Aircraft Accident/Incident Report

Slaton, Texas 79364
Friday, March 5, 2010 16:30 CST

NTSB Narrative Summary Released at Completion of Accident

While at 5,500 feet mean sea level, the pilot heard a loud explosion and the left front engine cowling blew open. Shortly thereafter the engine stopped producing power and the pilot executed a forced landing to a flat plowed field. The No. 2 cylinder was found separated from the engine crankcase. A postaccident engine teardown examination revealed that there had been an insufficient clamping force between the crankcase halves and between each cylinder and the crankcase. In particular, the No. 2 crankcase cylinder deck exhibited signatures consistent with the No. 2 cylinder vibrating back and forth before it exited the engine case. At the time of the accident, the engine had accumulated approximately 1,072 hours since major overhaul and 641 hours since a top overhaul.

NTSB Probable Cause Narrative

The loss of engine power due to the insufficient clamping force between the two crankcase halves and each cylinder to the crankcase.

Event Information

Type of Event Accident
Event Date 3/5/2010
Event Day of the Week Friday
Time of Event 1630
Event Time Zone Central Standard Time
Event City Slaton
Event State TEXAS
Event Country --
Zipcode of the event site 79364
Event Date Year 2010
Event Date Month 3
MidAir Collision Indicator No
On Ground Collision occurred ? No
Event Location Latitude 332926N
Event Location Longitude 1013515W
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 --
Investigator's weather source Weather Observation Facility
Time of the weather observation 1553 Central Standard Time
Direction of event from weather observation facility (degrees) 315
Weather Observation Facility ID LBB
Elevation of weather observation facility 3282
Distance of event from weather observation facility (units?) 16
Time Zone of the weather observation CST
Lighting Conditions Day
Lowest Ceiling Height --
Lowest Non-Ceiling Height 7000
Sky/Lowest/Cloud Conditions Few
Sky Condition for Lowest Ceiling None
Visibility Runway Visual Range (Feet) --
Visibility Runway Visual Value (Statute Miles) --
Visibility (Statute Miles) 10
Air Temperature at event time (in degrees celsius) 21
Dew Point at event time (in degress fahrenheit) 2
Wind Direction (degrees magnetic) 230
Variable Wind Indicator Wind direction could be determined
Wind Speed (knots) 6
Wind Velocity Indicator --
Wind Gust Indicator Not Gusting
Wind Gust (knots) --
Altimeter Setting at event time (in. Hg) 29.89
Density Altitude (feet) --
Intensity of Precipitation --
METAR weather report METAR KLBB 052153Z 23006KT 10SM FEW070 21/02 A2989
Event Highest Injury Minor
On Ground, Fatal Injuries --
On Ground, Minor Injuries --
On Ground, Serious Injuries --
Injury Total Fatal --
Injury Total Minor 1
Injury Total None --
Injury Total Serious --
Injury Total All 1
Investigating Agency NTSB
NTSB Docket Number (internal use) 27854
NTSB Notification Source FTW, FAA Regional Comm Center
NTSB Notification Date --
NTSB Notification Time --
Fiche Number and/or location -used to find docket information --
Date of most recent change to record Oct 26 2010 2:51PM
User who most recently changed record bowl
Basic weather conditions Visual Meteorological Cond
FAA District Office --

Aircraft Involved

Aircraft #1

Aircraft Registration Number N2036Y
NTSB Number CEN10LA140
Missing Aircraft Indicator --
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 A36
Aircraft Series Identifier --
Aircraft Serial Number E-1366
Certified Max Gross Weight 3800
Aircraft Category Airplane
Aircraft Registration Class --
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 Retractable
Aircraft, Type of Last Inspection Annual
Date of Last Inspection Aug 1 2009 12:00AM
Airframe hours since last inspection 77
Airframe Hours 5834
ELT Installed Yes
ELT Activated Yes
ELT Aided Location of Event Site Unknown
ELT Type Unknown
Aircraft Owner Name GALE DONALD H
Aircraft Owner Street Address 3717 NORTHWEST PKWY
Aircraft Owner City DALLAS
Aircraft Owner State TX
Aircraft Owner Country USA
Aircraft Owner Zipcode 75225-3701
Operator is an individual? No
Operator Name GALE DONALD H
Operator Same as Owner? Yes
Operator Is Doing Business As --
Operator Address Same as Owner? Yes
Operator Street Address 3717 NORTHWEST PKWY
Operator City DALLAS
Operator State TX
Operator Country USA
Operator Zip code 75225-3701
Operator Code --
Owner has at least one certificate None
Other Operator of large aircraft? No
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 LBB
Departure City Lubbock
Departure State TX
Departure Country USA
Departure Time 1620
Departure Time Zone CDT
Destination Same as Local Flt --
Destination Airport Code RBD
Destination City Dallas
Destination State TX
Destination Country USA
Specific Phase of Flight --
Report sent to ICAO? --
Evacuation occurred --
Date of most recent change to record Oct 15 2010 5:04PM
User who most recently changed record lebt
Since inspection or accident Time of Accident
Event Location Runway Number and Location N/A
Runway Length --
Runway Width --
Sight Seeing flight No
Air Medical Flight No
Medical Flight --