DEN90FA033

NTSB accident investigation · Beech B35-A33 · Castle Rock, CO · December 16, 1989

Accident · FatalField investigationFinal report
Date
December 16, 1989, 13:44 local (20:44 UTC)
Place
Castle Rock, CO
Injuries
2 fatal
Damage
Destroyed
Phase of flight
Approach
Aircraft
N477TBeech B35-A33
Weather
Instrument (IMC) · Day
Status
Completed · report June 25, 1992
Report
Approved by Office Director
FAA report
19891216051339A
Case key
17813

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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Probable cause

The pilot's loss of control as a result of spatial disorientation. Factors related to the accident were: the adverse weather conditions.

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 flightApproach - iaf to faf/outer marker (ifr)
Weather condition - obscurationFactor
Preflight briefing service - not attainedPilot in command
Spatial disorientationPilot in commandCause
Weather condition - snowFactor
Ifr procedure - improperPilot in commandCause
Lack of recent instrument timePilot in commandFactor
Weather condition - fogFactor
Weather condition - low ceilingFactor
Proper altitude - not maintainedPilot in commandCause
In flight collision with terrain/waterDescent - uncontrolled

Analysis

A VFR flight plan had been filed but, while enroute to denver it was changed to an IFR flight plan when the pilot realized the weather had deteriorated to instrument meteorological conditions. The pilot acknowledged a clearance for an ILS approach into centennial airport, englewood, Colorado, but during the approach he said that he was '...all turned around and was having trouble controlling the aircraft.' There was no further contact with the pilot and the aircraft failed to arrive at the airport. A search was conducted and the aircraft wreckage was found shortly after daybreak the following morning. Radar information confirmed that the pilot was flying in circles and had not established himself on the approach.

Aircraft

Registration
N477T
Reported as
Beech B35-A33
Category
Airplane
Serial number
CD-305
Airframe hours
1,921
Engine
Continental IO-470-K3, 225 horsepower, reciprocating
Damage
Destroyed
Flight
Personal · Part 91
Registered owner
Leroy Evans Bates, Jr.
Airworthiness certificate
Standard, Normal
Last inspection
Annual · November 3, 1989 · 8 hours before
Departed
DHT · Dalhart, TX
Destination
APA · Englewood, CO
Flight plan
VFR/IFR
Airport
APA · Centennial, runway 35R, 10,001 × 100 ft, asphalt

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
58
Certificate
Commercial
Airplane ratings
Single-engine land
Instrument ratings
Airplane
Medical
Class 2, Valid Medical--w/ waivers/lim
Seat
Left
Toxicology
Performed
Flight hours
1,554 total · 63 in this make and model · 1,353 as pilot in command · 12 in the last 90 days · 1 in the last 30 days

Weather

Conditions
Instrument (IMC) · Day
Wind
360° at 8 knots
Visibility
1 statute miles
Lowest ceiling
300 ft
Temperature
18 °F, dew point 16 °F
Altimeter
29.00 inHg
Observed at
APA, 8 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.