ANC90FA053

NTSB accident investigation · Cessna 172-K · Anchorage, AK · April 12, 1990

Accident · No injuriesField investigationFinal report
Date
April 12, 1990, 15:47 local (23:47 UTC)
Place
Anchorage, AK
Injuries
1 uninjured
Damage
Substantial damage
Phase of flight
Landing
Aircraft
N46410Cessna 172-K
Weather
Visual (VMC) · Day
Status
Completed · report September 21, 1992
Report
Approved by Office Director
NTSB office
Alaska Regional Office
FAA report
19900412008469A
Case key
5291

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

Pilot-in-command used poor judgement when he elected to take off on rough & uneven frozen lake which resulted in a failed nose ski.

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.

Loss of control - on ground/waterLanding - roll
Terrain condition - icyFactor
Aircraft control - not maintainedPilot in commandCause
Terrain condition - softFactor
Lift-off - improperPilot in commandCause
Nose overLanding - roll

Analysis

The pilot attempted a takeoff to the west on a frozen lake. Ice/snow was crusty and rough at lift off the nose ski failed and began hitting the fuselage. The pilot elected to land straight ahead. Landed high on main wheel skis. As nose strut touched down it went through snow crust & collapsed. A/c stopped on its nose.

Aircraft

Registration
N46410
Reported as
Cessna 172-K
Category
Airplane
Serial number
17257249
Airframe hours
3,158
Engine
Lycoming O-360, 180 horsepower, reciprocating
Damage
Substantial damage
Flight
Personal · Part 91
Registered owner
Frank Pinkerton
Airworthiness certificate
Standard, Normal
Last inspection
Annual · December 19, 1989 · 33 hours before
Airport
WEST · Lake Hood, runway 27, ice

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
58
Certificate
Commercial
Airplane ratings
Single-engine land, Multi-engine land, Single-engine sea
Instrument ratings
Airplane
Medical
Class 2, Valid Medical--w/ waivers/lim
Seat
Left
Flight hours
4,700 total · 900 in this make and model · 4,650 as pilot in command · 20 in the last 90 days · 10 in the last 30 days · 2 in the last 24 hours

Weather

Conditions
Visual (VMC) · Day
Wind
Calm
Visibility
90 statute miles
Lowest ceiling
None
Temperature
52 °F, dew point 27 °F
Altimeter
30.00 inHg
Observed at
ANC, 1 nm away

FAA reports on this event · 1

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