DEN88FA030

NTSB accident investigation · Beech J35 · Knolls, UT · November 26, 1987

Accident · FatalField investigationFinal report
Date
November 25, 1987, 18:30 local (Nov 26, 1987, 01:30 UTC)
Place
Knolls, UT
Injuries
2 fatal
Damage
Destroyed
Phase of flight
Enroute
Aircraft
N2EEBeech J35
Weather
Instrument (IMC) · Night/dark
Status
Completed · report May 16, 1989
Report
Approved by Office Director
FAA report
19871125081439A
Case key
17342

From the NTSB’s public API. By law, NTSB reports can’t be used as evidence in lawsuits over the accident.

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Sequence of events

NTSB’s coding before 2008: each occurrence and phase of flight, and the causes and factors under it. The codes are defined in NTSB’s coding manual.

Loss of control - in flightCruise - normal
Weather condition - icing conditionsFactor
Weather condition - low ceilingFactor
Weather condition - snowFactor
Light condition - dark nightFactor
Became lost/disoriented - inadvertentPilot in commandCause
Spatial disorientationPilot in commandCause
Physical impairment(anoxia/hypoxia)Pilot in commandFactor
In flight collision with terrain/waterDescent - uncontrolled

Analysis

The last comm with the flt was when the plt contacted elko radio and requested the salt lake city wx. He reported that he was at 11500 ft and VFR on top. The specialist on duty was unable to provide the wx info due to a computer sys outage but recommended that the plt ctc cedar city flt watch for wx info. No rec of any further contacts by the plt could be found. Approx 1 hr later, a witness rptd seeing acft lights at a low altitude heading in a southerly direction, near the crash site. The witness stated that the wx at the time was snow and icy conditions and the state hwy patrol confirmed that blizzard conditions existed in the area. Exam of the wreckage revealed that the acft descended into the desert in a slight nose down, steep right wing down attitude on a track of 170 degrees. No evidence of mech failure/malf of the acft or its eng was found. The plt had a prior history of hypoxic problems. The alt at which he last reported was in the average sub-hypoxic range.

Aircraft

Registration
N2EE
Reported as
Beech J35
Category
Airplane
Serial number
D-5408
Airframe hours
6,701
Engine
Continental IO-470-C, 250 horsepower, reciprocating
Damage
Destroyed
Flight
Personal · Part 91
Registered owner
Hansen, Gordon L
Airworthiness certificate
Standard, Normal
Last inspection
100 hour · October 15, 1987 · 100 hours before
Departed
RHV · San Jose, CA
Destination
SLC · Salt Lake City, UT

Matched to the registry by N-number and the event date; the registry’s history has gaps, so older matches can be wrong. Compare the reported make and model.

Flight crew

As NTSB recorded them. NTSB leaves out names.

Role
Pilot
Age
49
Certificate
Commercial
Airplane ratings
Single-engine land, Multi-engine land
Instrument ratings
Airplane
Medical
Class 2, Valid Medical--no waivers/lim.
Flight hours
2,409 total · 143 in this make and model · 236 as pilot in command · 31 in the last 90 days · 20 in the last 30 days · 4 in the last 24 hours

Weather

Conditions
Instrument (IMC) · Night/dark
Wind
360° at 20 knots
Visibility
20 statute miles
Lowest ceiling
5,000 ft overcast
Temperature
37 °F, dew point 30 °F
Altimeter
30.00 inHg
Observed at
SLC, 70 nm away

FAA reports on this event · 1

The FAA’s own accident and incident reports, matched to the aircraft by N-number and date.