Aircraft Incident/Accident Report


Flathorn Lake, Alaska 99502
Sunday, June 24, 1984 22:30 ADT

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NTSB Narrative Summary Released at Completion of Accident
ACCORDING TO THE PASSENGERS,THE PLT WAS FLYING AT APRX 250 FT WHEN THEY SAW A BEAR. AFTER STARTING A LEFT TURN, THE NOSE OF THE ACFT DROPPED. ONE PASSENGER SAID THE PLT MADE A TIGHT TURN BEFORE THE PLANE LOST ITS LIFT. THE OTHER PASSENGER STATED THAT THE ACFT SPIRALED TO THE GROUND.
NTSB Probable Cause Narrative
Not Yet Reported
Event Information
Type of EventAccident 
Event Date6/24/1984 
Event Day of the WeekSunday 
Time of Event2230 
Event Time ZoneAtlantic Daylight Time 
Event CityFLATHORN LAKE  
Event StateALASKA 
Event Country-- 
Zipcode of the event site99502  
Event Date Year1984 
Event Date Month
MidAir Collision IndicatorNo 
On Ground Collision occurred ?No 
Event Location Latitude  
Event Location Longitude  
Event Location Airport  
Event Location Nearest Airport ID  
Indicates whether the acc/inc occurred off or on an airportOff Airport/Airstrip 
Distance from airport in statute miles
Degrees magnetic from airport
Airport Elevation-- 
Weather Briefing CompletenessUnknown 
Investigator's weather sourcePilot 
Time of the weather observation0  
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 ConditionsDay 
Lowest Ceiling Height
Lowest Non-Ceiling Height
Sky/Lowest/Cloud ConditionsClear 
Sky Condition for Lowest CeilingNone 
Visibility Runway Visual Range (Feet)
Visibility Runway Visual Value (Statute Miles)
Visibility (Statute Miles) 50 
Air Temperature at event time (in degrees celsius)16 
Dew Point at event time (in degress fahrenheit)-7 
Wind Direction (degrees magnetic)
Variable Wind IndicatorVariable 
Wind Speed (knots)
Wind Velocity Indicator Unknown 
Wind Gust IndicatorUnknown 
Wind Gust (knots)
Altimeter Setting at event time (in. Hg) 29 
Density Altitude (feet)-- 
Intensity of PrecipitationUnknown 
METAR weather report -- 
Event Highest InjurySerious 
On Ground, Fatal Injuries
On Ground, Minor Injuries
On Ground, Serious Injuries
Injury Total Fatal-- 
Injury Total Minor
Injury Total None-- 
Injury Total Serious
Injury Total All
Investigating AgencyNTSB 
NTSB Docket Number (internal use)601 
NTSB Notification Source-- 
NTSB Notification Date-- 
NTSB Notification Time
Fiche Number and/or location -used to find docket information24308 
Date of most recent change to recordJan 2 2001 9:15AM 
User who most recently changed recorddbo  
Basic weather conditionsVisual Meteorological Cond 
FAA District Office-- 
Aircraft Involved
Aircraft #1
Aircraft Registration NumberN4164Z 
NTSB NumberANC84LA100  
Missing Aircraft Indicator
Federal Aviation Reg. PartPart 91: General Aviation 
Type of Flight Plan filedNone 
Flight plan Was Activated?-- 
DamageDestroyed 
Aircraft FireNone 
Aircraft ExplosionNone 
Aircraft Manufacturer's Full NamePIPER  
Aircraft ModelPA-18  
Aircraft Series IdentifierPA-18  
Aircraft Serial Number188345  
Certified Max Gross Weight1750 
Aircraft CategoryAirplane 
Aircraft Registration ClassU.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
Number of Engines
Fixed gear or retractable gearFixed 
Aircraft, Type of Last InspectionAnnual 
Date of Last InspectionAug 5 1983 12:00AM 
Airframe hours since last inspection110 
Airframe Hours1120 
ELT InstalledYes 
ELT ActivatedYes 
ELT Aided Location of Event SiteYes 
ELT Type-- 
Aircraft Owner NameVERN W. MAHONEY  
Aircraft Owner Street AddressP.O. BOX 6025  
Aircraft Owner CityANCHORAGE  
Aircraft Owner StateAK 
Aircraft Owner Country  
Aircraft Owner Zipcode99502  
Operator is an individual?-- 
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 certificateNone 
Other Operator of large aircraft?No 
Certified for Part 133 or 137 OperationUnknown 
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 BoardNo 
Departure Point Same as EventNo 
Departure Airport CodeSKW  
Departure CitySKWENTNA  
Departure StateAK 
Departure Country  
Departure Time950 
Departure Time ZoneADT 
Destination Same as Local Flt-- 
Destination Airport Code  
Destination CityFLATHORN LAKE  
Destination StateAK 
Destination Country  
Specific Phase of FlightDescent 
Report sent to ICAO?-- 
Evacuation occurred-- 
Date of most recent change to recordJan 2 2001 10:36AM 
User who most recently changed recorddbo  
Since inspection or accident-- 
Event Location Runway Number and Location0  
Runway Length-- 
Runway Width-- 
Sight Seeing flightNo 
Air Medical FlightNo 
Medical Flight--