ANC93LA162

NTSB accident investigation · Cessna 172 · Knik Glacier, AK · August 22, 1993

Accident · No injuriesLimited investigationFinal report
Date
August 21, 1993, 19:30 local (Aug 22, 1993, 03:30 UTC)
Place
Knik Glacier, AK
Injuries
1 uninjured
Damage
Substantial damage
Phase of flight
Landing
Aircraft
N3817SCessna 172
Weather
Visual (VMC) · Day
Status
Completed · report August 18, 1994
Report
Approved by Office Director
NTSB office
Alaska Regional Office
FAA report
19930821036469A
Case key
2417

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 improper inflight planning/decision, and his failure to attain the proper touchdown point. Factors were the rain and the rough/uneven terrain.

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.

Nose gear collapsedLanding - flare/touchdown
Weather condition - rainFactor
In-flight planning/decision - improperPilot in commandCause
Proper touchdown point - not attainedPilot in commandCause
Terrain condition - rough/unevenFactor
Landing gear,nose gear - overload

Analysis

The pilot said he was landing at a narrow and rough remote hunting site, and his forward visibility was limited by heavy rain. He mistakenly touched down about 10 ft to the left side of the landing area onto rough terrain. The nose gear collapsed and the left wing hit the ground.

Factual narrative

On August 21, 1993, at 1930 Alaska daylight time, a wheel equipped Cessna 172 airplane, N3817S, experienced a collapsed nose landing gear while landing at a remote strip adjacent to the Knik Glacier, approximately 10 miles east of Palmer, Alaska. The private pilot, the sole occupant, was not injured, and the airplane was substantially damaged. The personal flight, operating under 14 CFR Part 91, departed Palmer at 1900. Visual meteorological conditions existed, and no flight plan was filed.

During a telephone interview with the pilot shortly after the accident, he stated the following in part: "The purpose of the flight was to hunt moose. The strip was narrow and rough. It was raining heavy and my forward visibility was bad. I mistakenly touched down about 10 feet to the left side of the landing area. The nose gear collapsed and the left wing hit the ground."

While the accident was reported by the pilot on August 22, 1993, the amount of damage was not determined until an aircraft mechanic, Mr. Ray Block, of Palmer, recovered the airplane on August 31, 1993. Mr. Block stated that the rear spar in the left wing was damaged and would have to be replaced.

Aircraft

Registration
N3817S
Reported as
Cessna 172
Category
Airplane
Serial number
17251017
Engine
Continental O-300-D, 145 horsepower, reciprocating
Damage
Substantial damage
Flight
Personal · Part 91
Operator
Cochran, James A.
Registered owner
Cochran, James A.
Airworthiness certificate
Standard, Normal
Last inspection
Annual · May 28, 1993 · 18 hours before
Departed
AK01 · Palmer, 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
52
Certificate
Private
Airplane ratings
Single-engine land
Medical
Class 3, Expired
Seat
Left
Flight hours
776 total · 776 in this make and model · 776 as pilot in command · 18 in the last 30 days · 1 in the last 24 hours

Weather

Conditions
Visual (VMC) · Day
Wind
270° at 5 knots
Visibility
10 statute miles
Lowest ceiling
3,000 ft overcast
Temperature
61 °F

FAA reports on this event · 1

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