ANC06LA101

NTSB accident investigation · Cessna 172E · Big Lake, AK · July 13, 2006

Accident · No injuriesLimited investigationFinal report
Date
July 13, 2006, 07:30 local (15:30 UTC)
Place
Big Lake, AK
Injuries
1 uninjured
Damage
Substantial damage
Phase of flight
Maneuvering
Aircraft
N5560TCessna 172E
Weather
Visual (VMC) · Day
Status
Completed · report February 26, 2007
Report
Approved by Office Director
NTSB office
Alaska Regional Office
Parties
Anchorage FSDO-03
FAA report
20060713016039A
Case key
64210

From the NTSB’s public API. By law, NTSB reports can’t be used as evidence in lawsuits over the accident.

On this page

Probable cause

The pilot's failure to maintain altitude/clearance from a transmission line while performing a low altitude maneuver, which resulted in an in-flight collision with the transmission line.

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
Altitude/clearance - not maintainedPilot in commandCause
Object - wire,transmission
Low altitude flight/maneuver - performedPilot in commandCause

Analysis

The private pilot was conducting a personal local flight under Title 14, CFR Part 91. While performing a low altitude maneuver, the airplane struck a transmission wire suspended between poles. The pilot was able to continue the flight and land without further incident. The airplane sustained structural damage to the right wing, right lift-strut, and rudder.

Factual narrative

On July 13, 2006, about 0730 Alaska daylight time, a Cessna 172E airplane, N5560T, sustained substantial damage during an in-flight collision with a power line while maneuvering at a low altitude, about 3 miles northwest of Big Lake, Alaska. The airplane was being operated by the pilot as a visual flight rules (VFR) personal local flight under Title 14, CFR Part 91, when the accident occurred. The solo private certificated pilot was not injured. Visual meteorological conditions prevailed, and no flight plan was filed for the local flight. The flight departed Big Lake Airport, Big Lake, about 0700.

During a telephone conversation with the National Transportation Safety Board (NTSB) investigator-in-charge (IIC) on July 26, an FAA air safety inspector said he had been advised of a damaged airplane in a hangar at the Big Lake Airport. He stated that he had been given digital photographs of the accident airplane, which he forwarded to the IIC. The photographs depicted substantial damage to the right wing, which was cut through the leading edge to the spar, the right lift-strut had electrical arc burns, the rudder had been removed for replacement, and the vertical stabilizer leading edge was removed for replacement. The inspector said he had contacted the airplane's owner, who was out of the area for several weeks, by cellular phone. He stated that the owner/pilot told him he was flying his airplane northwest of Big Lake, looking for fish in a river when the airplane struck what he thought was a tree. He told the inspector he returned to the airport and inspected the damage. The inspector said the pilot reported that his mechanic told him that the damage indicated he had struck a power line.

On July 27, a manager for the local power company told the IIC that a power line had been struck by an airplane northwest of Big Lake on the morning of July 13, which caused a power outage.

In a written statement dated July 31, the pilot reported that he was attempting to spot fish in a creek when the airplane struck what he initially thought was a tree. He wrote that he returned to the airport and noted the damage to the right wing, lift-strut, and rudder. He indicated that a mechanic who examined the airplane, told him he must have struck a power line.

Aircraft

Registration
N5560T
Reported as
Cessna 172E
Category
Airplane
Serial number
17251460
Engine
Continental O-300-D, 145 horsepower, reciprocating
Damage
Substantial damage
Flight
Personal · Part 91
Operator
Christopher Cyphers
Registered owner
N5560t LLC
Airworthiness certificate
Standard, Normal
Departed
BGO · Big Lake, AK

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
42
Injuries
None
Certificate
Private
Airplane ratings
Single-engine land
Medical
Class 1, With waivers/limitations
Last flight review
December 1, 2005
Seat
Left
Flight hours
1,500 total · 1,300 in this make and model · 1,450 as pilot in command · 45 in the last 90 days · 15 in the last 30 days · 1 in the last 24 hours

Weather

Conditions
Visual (VMC) · Day
Wind
Calm
Visibility
10 statute miles
Lowest ceiling
None
Temperature
55 °F

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 N5560T · 1

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