SEA90LA147

NTSB accident investigation · Lake LA-250 · Rawlins, WY · July 27, 1990

Accident · Minor injuriesLimited investigationFinal report
Date
July 27, 1990, 14:13 local (20:13 UTC)
Place
Rawlins, WY
Injuries
1 minor, 1 uninjured
Damage
Substantial damage
Phase of flight
Enroute
Aircraft
N14004Lake LA-250
Weather
Visual (VMC) · Day
Status
Completed · report December 15, 1992
Report
Approved by Office Director
FAA report
19900727028889A
Case key
41250

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

Pilot's improper planning/decision, and his misjudgement of the aircraft's climb capability in conditions of high density altitude and unanticipated atmospheric conditions. The high density altitude and rising terrain were related factors.

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 collision with terrain/waterClimb - to cruise
Planning/decision - improperPilot in commandCause
Weather condition - high density altitudeFactor
Terrain condition - risingFactor
Climb - misjudgedPilot in commandCause
Overconfidence in aircraft's abilityPilot in commandCause

Analysis

The pilot of the lake amphibian took off and turned toward rising terrain, where he anticipated finding slope lift, due to the prevailing winds. He stated that he encountered sink instead, and he had unsufficient terrain clearance to make a course reversal. Subsequently, the aircraft collided with terrain. Density altitude at the time of the accident was approximately 9070 feet.

Aircraft

Registration
N14004
Reported as
Lake LA-250
Category
Airplane
Serial number
008
Engine
Lycoming IO-540, 250 horsepower, reciprocating
Damage
Substantial damage
Flight
Positioning · Part 91
Registered owner
Lake Aircraft
Destination
S87 · Weiser, ID
Flight plan
VFR
Airport
RWL · Rawlins Muni, runway 22, 7,008 × 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
62
Certificates
Flight instructor, Airline transport
Airplane ratings
Single-engine land, Single-engine sea, Multi-engine land
Instrument ratings
Airplane
Medical
Class 1, Valid Medical--w/ waivers/lim
Flight hours
12,300 total · 1,100 in this make and model · 10,137 as pilot in command · 60 in the last 90 days · 16 in the last 30 days · 8 in the last 24 hours

Weather

Conditions
Visual (VMC) · Day
Wind
240° at 18 knots
Visibility
60 statute miles
Lowest ceiling
None
Temperature
72 °F, dew point -0 °F
Altimeter
30.00 inHg
Observed at
RWL, 3 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.