WPR11CA397

NTSB accident investigation · Cessna 170B · Jefferson, OR · August 19, 2011

Accident · Minor injuriesData collectionFinal report
Date
August 18, 2011, 19:45 local (Aug 19, 2011, 02:45 UTC)
Place
Jefferson, OR
Injuries
2 minor
Damage
Substantial damage
Phase of flight
Approach
Aircraft
N2789DCessna 170B
Defining event
Approach-VFR pattern final: Controlled flight into terr/obj (CFIT)
Weather
Visual (VMC) · Day
Status
Completed · report November 3, 2011
Report
Approved by Office Director
NTSB office
Western Pacific Region
Parties
Federal Aviation Adminstration FSDO
FAA report
20110818018719A
Case key
81567

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 from power transmission lines during the landing approach into the sun.

Findings · 3

NTSB’s coded findings. Those marked are part of the probable cause; the rest are factors or other findings. Under each, the cases with the same finding.

Object/animal/substance: wireEnvironmental issues › Physical environment · Response/compensationCessna 170B: 1 caseAll aircraft: 588 casesProbable cause
Light condition: glareEnvironmental issues › Conditions/weather/phenomena · Effect on personnelCessna 170B: 1 caseAll aircraft: 109 cases

Sequence of events

The events NTSB coded, in order, by phase of flight. The defining event is the one that best describes the accident. Under each, the cases with the same event anywhere in their sequence.

Analysis

The pilot was landing on a grass field toward the west just prior to sunset. During the final approach, about 30 feet above ground level, he became aware of power transmission lines directly ahead. The airplane struck the lines and descended to the ground. The airplane sustained substantial damage during the accident sequence, and the pilot and passenger sustained minor injuries. According to the United States Naval Observatory Astronomical Applications Department, the altitude and azimuth of the sun at 1940 in the closest town were 5 degrees and 283.4 degrees, respectively. The pilot reported no preimpact mechanical malfunctions or failures with the airframe or engine that would have precluded normal operation. He stated that this was the first time he had flown to this location, and that he did not overfly the field or perform a thorough review of the area prior to attempting the landing.

Factual narrative

The private pilot was attempting to perform a landing into a grass field just prior to sunset. The landing approach was performed to the west, towards the sun. During the final approach, about 30 feet above ground level, he became aware of power transmission lines directly ahead. The airplane struck the lines and descended to the ground. The airplane sustained substantial damage during the accident sequence, and the pilot and passenger sustained minor injuries. According to the United States Naval Observatory Astronomical Applications Department, the altitude and azimuth of the sun at 1940 in the closest town were 5 degrees and 283.4 degrees, respectively. The pilot stated that this was the first time he had landed at this location, but he had both overflown, and walked along the field on multiple occasions prior. The pilot reported no preimpact mechanical malfunctions or failures with the airframe or engine that would have precluded normal operation.

Aircraft

Registration
N2789D
Reported as
Cessna 170B
Category
Airplane
Serial number
25331
Airframe hours
7,553
Engine
Cont Motor C145 SERIES, 145 horsepower, reciprocating
Damage
Substantial damage
Flight
Personal · Part 91
Airworthiness certificate
Standard, Normal
Last inspection
Annual · June 11, 2011 · 12 hours before
Departed
S12 · Albany, OR
Destination
PVT · Jefferson, OR
Flight plan
Unknown
Airport
PVT · Jefferson

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
41
Injuries
Minor
Certificate
Private
Airplane ratings
Single-engine land
Medical
Class 3, With waivers/limitations
Last flight review
March 5, 2010
Seat
Left
Flight hours
253 total · 190 in this make and model · 210 as pilot in command · 53 in the last 90 days · 6 in the last 30 days · 1 in the last 24 hours

Weather

Conditions
Visual (VMC) · Day
Wind
50° at 8 knots
Visibility
10 statute miles
Lowest ceiling
None
Temperature
79 °F, dew point 50 °F
Altimeter
30.04 inHg
Observed at
KSLE, 12 nm away

Docket · 2

The files NTSB released with the investigation on October 3, 2011, on NTSB’s docket system: statements, records, photos and specialists’ reports. 1.5 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.