Aircraft Accident/Incident Report

Chinook, Montana 59523
Friday, June 7, 1985 14:35 MDT

NTSB Narrative Summary Released at Completion of Accident

ABOUT 10 MIN AFTER TAKEOFF, THE ACFT WAS DAMAGED DURING A FORCED LANDING AFTER THE ENG BEGAN SPUTTERING & THEN LOST POWER. THE PLT REPORTED THAT HE MADE A NORMAL TAKEOFF WITH THE COWL FLAPS OPEN & THE MIXTURE RICH. AFTER CLIMBING ABOUT 1100 FT (TO 3500 FT MSL), HE CLOSED THE COWL FLAPS & LEANED THE MIXTURE SLIGHTLY. ABOUT 2 TO 3 MIN LATER, THE ENG BEGAN SPUTTERING. THE PLT OBSERVED THE OIL TEMP RISING. HE SAID HE OPENED THE COWL FLAPS, TURNED ON THE CARB HEAT, CHANGED THE FUEL SEL & CHECKED THE MAGNETOS. THE ENG LOST ALL POWER & THE PLT ATTEMPTED TO LAND ON A ROAD. HOWEVER, HE MANEUVERED TO AVOID POWER LINES THEN ELECTED TO LAND IN A FIELD. DURING THE APCH TO LAND, THE ACFT HIT A FENCE & WAS DAMAGED. A LACK OF FUEL WAS NOTED IN THE FUEL LINE LEADING TO THE CARBURETOR. THE ACFT HAD BEEN REFUELED WITH 37 GAL OF UNLEADED AUTOMOTIVE FUEL. THE AIR TEMP WAS REPORTED AS 85 DEG. NO PRE-ACCIDENT PROBLEM WAS FOUND THAT WOULD HAVE CAUSED A LOSS OF POWER, VAPOR LOCK OR OTHER ENG/FUEL SYS PROBLEM. THE WOBBLE PUMP WAS NOT USED WHILE ATTEMPTING TO RESTORE PWR.

NTSB Probable Cause Narrative

Not Yet Reported

Event Information

Type of Event Accident
Event Date 6/7/1985
Event Day of the Week Friday
Time of Event 1435
Event Time Zone Mountain Daylight Time
Event City CHINOOK
Event State MONTANA
Event Country --
Zipcode of the event site 59523
Event Date Year 1985
Event Date Month 6
MidAir Collision Indicator No
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 airport Off Airport/Airstrip
Distance from airport in statute miles 0
Degrees magnetic from airport 0
Airport Elevation --
Weather Briefing Completeness Unknown
Investigator's weather source Pilot
Time of the weather observation 0
Direction of event from weather observation facility (degrees) 0
Weather Observation Facility ID
Elevation of weather observation facility 0
Distance of event from weather observation facility (units?) 0
Time Zone of the weather observation
Lighting Conditions Day
Lowest Ceiling Height 0
Lowest Non-Ceiling Height 0
Sky/Lowest/Cloud Conditions Clear
Sky Condition for Lowest Ceiling None
Visibility Runway Visual Range (Feet) 0
Visibility Runway Visual Value (Statute Miles) 0
Visibility (Statute Miles) 30
Air Temperature at event time (in degrees celsius) 29
Dew Point at event time (in degress fahrenheit) --
Wind Direction (degrees magnetic) 270
Variable Wind Indicator Unknown
Wind Speed (knots) 10
Wind Velocity Indicator Unknown
Wind Gust Indicator Not Gusting
Wind Gust (knots) 0
Altimeter Setting at event time (in. Hg) --
Density Altitude (feet) 3500
Intensity of Precipitation Unknown
METAR weather report --
Event Highest Injury None
On Ground, Fatal Injuries 0
On Ground, Minor Injuries 0
On Ground, Serious Injuries 0
Injury Total Fatal --
Injury Total Minor --
Injury Total None 4
Injury Total Serious --
Injury Total All --
Investigating Agency NTSB
NTSB Docket Number (internal use) 409
NTSB Notification Source --
NTSB Notification Date Jun 7 1985 12:00AM
NTSB Notification Time 1700
Fiche Number and/or location -used to find docket information 27691
Date of most recent change to record Jan 2 2001 9:15AM
User who most recently changed record dbo
Basic weather conditions Visual Meteorological Cond
FAA District Office --

Aircraft Involved

Aircraft #1

Aircraft Registration Number N5099C
NTSB Number DEN85LA151
Missing Aircraft Indicator N
Federal Aviation Reg. Part Part 91: General Aviation
Type of Flight Plan filed None
Flight plan Was Activated? --
Damage Substantial
Aircraft Fire None
Aircraft Explosion None
Aircraft Manufacturer's Full Name BEECH
Aircraft Model B35
Aircraft Series Identifier B35
Aircraft Serial Number D-2361
Certified Max Gross Weight 2650
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 4
Number of Engines 1
Fixed gear or retractable gear Retractable
Aircraft, Type of Last Inspection 100 Hour
Date of Last Inspection Dec 3 1984 12:00AM
Airframe hours since last inspection 37
Airframe Hours 5326
ELT Installed Yes
ELT Activated No
ELT Aided Location of Event Site Unknown
ELT Type --
Aircraft Owner Name MARTIN WILLIAMSON
Aircraft Owner Street Address BOX 542
Aircraft Owner City CHINOOK
Aircraft Owner State MT
Aircraft Owner Country
Aircraft Owner Zipcode
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 certificate None
Other Operator of large aircraft? No
Certified for Part 133 or 137 Operation Unknown
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
Departure City CHINOOK
Departure State MT
Departure Country
Departure Time 1425
Departure Time Zone MDT
Destination Same as Local Flt --
Destination Airport Code
Destination City SPEARFISH
Destination State SD
Destination Country
Specific Phase of Flight Landing
Report sent to ICAO? --
Evacuation occurred --
Date of most recent change to record Jan 2 2001 10:36AM
User who most recently changed record dbo
Since inspection or accident --
Event Location Runway Number and Location 0
Runway Length --
Runway Width --
Sight Seeing flight No
Air Medical Flight No
Medical Flight --