FTW94LA105

NTSB accident investigation · Cessna 150M · Steamboat Sprgs, CO · March 19, 1994

Accident · No injuriesLimited investigationFinal report
Date
March 18, 1994, 17:30 local (Mar 19, 1994, 00:30 UTC)
Place
Steamboat Sprgs, CO
Injuries
1 uninjured
Damage
Substantial damage
Phase of flight
Enroute
Aircraft
N233DBCessna 150M
Weather
Visual (VMC) · Day
Status
Completed · report November 14, 1994
Report
Approved by Office Director
FAA report
19940318007199A
Case key
19015

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 selection of too low an altitude in high mountainous terrain.

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.

In flight encounter with weatherCruise - normal
In-flight planning/decision - improperPilot in commandCause
Proper altitude - not selectedPilot in commandCause
Weather condition - downdraftCause
In flight collision with terrain/waterDescent - uncontrolled
Terrain condition - snow covered
Terrain condition - mountainous/hilly

Analysis

The pilot encountered strong winds aloft when he entered a mountain pass at 10,500 feet MSL. He then experienced a severe downdraft that caused an 800 foot altitude loss, putting the airplane below the ridge line. The pilot attempted to turn away from the ridge but was unable to clear the terrain. He flared the airplane to reduce forward airspeed and impacted deep snow.

Factual narrative

On March 18, 1994, at 1730 mountain standard time, a Cessna 150M, N233DB, was substantially damaged when it impacted terrain about 10 miles northeast of Steamboat Springs, Colorado. The private pilot was not injured. Visual meteorological conditions prevailed.

According to the pilot, the wind was strong when he entered a mountain pass at 10,500 feet MSL (mean sea level). In his pilot/operator report, he wrote: "I encountered a severe downdraft, causing me to lose 800 feet. I was now looking up at the ridge that I was looking down on only seconds before. I attempted to turn away from the ridge but it was too late. I flared just before impact reducing my forward speed. The plane came to rest on a fairly flat spot some 100 feet from the top of the ridge."

Aircraft

Registration
N233DB
Reported as
Cessna 150M
Category
Airplane
Serial number
15079036
Airframe hours
2,288
Engine
Lycoming O-320-E2D, 150 horsepower, reciprocating
Damage
Substantial damage
Flight
Personal · Part 91
Registered owner
Willbur, Gerald R & Rosemary L
Airworthiness certificate
Standard, Normal; Standard, Utility
Last inspection
Annual · May 28, 1993 · 97 hours before
Departed
SNY · Sidney, NE
Destination
CAG · Craig, CO
Flight plan
VFR

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
59
Certificate
Private
Airplane ratings
Single-engine land
Medical
Class 3, Valid Medical--w/ waivers/lim
Seat
Left
Flight hours
389 total · 127 in this make and model · 69 in the last 90 days · 38 in the last 30 days · 8 in the last 24 hours

Weather

Conditions
Visual (VMC) · Day
Wind
200° at 2 knots
Visibility
30 statute miles
Lowest ceiling
10,000 ft broken
Temperature
48 °F
Altimeter
29.00 inHg
Observed at
SBS, 12 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.