Aircraft Accident/Incident Report

Mount Pleasant, Texas 75455
Sunday, October 6, 1996 22:30 CDT

NTSB Narrative Summary Released at Completion of Accident

According to the pilot, during cruise flight at 5,000 feet MSL, he smelled oil burning. As engine RPM decreased, the oil pressure dropped toward zero. Subsequently, there was an 'explosion' and the engine seized. During the ensuing forced landing, the airplane impacted trees, and came to rest on the ground in a left wing down attitude. A 3 inch diameter hole was found in the crankcase above the #3 cylinder attach point and the #3 connecting rod was separated. During engine disassembly, one of the connecting rod cap bolts for the #3 cylinder was found destroyed. One of the nuts for the #3 connecting rod cap was found laying in the piston skirt, separated from its bolt. The exterior of the nut and its threads were undamaged to the naked eye. No loose cotter pins were found within the engine. All other connecting rod cap bolts were found attached and cotter pinned. The end cap of the #2 piston pin was missing. The inner surface of the #2 cylinder barrel exhibited longitudinal scoring in the direction of piston action, corresponding to the diameter of the piston pin. 1 day prior to the accident, oil was changed and metal particles were found on the oil screen.

NTSB Probable Cause Narrative

The total loss of engine power due to the #3 connecting rod separation resulting in engine seizure. Factors were the dark night and the lack of suitable terrain for the forced landing.

Event Information

Type of Event Accident
Event Date 10/6/1996
Event Day of the Week Sunday
Time of Event 2230
Event Time Zone Central Daylight Time
Event City MOUNT PLEASANT
Event State TEXAS
Event Country --
Zipcode of the event site 75455
Event Date Year 1996
Event Date Month 10
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 --
Degrees magnetic from airport --
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 Night/Dark
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) 15
Air Temperature at event time (in degrees celsius) 16
Dew Point at event time (in degress fahrenheit) 7
Wind Direction (degrees magnetic) 100
Variable Wind Indicator Unknown
Wind Speed (knots) 5
Wind Velocity Indicator Unknown
Wind Gust Indicator Not Gusting
Wind Gust (knots) 0
Altimeter Setting at event time (in. Hg) 30
Density Altitude (feet) --
Intensity of Precipitation Unknown
METAR weather report --
Event Highest Injury Serious
On Ground, Fatal Injuries 0
On Ground, Minor Injuries 0
On Ground, Serious Injuries 0
Injury Total Fatal --
Injury Total Minor --
Injury Total None --
Injury Total Serious 1
Injury Total All 1
Investigating Agency NTSB
NTSB Docket Number (internal use) 1280
NTSB Notification Source --
NTSB Notification Date Oct 7 1996 12:00AM
NTSB Notification Time 1213
Fiche Number and/or location -used to find docket information IMAGE
Date of most recent change to record Dec 8 2000 10:24AM
User who most recently changed record dbo
Basic weather conditions Visual Meteorological Cond
FAA District Office --

Aircraft Involved

Aircraft #1

Aircraft Registration Number N8171T
NTSB Number FTW97LA006
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 Cessna
Aircraft Model 175B
Aircraft Series Identifier 175B
Aircraft Serial Number 17556871
Certified Max Gross Weight 2350
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 Fixed
Aircraft, Type of Last Inspection Annual
Date of Last Inspection Feb 20 1996 12:00AM
Airframe hours since last inspection 64
Airframe Hours 3311
ELT Installed Unknown
ELT Activated Unknown
ELT Aided Location of Event Site Unknown
ELT Type --
Aircraft Owner Name CECIL W. WILEY
Aircraft Owner Street Address RR 9 BOX 1597
Aircraft Owner City MT PLEASANT
Aircraft Owner State TX
Aircraft Owner Country
Aircraft Owner Zipcode 75455
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 F62
Departure City IDABEL
Departure State OK
Departure Country
Departure Time 2206
Departure Time Zone CDT
Destination Same as Local Flt --
Destination Airport Code MSA
Destination City MOUNT PLEASANT
Destination State TX
Destination Country
Specific Phase of Flight --
Report sent to ICAO? --
Evacuation occurred --
Date of most recent change to record Jan 2 2001 10:34AM
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 --