CEN11CA139

NTSB accident investigation · Cessna 305A · Spooner, WI · December 25, 2010

Accident · No injuriesData collectionFinal report
Date
December 25, 2010, 14:00 local (20:00 UTC)
Place
Spooner, WI
Injuries
2 uninjured
Damage
Substantial damage
Phase of flight
Landing
Aircraft
N6897Cessna 305A
Defining event
Landing-landing roll: Collision with terr/obj (non-CFIT)
Weather
Visual (VMC) · Day
Status
Completed · report May 26, 2011
Report
Approved by Office Director
NTSB office
Central Region
Parties
Federal Aviation Administration
FAA report
20101225054239A
Case key
78091

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 selection of unsuitable terrain for landing on a snow-covered lake.

Findings · 2

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.

Runway/land/takeoff/taxi surface: snow/slush/ice covered surfaceEnvironmental issues › Physical environment · Contributed to outcomeCessna 305A: 1 caseAll aircraft: 219 casesProbable cause

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 reported that prior to landing, he performed two low level passes to determine a safe landing area on the frozen lake. He said that during the landing, the left landing gear ski touched down and he heard a bang as the left ski impacted a snow-covered raised ice ridge. He slowed the airplane for the landing rollout and the airplane came to rest upright. A postaccident examination of the airplane revealed that the landing gear box structure was bent and the bulkheads were damaged. The examination did not disclose any evidence of a mechanical malfunction. The pilot reported that he should have landed the airplane in the middle of lake which likely would have had less slush and rough ice.

Factual narrative

The pilot reported that prior to landing, he performed two low level passes to determine a safe landing area on the frozen lake. During the landing, the left landing gear ski touched down and the pilot heard a bang as the left ski impacted a snow covered raised ice ridge. The pilot slowed the airplane for the remaining landing and it came to rest upright. Examination of the airplane revealed that the landing gear box structure was bent and the bulkheads were damaged. No mechanical anomalies were noted with the airplane. The pilot reported that he should have landed the airplane in the middle of lake which likely would have had less slush and rough ice.

Aircraft

Registration
N6897
Reported as
Cessna 305A
Category
Airplane
Serial number
22728
Airframe hours
6,587
Engine
Cont Motor O-470-11, 213 horsepower, reciprocating
Damage
Substantial damage
Flight
Personal · Part 91
Operator
Kronlund Kevin
Registered owner
Kronlund Kevin
Airworthiness certificate
Standard, Normal
Last inspection
Annual · September 2, 2010
Departed
PVT · Spooner, WI
Destination
Spooner, WI

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
53
Injuries
None
Certificate
Private
Airplane ratings
Single-engine land
Medical
Class 3, With waivers/limitations
Last flight review
August 24, 2009
Seat
Front
Flight hours
541 total · 339 in this make and model · 484 as pilot in command · 12 in the last 90 days · 1 in the last 30 days

Weather

Conditions
Visual (VMC) · Day
Wind
Calm
Visibility
6 statute miles
Lowest ceiling
5,000 ft overcast
Temperature
21 °F
Altimeter
29.73 inHg
Observed at
RPD, 32 nm away

Docket · 1

The files NTSB released with the investigation on January 25, 2011, on NTSB’s docket system: statements, records, photos and specialists’ reports. 307 KB 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.