damage
Substantial
NTSB Number
SEA94LA093

AFTER LANDING ON THE 2300-FT TURF STRIP, THE PILOT WAS UNABLE TO STOP THE AIRPLANE BEFORE OVERRUNNING THE UPWIND END INTO A CREEK. THE PILOT REPORTED THAT THE GRASS WAS COVERED WITH A HALF-MELTED COAT OF FROST RENDERING THE BRAKES INEFFECTIVE; THE TEMPERATURE WAS 35 DEGS F. RISING TERRAIN AT THE UPWIND END PRECLUDED A GO-AROUND. THE PILOT ALSO REPORTED THAT HE HAD NOT FLOWN INTO THE AIRSTRIP FOR SEVERAL YEARS.

NTSB Probable Cause

THE PILOT SELECTED UNSUITABLE TERRAIN FOR LANDING. FACTORS IN THE ACCIDENT WERE: THE WET RUNWAY AND RISING TERRAIN THAT PRECLUDED A GO-AROUND.

Full Narrative

On March 30, 1994, approximately 0745 hours mountain standard time (mst), a Cessna 210D, N3820Y, registered to and being flown by Marvin D. Gregersen, a certificated commercial pilot, was substantially damaged when it overran the upwind end of the east runway at the Taylor private airstrip 23 miles west of Cobalt, Idaho. The pilot and three passengers were uninjured. Visual meteorological conditions existed and no flight plan had been filed. The flight, which was personal in nature, was to have been operated in accordance with 14CFR91, and originated from Boise, Idaho, at 0645 hours. The pilot reported that he touched down at the intended point on the 2300 foot turf strip, landing eastbound and slightly uphill. He reported that the sun had just come up, that the winds were calm, and the temperature was approximately 35 degrees Fahrenheit. He also indicated that there was melting frost on the runway surface, that he was unable to stop the aircraft using brakes and retracted flaps, and that rising terrain precluded a go around. The aircraft subsequently overran the upwind end of the runway. The pilot reported no mechanical malfunction with the aircraft or its brakes, and told the investigator that it had been several years since he had last flown into the Taylor airstrip.

Flight

Event TypeAccident
Event Time07:45 MST
Nearest AirportTaylor Ranch (0nm)
Runway9
Runway Length2300 ft
Runway Width150 ft
Flight Plan FiledNone
Aircraft FireNo
Aircraft ExplosionNo

Aircraft

AircraftCessna 210D
Tail NumberN3820Y
Aircraft CategoryAir
DamageSubstantial
OperatorGregersen Marvin D
Operating RulePart 91
Engines1
Engine TypeReciprocating
Engine DetailsContinental · IO-520-A5B · Reciprocating · 285
Seats6

People & Injuries

Injury SummaryNo injuries (4 uninjured)
Fatal0
Serious0
Minor0
Uninjured4
Total4
Crew 1Age 67 · Second Class

Conditions

ConditionsVMC
LightDaylight
WindCalm
Visibility50 sm
CeilingNone
Temperature / Dew Point36 C / 0 C
Altimeter30.00 inHg
Observation Time14:45
Weather SourcePILO

Appendix: Source Data