Aircraft Accident/Incident Report

Cooper Landing, Alaska 99752
Thursday, March 29, 2001 14:00 AST

NTSB Narrative Summary Released at Completion of Accident

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.

NTSB Probable Cause Narrative

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.

Event Information

Type of Event Accident
Event Date 3/29/2001
Event Day of the Week Thursday
Time of Event 1400
Event Time Zone Atlantic Standard Time
Event City Cooper Landing
Event State ALASKA
Event Country --
Zipcode of the event site 99752
Event Date Year 2001
Event Date Month 3
MidAir Collision Indicator No
On Ground Collision occurred ? No
Event Location Latitude 602800N
Event Location Longitude 1494313W
Event Location Airport --
Event Location Nearest Airport ID --
Indicates whether the acc/inc occurred off or on an airport Off Airport/Airstrip
Distance from airport in statute miles --
Degrees magnetic from airport --
Airport Elevation --
Weather Briefing Completeness Full
Investigator's weather source Pilot
Time of the weather observation
Direction of event from weather observation facility (degrees) --
Weather Observation Facility ID --
Elevation of weather observation facility --
Distance of event from weather observation facility (units?) --
Time Zone of the weather observation --
Lighting Conditions Day
Lowest Ceiling Height 300
Lowest Non-Ceiling Height --
Sky/Lowest/Cloud Conditions --
Sky Condition for Lowest Ceiling Overcast
Visibility Runway Visual Range (Feet) --
Visibility Runway Visual Value (Statute Miles) --
Visibility (Statute Miles) 3
Air Temperature at event time (in degrees celsius) --
Dew Point at event time (in degress fahrenheit) --
Wind Direction (degrees magnetic) --
Variable Wind Indicator Variable
Wind Speed (knots) --
Wind Velocity Indicator --
Wind Gust Indicator Unknown
Wind Gust (knots) --
Altimeter Setting at event time (in. Hg) --
Density Altitude (feet) --
Intensity of Precipitation Light
METAR weather report --
Event Highest Injury Serious
On Ground, Fatal Injuries --
On Ground, Minor Injuries --
On Ground, Serious Injuries --
Injury Total Fatal --
Injury Total Minor --
Injury Total None --
Injury Total Serious 1
Injury Total All 1
Investigating Agency NTSB
NTSB Docket Number (internal use) 11392
NTSB Notification Source ANC FAA, ROC
NTSB Notification Date Mar 31 2001 12:00AM
NTSB Notification Time 1424
Fiche Number and/or location -used to find docket information IMAGE
Date of most recent change to record Feb 20 2002 1:46PM
User who most recently changed record NTSB\MONR
Basic weather conditions Instrument Meteorological Cond
FAA District Office Anchorage FSDO

Aircraft Involved

Aircraft #1

Aircraft Registration Number N4028H
NTSB Number ANC01LA044
Missing Aircraft Indicator --
Federal Aviation Reg. Part Part 91: General Aviation
Type of Flight Plan filed None
Flight plan Was Activated? No
Damage Substantial
Aircraft Fire None
Aircraft Explosion None
Aircraft Manufacturer's Full Name Piper
Aircraft Model PA-12
Aircraft Series Identifier --
Aircraft Serial Number 12-3456
Certified Max Gross Weight 1750
Aircraft Category Airplane
Aircraft Registration Class U.S. Registered/U.S. Soil
Aircraft is a homebuilt? No
Flight Crew Seats --
Cabin Crew Seats --
Passenger Seats --
Total number of seats on the aircraft 3
Number of Engines 1
Fixed gear or retractable gear Fixed
Aircraft, Type of Last Inspection Annual
Date of Last Inspection Mar 2 2001 12:00AM
Airframe hours since last inspection 50
Airframe Hours 4000
ELT Installed Yes
ELT Activated Yes
ELT Aided Location of Event Site No
ELT Type --
Aircraft Owner Name Brad C. Heil
Aircraft Owner Street Address P.O.Box 1562
Aircraft Owner City Homer
Aircraft Owner State AK
Aircraft Owner Country USA
Aircraft Owner Zipcode 99603
Operator is an individual? No
Operator Name --
Operator Same as Owner? Yes
Operator Is Doing Business As --
Operator Address Same as Owner? Yes
Operator Street Address --
Operator City --
Operator State --
Operator Country --
Operator Zip code --
Operator Code --
Owner has at least one certificate None
Other Operator of large aircraft? --
Certified for Part 133 or 137 Operation --
Operator Certificate Number --
Indicates whether an air carrier operation was scheduled or not --
Indicates Domestic or International Flight --
Operator carrying Pax/Cargo/Mail --
Type of Flying (Per_Bus / Primary) Personal
Second Pilot on Board No
Departure Point Same as Event No
Departure Airport Code CDV
Departure City Cordova
Departure State AK
Departure Country USA
Departure Time 1200
Departure Time Zone AST
Destination Same as Local Flt --
Destination Airport Code HOM
Destination City Homer
Destination State AK
Destination Country USA
Specific Phase of Flight Cruise
Report sent to ICAO? No
Evacuation occurred No
Date of most recent change to record Jan 29 2002 5:31PM
User who most recently changed record STAM
Since inspection or accident Time of Accident
Event Location Runway Number and Location --
Runway Length --
Runway Width --
Sight Seeing flight No
Air Medical Flight No
Medical Flight --