London-Corbin Airport
Aircraft Accident/Incident Report

London, Kentucky 40741
Friday, August 20, 2004 17:30 EDT

NTSB Narrative Summary Released at Completion of Accident

While the pilot was practicing takeoffs and landings in the recently-purchased airplane, he performed one landing that was "a pretty good jolt," but "not extraordinary." Following the flight, the pilot noticed damage to the left wing's upper skin. Further examination revealed that a portion of the left wing rib cap was fractured, and that there were two sets of double-drilled, overlapping rivet holes that matched up with holes partially drilled into a false spar. The false spar was covered with a green (preservative) paint, while the partially-drilled holes were not. The rib cap fracture surface exhibited fatigue cracking that did not extend into the overlapping rivet holes. A review of the airplane's maintenance logs revealed no evidence of repair to the affected area. The airplane, which was manufactured in 1971, had 5,529 hours of operating time.

NTSB Probable Cause Narrative

An undocumented, improper repair attempt, which subsequently resulted in fatigue cracking to the rib cap.

Event Information

Type of Event Accident
Event Date 8/20/2004
Event Day of the Week Friday
Time of Event 1730
Event Time Zone Eastern Daylight Time
Event City London
Event State KENTUCKY
Event Country --
Zipcode of the event site 40741
Event Date Year 2004
Event Date Month 8
MidAir Collision Indicator No
On Ground Collision occurred ? No
Event Location Latitude 370513N
Event Location Longitude 0840438W
Event Location Airport London-Corbin Airport
Event Location Nearest Airport ID LOZ
Indicates whether the acc/inc occurred off or on an airport On Airport
Distance from airport in statute miles --
Degrees magnetic from airport --
Airport Elevation 1212
Weather Briefing Completeness Unknown
Investigator's weather source Weather Observation Facility
Time of the weather observation 1753 Eastern Daylight Time
Direction of event from weather observation facility (degrees) 0
Weather Observation Facility ID LOZ
Elevation of weather observation facility 1212
Distance of event from weather observation facility (units?) 0
Time Zone of the weather observation EDT
Lighting Conditions --
Lowest Ceiling Height --
Lowest Non-Ceiling Height 2800
Sky/Lowest/Cloud Conditions Scattered
Sky Condition for Lowest Ceiling None
Visibility Runway Visual Range (Feet) --
Visibility Runway Visual Value (Statute Miles) --
Visibility (Statute Miles) 7
Air Temperature at event time (in degrees celsius) 25
Dew Point at event time (in degress fahrenheit) 20
Wind Direction (degrees magnetic) 210
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) 29.98
Density Altitude (feet) --
Intensity of Precipitation --
METAR weather report --
Event Highest Injury None
On Ground, Fatal Injuries --
On Ground, Minor Injuries --
On Ground, Serious Injuries --
Injury Total Fatal --
Injury Total Minor --
Injury Total None 1
Injury Total Serious --
Injury Total All --
Investigating Agency NTSB
NTSB Docket Number (internal use) 17178
NTSB Notification Source Louisville FSDO
NTSB Notification Date Sep 4 2004 12:00AM
NTSB Notification Time 1530
Fiche Number and/or location -used to find docket information DMS
Date of most recent change to record Jan 27 2005 3:52PM
User who most recently changed record NTSB\JOHB
Basic weather conditions Visual Meteorological Cond
FAA District Office Louisville FSDO

Aircraft Involved

Aircraft #1

Aircraft Registration Number N2330T
NTSB Number IAD04LA041
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 Piper
Aircraft Model PA-28R-180
Aircraft Series Identifier --
Aircraft Serial Number 28R-7130010
Certified Max Gross Weight 2500
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 Annual
Date of Last Inspection Aug 12 2003 12:00AM
Airframe hours since last inspection 33
Airframe Hours 5529
ELT Installed Yes
ELT Activated No
ELT Aided Location of Event Site No
ELT Type --
Aircraft Owner Name Larry J Thomas
Aircraft Owner Street Address --
Aircraft Owner City Corbin
Aircraft Owner State KY
Aircraft Owner Country USA
Aircraft Owner Zipcode 40701
Operator is an individual? Yes
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 Yes
Departure Airport Code LOZ
Departure City London
Departure State KY
Departure Country USA
Departure Time --
Departure Time Zone EDT
Destination Same as Local Flt dest & departure same, accident can occur anywhere
Destination Airport Code --
Destination City --
Destination State --
Destination Country --
Specific Phase of Flight Landing
Report sent to ICAO? No
Evacuation occurred No
Date of most recent change to record --
User who most recently changed record --
Since inspection or accident Last Inspection
Event Location Runway Number and Location NA
Runway Length --
Runway Width --
Sight Seeing flight No
Air Medical Flight No
Medical Flight --