FTW02LA063

NTSB accident investigation · Cessna 172N · Durango, CO · January 9, 2002

Accident · Serious injuriesLimited investigationFinal report
Date
January 9, 2002, 11:30 local (18:30 UTC)
Place
Durango, CO
Injuries
2 serious, 1 uninjured
Damage
Substantial damage
Phase of flight
Maneuvering
Aircraft
N3535ECessna 172N
Weather
Visual (VMC) · Day
Status
Completed · report April 1, 2003
Report
Approved by Office Director
Parties
FAA FSDO
FAA report
20020109000399A
Case key
53998

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 failure to maintain clearance with the trees and mountainous terrain while maneuvering. A contributing factor was the pilot's delay in taking remedial action.

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 objectManeuvering
Terrain condition - rising
Remedial action - delayedPilot in commandFactor
Terrain condition - mountainous/hilly
Altitude/clearance - not maintainedPilot in commandCause
Object - tree(s)
In flight collision with terrain/waterDescent - uncontrolled
Terrain condition - ground

Analysis

The pilot and his two friends were on a local mountain sightseeing flight. While flying over a canyon, the pilot commented to his passengers that "the flight was proceeding exactly as I had hoped and that our airspeed and rate of climb were both exactly where I wanted them to be (80 kias and 500 fpm)." While pointing out the terrain features to his passengers, the pilot noticed the airplane's altitude was lower than the canyon rim, and the climb rate and airspeed began to decrease. After the airplane's descent rate increased, he attempted to turn the airplane around and exit the canyon. While executing a turn to the right, the stall warning horn sounded, and the pilot decided to execute a precautionary landing to a clearing. During the ensuing precautionary landing, the airplane impacted trees and the terrain. The elevation at the accident site was 9,430 feet msl.

Factual narrative

On January 9, 2002, approximately 1130 mountain standard time, a Cessna 172N single-engine airplane, N3535E, sustained substantial damage after it impacted the terrain while maneuvering near Durango, Colorado. The instrument-rated commercial pilot was not injured and the two passengers sustained serious injuries. The airplane was registered to and operated by Sevenbar Aviation Group, doing business as (d.b.a.) Sevenbar Four Corners, of Farmington, New Mexico. Visual meteorological conditions prevailed and a flight plan was not filed for the 14 Code of Federal Regulations Part 91 personal flight. The local flight departed the Four Corners Regional Airport, Farmington, at 1015.

In the Pilot/Operator Aircraft Accident Report (NTSB Form 6120.1/2) and in a telephone interview with an NTSB investigator, the 275-hour pilot reported that he and two friends were on a mountain sightseeing flight. The pilot reported that the airplane entered the Hermosa Drainage canyon area, "a normal okay route," which runs east/west along Purgatory Recreational Area, Purgatory, Colorado. While flying over the canyon, the pilot commented to his passengers that "the flight was proceeding exactly as I had hoped and that our airspeed and rate of climb were both exactly where I wanted them to be (80 kias and 500 fpm)." While pointing out the terrain features to his passengers, he noticed the airplane's altitude was lower than the canyon rim and the climb rate and airspeed began to decrease. After the airplane's descent rate increased, he attempted to turn the airplane around and exit the canyon. While executing a turn to the right, the stall warning horn sounded, and the pilot decided to execute a precautionary landing to a clearing. During the ensuing precautionary landing, the airplane impacted trees and the terrain. The elevation at the accident site was 9,430 feet msl.

The pilot reported that there were no anomalies with the airframe or engine during the accident flight.

Aircraft

Registration
N3535E
Reported as
Cessna 172N
Category
Airplane
Serial number
17271577
Airframe hours
5,444.8
Engine
Lycoming O-320-H2AD, 160 horsepower, reciprocating
Damage
Substantial damage
Flight
Personal · Part 91
Registered owner
Sevenbar Aviation Group
Airworthiness certificate
Standard, Normal
Last inspection
100 hour · November 21, 2001 · 94 hours before
Departed
FMN · Farmington, NM

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
31
Injuries
None
Certificate
Commercial
Airplane ratings
Single-engine land, Multi-engine land
Instrument ratings
Airplane
Medical
Class 1, Valid Medical--w/ waivers/lim
Seat
Left
Flight hours
275 total · 15 in this make and model · 170 as pilot in command · 16 in the last 90 days · 1 in the last 30 days

Weather

Conditions
Visual (VMC) · Day
Visibility
10 statute miles
Lowest ceiling
None
Temperature
39 °F

Docket · 3

The files NTSB released with the investigation on December 3, 2002, on NTSB’s docket system: statements, records, photos and specialists’ reports. 1.4 MB in all.

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 N3535E · 1

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