Aircraft Accident/Incident Report

Pe Ell, Washington 98572
Saturday, July 20, 2002 10:30 PDT

NTSB Narrative Summary Released at Completion of Accident

During a VFR cross-country flight, the engine started running rough and would only develop about 2,300 RPM. The pilot tried using carburetor heat for about 90 seconds, without effect. Then some smoke or oil started coming from the engine area. Soon thereafter the pilot heard a "bang" and saw something depart the engine area, and the engine lost all power. He then performed a power-off landing in an old grown-over clear-cut area, and as the aircraft touched down it became entangled in the high vegetation and nosed over. It was later determined that the #2 cylinder had fractured completely around the circumference of the barrel. The cylinder was examined by the NTSB materials laboratory, and it was determined that the cylinder failure was the result of the propagation of a fatigue crack that initiated in the root area between the eighth and ninth cooling fins. The crack advanced circumferentially until the cylinder wall failed between the eighth and tenth fins. Further examination of the initiation site revealed no evidence of surface or material defects, and in the area of the fracture, the cylinder met the drawing requirements for hardness, wall thickness, fin root radius, and material composition and processing. There was no evidence of inadequate lubrication or overheating, and no root cause for the initiation of the fatigue fracture could be determined.

NTSB Probable Cause Narrative

The fatigue failure of the number two engine cylinder for undetermined reasons during cruise flight. Factors include high vegetation in the area where the pilot found it necessary to make a forced landing.

Event Information

Type of Event Accident
Event Date 7/20/2002
Event Day of the Week Saturday
Time of Event 1030
Event Time Zone Pacific Daylight Time
Event City Pe Ell
Event State WASHINGTON
Event Country --
Zipcode of the event site 98572
Event Date Year 2002
Event Date Month 7
MidAir Collision Indicator No
On Ground Collision occurred ? No
Event Location Latitude 463155N
Event Location Longitude 1231811W
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) --
Air Temperature at event time (in degrees celsius) 22
Dew Point at event time (in degress fahrenheit) 13
Wind Direction (degrees magnetic) 300
Variable Wind Indicator Wind direction could be determined
Wind Speed (knots) 10
Wind Velocity Indicator --
Wind Gust Indicator Not Gusting
Wind Gust (knots) --
Altimeter Setting at event time (in. Hg) 30.13
Density Altitude (feet) --
Intensity of Precipitation --
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 2
Injury Total All 2
Investigating Agency NTSB
NTSB Docket Number (internal use) 14488
NTSB Notification Source FAA ROC
NTSB Notification Date Jul 20 2002 12:00AM
NTSB Notification Time 1315
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 Seattle (Renton), WA

Aircraft Involved

Aircraft #1

Aircraft Registration Number N51286
NTSB Number SEA02LA133
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 Cessna
Aircraft Model 150J
Aircraft Series Identifier --
Aircraft Serial Number 15069896
Certified Max Gross Weight 1600
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 Jan 11 2002 12:00AM
Airframe hours since last inspection 81
Airframe Hours 3198.3
ELT Installed Yes
ELT Activated Yes
ELT Aided Location of Event Site No
ELT Type --
Aircraft Owner Name David D. Brophy
Aircraft Owner Street Address P.O. Box 63
Aircraft Owner City Silverdale
Aircraft Owner State WA
Aircraft Owner Country USA
Aircraft Owner Zipcode 98383
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 S50
Departure City Auburn
Departure State WA
Departure Country USA
Departure Time 920
Departure Time Zone PDT
Destination Same as Local Flt --
Destination Airport Code CLS
Destination City CHEHALIS
Destination State WA
Destination Country USA
Specific Phase of Flight Cruise
Report sent to ICAO? No
Evacuation occurred --
Date of most recent change to record Oct 6 2003 11:54AM
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 --