ANC01LA044

NTSB accident investigation · Piper PA-12 · Cooper Landing, AK · March 29, 2001

Accident · Serious injuriesLimited investigationFinal report
Date
March 29, 2001, 14:00 local (18:00 UTC)
Place
Cooper Landing, AK
Injuries
1 serious
Damage
Substantial damage
Phase of flight
Enroute
Aircraft
N4028HPiper PA-12
Weather
Instrument (IMC) · Day
Status
Completed · report February 20, 2002
Report
Approved by Office Director
NTSB office
Alaska Regional Office
Parties
Federal Aviation Administration
FAA report
20010329039769A
Case key
52005

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 VFR flight into instrument metrological conditions during cruise flight. Factors associated in the accident were low ceilings, whiteout conditions, and snow-covered 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.

In flight encounter with weatherCruise
Vfr flight into imc - continuedPilot in commandCause
Terrain condition - snow coveredFactor
Weather condition - low ceilingFactor
Weather condition - whiteoutFactor
In flight collision with terrain/waterManeuvering - turn to reverse direction
Terrain condition - snow covered

Analysis

The certificated commercial pilot was flying the first airplane in a flight of two airplanes over an area of snow-covered terrain. He said that as the flight progressed, weather conditions worsened as they entered an area of mountainous terrain. He said that as both airplanes progressed along the intended route, weather conditions were about 300 feet overcast, and visibility about 3 miles. The accident pilot said that as he flew over a large and featureless snow-covered lake, he was maintaining visual reference to the ground by using terrain features on the lake shoreline on the right side of the airplane. He reported that as weather conditions worsened, he radioed the second airplane that he was turning around. He began a left turn, and during the turn, he said he lost all visual reference to the frozen, snow-covered lake. He added that he was able to level the wings just before colliding with the surface of the snow-covered lake.

Factual narrative

On March 29, 2001, about 1400 Alaska standard time, a tundra tire equipped Piper PA-12 airplane, N4028H, sustained substantial damage during a collision with a snow-covered frozen lake, about 8 miles south-southwest of Cooper Landing, Alaska. The airplane was being operated as a visual flight rules (VFR) cross-country personal flight when the accident occurred. The solo certificated commercial pilot received serious injuries. Visual meteorological conditions prevailed in the area of the accident. The flight originated at the Cordova Airport, Cordova, Alaska, about 1230.

During a telephone conversation with the National Transportation Safety Board investigator-in-charge on April 2, the pilot reported that he was flying the first airplane in a flight of two airplanes, en route to Homer, Alaska. He said that as the flight progressed, weather conditions worsened soon after they passed over Seward, Alaska, and entered an area of mountainous terrain. He said that as both airplanes flew northwest, along the Resurrection River, weather conditions were about 300 feet overcast, and visibility about 3 miles. The accident pilot said that as he flew over a large and featureless snow-covered lake, he was maintaining visual reference to the ground by using terrain features on the lake shoreline on the right side of the airplane. He reported that as weather conditions worsened, he radioed the second airplane that he was turning around. He began a left turn, and during the turn, he said he lost all visual reference to the frozen, snow-covered lake. He added that he was able to level the wings just before colliding with the surface of the snow-covered lake. The airplane sustained substantial damage to the wings, fuselage, and landing gear. The pilot sustained a broken left leg.

In the pilot's written report to the NTSB dated July 5, 2001, the pilot reported that as he made the left turn, he attempted to slow the airplane, and land on the frozen lake. He said that the airplane landed hard on the ice, which destroyed the landing gear, and left wing.

Aircraft

Registration
N4028H
Reported as
Piper PA-12
Category
Airplane
Serial number
12-3456
Airframe hours
4,000
Engine
Lycoming O-320-A1A, 150 horsepower, reciprocating
Damage
Substantial damage
Flight
Personal · Part 91
Registered owner
Brad C. Heil
Airworthiness certificate
Standard, Normal
Last inspection
Annual · March 2, 2001 · 50 hours before
Departed
CDV · Cordova, AK
Destination
HOM · Homer, 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
40
Injuries
Serious
Certificate
Commercial
Airplane ratings
Single-engine land, Multi-engine land
Medical
Class 2, Valid Medical--w/ waivers/lim
Last flight review
March 23, 1999
Seat
Front
Flight hours
10,000 total · 5,000 in this make and model · 10,000 as pilot in command

Weather

Conditions
Instrument (IMC) · Day
Visibility
3 statute miles
Lowest ceiling
300 ft overcast

FAA reports on this event · 1

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