Aircraft Accident/Incident Report

Skwentna, Alaska 99667
Saturday, May 3, 2003 12:00 AKD

NTSB Narrative Summary Released at Completion of Accident

The pilot reported he was operating the airplane about 100 feet above the ground when he initiated a downwind turn. He said that during the turn, the airplane encountered a downdraft, which pushed the airplane closer to the ground. He immediately applied full power, but the engine did not appear to produce full power, and the airplane continued to descend. He said due to the airplane's low altitude, he was unable to select a better landing area than a nearby frozen river. The airplane landed hard on the ice, damaging the wings, fuselage, and landing gear. The pilot indicated that he believed that the engine did not produce full power due to carburetor ice, which had accumulated since he had been operating the engine at a reduced power setting without carburetor heat.

NTSB Probable Cause Narrative

The pilot's failure to use carburetor heat, which resulted in the accumulation of carburetor ice, a partial loss of engine power, and a subsequent forced landing. Factors contributing to the accident are a downdraft, the pilot operating the airplane at a low altitude, the presence of carburetor icing conditions, and the lack of suitable terrain for a forced landing.

Event Information

Type of Event Accident
Event Date 5/3/2003
Event Day of the Week Saturday
Time of Event 1200
Event Time Zone --
Event City Skwentna
Event State ALASKA
Event Country --
Zipcode of the event site 99667
Event Date Year 2003
Event Date Month 5
MidAir Collision Indicator No
On Ground Collision occurred ? No
Event Location Latitude 623000N
Event Location Longitude 1532000W
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 Unknown
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 --
Lowest Non-Ceiling Height --
Sky/Lowest/Cloud Conditions Clear
Sky Condition for Lowest Ceiling None
Visibility Runway Visual Range (Feet) --
Visibility Runway Visual Value (Statute Miles) --
Visibility (Statute Miles) 20
Air Temperature at event time (in degrees celsius) 4
Dew Point at event time (in degress fahrenheit) --
Wind Direction (degrees magnetic) 360
Variable Wind Indicator Wind direction could be determined
Wind Speed (knots) 15
Wind Velocity Indicator --
Wind Gust Indicator Gusting
Wind Gust (knots) 20
Altimeter Setting at event time (in. Hg) --
Density Altitude (feet) --
Intensity of Precipitation --
METAR weather report --
Event Highest Injury None
On Ground, Fatal Injuries --
On Ground, Minor Injuries --
On Ground, Serious Injuries --
Injury Total Fatal --
Injury Total Minor --
Injury Total None 2
Injury Total Serious --
Injury Total All --
Investigating Agency NTSB
NTSB Docket Number (internal use) 14133
NTSB Notification Source Pilot
NTSB Notification Date May 7 2003 12:00AM
NTSB Notification Time 1300
Fiche Number and/or location -used to find docket information DMS
Date of most recent change to record Nov 25 2003 11:36AM
User who most recently changed record NTSB\MONR
Basic weather conditions Visual Meteorological Cond
FAA District Office Anchorage

Aircraft Involved

Aircraft #1

Aircraft Registration Number N8240P
NTSB Number ANC03LA048
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-18-160
Aircraft Series Identifier --
Aircraft Serial Number 18-8045
Certified Max Gross Weight 2000
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 2
Number of Engines 1
Fixed gear or retractable gear Fixed
Aircraft, Type of Last Inspection Annual
Date of Last Inspection Feb 17 2003 12:00AM
Airframe hours since last inspection 18.5
Airframe Hours 2666.5
ELT Installed Yes
ELT Activated Yes
ELT Aided Location of Event Site No
ELT Type --
Aircraft Owner Name Keith Forsgren
Aircraft Owner Street Address --
Aircraft Owner City Wasilla
Aircraft Owner State AK
Aircraft Owner Country USA
Aircraft Owner Zipcode 99687
Operator is an individual? No
Operator Name Kyle Forsgren
Operator Same as Owner? No
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 0AK1
Departure City WASILLA
Departure State AK
Departure Country USA
Departure Time 1030
Departure Time Zone ADT
Destination Same as Local Flt crash at destination city
Destination Airport Code --
Destination City Skwentna
Destination State AK
Destination Country USA
Specific Phase of Flight Maneuvering
Report sent to ICAO? No
Evacuation occurred No
Date of most recent change to record Aug 19 2003 12:11PM
User who most recently changed record PETL
Since inspection or accident Last Inspection
Event Location Runway Number and Location --
Runway Length --
Runway Width --
Sight Seeing flight No
Air Medical Flight No
Medical Flight --