DEN03LA146

NTSB accident investigation · Cessna 150F · Laramie, WY · August 21, 2003

Accident · No injuriesLimited investigationFinal report
Date
August 21, 2003, 11:10 local (17:10 UTC)
Place
Laramie, WY
Injuries
1 uninjured
Damage
Substantial damage
Phase of flight
Enroute
Aircraft
N8065FCessna 150F
Weather
Visual (VMC) · Day
Status
Completed · report March 2, 2004
Report
Approved by Office Director
Parties
FAA Flight Standards District Office
FAA report
20030821020339A
Case key
57746

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

A partial loss of engine power for undetermined reasons. Contributing factors were the high density altitude, trees, mountainous terrain, and unsuitable terrain on which to make a forced landing.

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 engine power(partial) - nonmechanicalCruise - normal
Reason for occurrence undeterminedCause
Weather condition - high density altitudeFactor
Forced landingDescent - emergency
In flight collision with objectEmergency landing
Object - tree(s)Factor
Terrain condition - mountainous/hillyFactor
Terrain condition - none suitableFactor

Analysis

According to the pilot, the airplane was in cruise flight at 10,500 feet when the engine began to run "rough." The power dropped below 2,000 rpm, and the pilot's effort was unsuccessful in restoring power. The pilot made a forced landing in mountainous terrain. The airplane struck several trees, substantially damaging both wings. Density altitude was calculated to be 10,312 feet msl. The engine was later functionally tested to 2,475 rpm. No anomalies were found.

Factual narrative

On August 21, 2003, approximately 1110 mountain daylight time, a Cessna 150F, N8065F, registered to and operated by the pilot, was substantially damaged when it impacted trees during a forced landing 30 miles west of Laramie, Wyoming. The private pilot, the sole occupant on board, was not injured. Visual meteorological conditions prevailed, and no flight plan had been filed for the cross-country flight being conducted under Title 14 CFR Part 91. The flight originated at Skypark Airport, Bountiful, Utah, approximately 0800.

According to the pilot, he was in cruise flight at 10,500 feet when the engine began running "rough." Power dropped below 2,000 rpm. He tried but was unable to restore full power, and made a forced landing in mountainous terrain. The airplane struck several trees, destroying both wings and bending the main spar.

Density altitude at Laramie was calculated to be 10,312 feet msl.

On September 24, 2003, the engine was functionally tested to 2,475 rpm. The magnetos were tested and functioned normally. No mechanical anomalies were noted.

Aircraft

Registration
N8065F
Reported as
Cessna 150F
Category
Airplane
Serial number
15064165
Airframe hours
5,325
Engine
Continental O-200-A, 100 horsepower, reciprocating
Damage
Substantial damage
Flight
Personal · Part 91
Registered owner
Gordon L. Hyde II
Airworthiness certificate
Standard, Utility
Last inspection
Annual · July 18, 2003 · 29 hours before
Departed
BTF · Bountiful, UT
Destination
LAR · Laramie, WY

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
29
Injuries
None
Certificate
Commercial
Airplane ratings
Single-engine land, Multi-engine land
Instrument ratings
Airplane
Medical
Class 2, Valid Medical--w/ waivers/lim
Last flight review
August 28, 2002
Seat
Left
Flight hours
600 total · 30 in this make and model · 450 as pilot in command · 75 in the last 90 days · 25 in the last 30 days · 4 in the last 24 hours

Weather

Conditions
Visual (VMC) · Day
Wind
170° at 11 knots
Visibility
10 statute miles
Lowest ceiling
None
Temperature
82 °F, dew point 43 °F
Altimeter
30.36 inHg
Observed at
LAR, 32 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.

Other investigations on N8065F · 1

Matched to the same aircraft by N-number and date.