ANC08CA020

NTSB accident investigation · Cessna 170B · Nikolai, AK · November 18, 2007

Accident · No injuriesData collectionFinal report
Date
November 18, 2007, 10:45 local (14:45 UTC)
Place
Nikolai, AK
Injuries
1 uninjured
Damage
Substantial damage
Phase of flight
Enroute
Aircraft
N170BPCessna 170B
Weather
Visual (VMC) · Day
Status
Completed · report February 28, 2008
Report
Approved by Office Director
NTSB office
Alaska Regional Office
Parties
Anchorage FSDO-03
FAA report
20071118828429A
Case key
67128

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 continued flight into adverse weather (icing conditions), which resulted in a loss of engine power during a go-around. Factors contributing to the accident were icing conditions, and carburetor/induction icing.

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 encounter with weatherCruise - normal
Flight into adverse weather - continuedPilot in commandCause
Weather condition - icing conditionsFactor
Loss of engine power(total) - nonmechanicalGo-around (vfr)
Weather condition - carburetor icing conditionsFactor
Ram/induction air - iceFactor
In flight collision with objectEmergency descent/landing
Object - tree(s)

Analysis

The commercial certificated pilot was conducting a solo cross-country flight in a tailwheel-equipped airplane under Title 14, CFR Part 91, when the accident occurred. He reported that he received a special VFR clearance at the departure airport, and as soon as he cleared class E airspace, the airplane started to accumulate rime ice on the wings' leading edges and windshield. He reported that three-quarters of the way to his destination the windshield was suddenly covered with rime ice, and that his destination was the closest airport. At the destination airport, he said the visibility was one-half to one mile in fog and freezing drizzle. On short final he reported that visibility was deteriorating, and he elected to go-around. He said the throttle did not respond, the engine lost power, and the airplane descended into trees. The pilot attributed the engine losing power to a combination of carburetor and induction icing. The pilot reported that there were no known mechanical problems with the airplane prior to the accident. He said during the accident the airplane received damage to the right wing and lift-strut, right aileron, and right elevator. Due to the remote location, the airplane was not examined by the National Transportation Safety Board.

Factual narrative

The commercial certificated pilot was conducting a solo cross-country flight in a tailwheel-equipped airplane under Title 14, CFR Part 91, when the accident occurred. He reported that he received a special VFR clearance at the departure airport, and as soon as he cleared class E airspace, the airplane started to accumulate rime ice on the wings' leading edges and windshield. He reported that three-quarters of the way to his destination the windshield was suddenly covered with rime ice, and that his destination was the closest airport. At the destination airport, he said the visibility was one-half to one mile in fog and freezing drizzle. On short final he reported that visibility was deteriorating, and he elected to go-around. He said the throttle did not respond, the engine quit, and the airplane descended into trees. The pilot attributed the engine quitting to a combination of carburetor and induction icing. The pilot reported that there were no known mechanical problems with the airplane prior to the accident. He said during the accident the airplane received damage to the right wing and lift-strut, right aileron, and right elevator. Due to the remote location, the airplane was not examined by the National Transportation Safety Board.

Aircraft

Registration
N170BP
Reported as
Cessna 170B
Category
Airplane
Serial number
26299
Airframe hours
3,901
Engine
Continental C-145, 145 horsepower, reciprocating
Damage
Substantial damage
Flight
Personal · Part 91
Operator
Richard Anselment
Registered owner
Barney A. Anselment
Airworthiness certificate
Standard, Normal
Last inspection
Annual · January 1, 2007
Departed
PAMC · Mcgrath, AK
Destination
PAFS · Nikolai, AK
Flight plan
VFR

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
57
Injuries
None
Certificates
Flight instructor, Commercial
Airplane ratings
Single-engine land, Multi-engine land
Instrument ratings
Airplane
Medical
Class 3, With waivers/limitations
Last flight review
August 1, 2002
Seat
Left
Flight hours
1,605 total · 302 in this make and model · 1,430 as pilot in command · 55 in the last 90 days · 15 in the last 30 days · 2 in the last 24 hours

Weather

Conditions
Visual (VMC) · Day
Wind
0 knots
Visibility
6 statute miles
Lowest ceiling
563 ft overcast
Temperature
-6 °F, dew point -13 °F
Altimeter
29.98 inHg

FAA reports on this event · 1

The FAA’s own accident and incident reports, matched to the aircraft by N-number and date.