Aircraft Accident/Incident Report

Manokotak, Alaska 99628
Friday, June 6, 1986 13:15 AKD

NTSB Narrative Summary Released at Completion of Accident

DURING CRUISE FLIGHT THE ENGINE BEGAN TO RUN ROUGH. THE PILOT ATTEMPTED SWITCHING FUEL TANKS BUT THE ENGINE CONTINUED TO RUN ROUGH. THE ENGINE CEASED OPERATION AND DID NOT WINDMILL DURING THE EMERGENCY DESCENT. AN EXAMINATION OF THE ENGINE LATER REVEALED THAT THE CRANKSHAFT HAD FRACTURED IN THE VICINITY OF THE NUMBER 2 AND 3 CRANKSHAFT JOURNAL. THE MODE OF FRACTURE WAS NOT DETERMINED. AN OFF ARPT FORCED LNDG WAS ACCOMPLISHED WITHOUT FURTHER INCIDENT.

NTSB Probable Cause Narrative

Not Yet Reported

Event Information

Type of Event Incident
Event Date 6/6/1986
Event Day of the Week Friday
Time of Event 1315
Event Time Zone --
Event City MANOKOTAK
Event State ALASKA
Event Country --
Zipcode of the event site 99628
Event Date Year 1986
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 0
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 12000
Lowest Non-Ceiling Height 2000
Sky/Lowest/Cloud Conditions Scattered
Sky Condition for Lowest Ceiling Broken
Visibility Runway Visual Range (Feet) 0
Visibility Runway Visual Value (Statute Miles) 0
Visibility (Statute Miles) 25
Air Temperature at event time (in degrees celsius) 10
Dew Point at event time (in degress fahrenheit) 1
Wind Direction (degrees magnetic) 80
Variable Wind Indicator Unknown
Wind Speed (knots) 10
Wind Velocity Indicator Unknown
Wind Gust Indicator Unknown
Wind Gust (knots) 21
Altimeter Setting at event time (in. Hg) 29
Density Altitude (feet) 320
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 6
Injury Total Serious --
Injury Total All --
Investigating Agency NTSB
NTSB Docket Number (internal use) 5027
NTSB Notification Source --
NTSB Notification Date Jun 6 1986 12:00AM
NTSB Notification Time 1330
Fiche Number and/or location -used to find docket information 31832
Date of most recent change to record Jan 2 2001 9:14AM
User who most recently changed record dbo
Basic weather conditions Visual Meteorological Cond
FAA District Office --

Aircraft Involved

Aircraft #1

Aircraft Registration Number N1737U
NTSB Number ANC86IA066
Missing Aircraft Indicator N
Federal Aviation Reg. Part Part 135: Air Taxi & Commuter
Type of Flight Plan filed Company VFR
Flight plan Was Activated? --
Damage Minor
Aircraft Fire None
Aircraft Explosion None
Aircraft Manufacturer's Full Name CESSNA
Aircraft Model 207
Aircraft Series Identifier 207
Aircraft Serial Number 20700307
Certified Max Gross Weight 3800
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 6
Number of Engines 1
Fixed gear or retractable gear Fixed
Aircraft, Type of Last Inspection 100 Hour
Date of Last Inspection Jun 3 1986 12:00AM
Airframe hours since last inspection 20
Airframe Hours 3800
ELT Installed Yes
ELT Activated Yes
ELT Aided Location of Event Site No
ELT Type --
Aircraft Owner Name PHILLIP L. BINGMAN
Aircraft Owner Street Address P.O. BOX 180
Aircraft Owner City DILLINGHAM
Aircraft Owner State AK
Aircraft Owner Country
Aircraft Owner Zipcode 99567
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 YUAA
Owner has at least one certificate Yes - certificate holder
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 Non-scheduled
Indicates Domestic or International Flight Domestic
Operator carrying Pax/Cargo/Mail Passenger Only
Type of Flying (Per_Bus / Primary) Unknown
Second Pilot on Board No
Departure Point Same as Event No
Departure Airport Code 175Z
Departure City MANOKOTAK
Departure State AK
Departure Country
Departure Time 1000
Departure Time Zone ADT
Destination Same as Local Flt --
Destination Airport Code DLG
Destination City DILLINGHAM
Destination State AK
Destination Country
Specific Phase of Flight Cruise
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 0
Runway Width 0
Sight Seeing flight No
Air Medical Flight No
Medical Flight --