Individually Owned: 150,657
Corporate Owned: 137,281
N/A Airport
Aircraft Accident/Incident Report
Aiken, Texas 79221
Thursday, September 27, 2001 9:05 CDT
NTSB Narrative Summary Released at Completion of Accident
The pilot was maneuvering the agricultural airplane to enter a field and commence spraying, when at 120 feet agl, the engine lost power. The pilot attempted to restart the engine; however, the engine did not restart. During the ensuing forced landing, the airplane contacted circular rows of cotton, before coming to rest upright. The engine was examined at the manufacturer's facility and silicon sealant was observed on the base flanges of the #1, #2, #4, and #6 cylinders and on the crankcase mating surfaces. Fretting was observed on the base flanges of the cylinders, on the mating surface of the crankcase halves, and on the main bearing bosses. The #2 main bearing was observed fragmented and the bearing's bore was cracked and damaged. Additionally, it was observed that the crankshaft was fractured between the #2 main bearing and #3 crankshaft cheek. According to a TCM metallurgist, the fatigue fracture's origin was determined to be at the aft radius of the #2 main bearing. The silicon sealant prevented proper torqueing of the bolts that mate the crankcase halves and led to vibration at the crankcase mating surfaces. The #2 main bearing then shifted and failed, resulting in a loss of engine power.
NTSB Probable Cause Narrative
the application of silicon sealant to the crankcase mating surfaces by maintenance personnel, which resulted in improper torque on the bolts which mate the crankcase halves, vibration, and the subsequent failure of the #2 main crankshaft bearing. A factor was the lack of suitable terrain for the forced landing.
Event Information
| Type of Event | Accident |
| Event Date | 9/27/2001 |
| Event Day of the Week | Thursday |
| Time of Event | 905 |
| Event Time Zone | Central Daylight Time |
| Event City | Aiken |
| Event State | TEXAS |
| Event Country | -- |
| Zipcode of the event site | 79221 |
| Event Date Year | 2001 |
| Event Date Month | 9 |
| MidAir Collision Indicator | No |
| On Ground Collision occurred ? | No |
| Event Location Latitude | 340724N |
| Event Location Longitude | 1013106W |
| Event Location Airport | N/A |
| Event Location Nearest Airport ID | -- |
| Indicates whether the acc/inc occurred off or on an airport | -- |
| Distance from airport in statute miles | -- |
| Degrees magnetic from airport | -- |
| Airport Elevation | -- |
| Weather Briefing Completeness | Unknown |
| Investigator's weather source | Weather Observation Facility |
| Time of the weather observation | 1053 Central Standard Time |
| Direction of event from weather observation facility (degrees) | 30 |
| Weather Observation Facility ID | LBB |
| Elevation of weather observation facility | 3282 |
| Distance of event from weather observation facility (units?) | 42 |
| Time Zone of the weather observation | CST |
| 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) | 10 |
| Air Temperature at event time (in degrees celsius) | 22 |
| Dew Point at event time (in degress fahrenheit) | 7 |
| Wind Direction (degrees magnetic) | 180 |
| 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) | 30.12 |
| Density Altitude (feet) | 4667 |
| 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) | 12102 |
| NTSB Notification Source | FAA |
| NTSB Notification Date | Sep 27 2001 12:00AM |
| NTSB Notification Time | 1804 |
| Fiche Number and/or location -used to find docket information | DMS |
| Date of most recent change to record | Aug 26 2002 11:02AM |
| User who most recently changed record | NTSB\MONR |
| Basic weather conditions | Visual Meteorological Cond |
| FAA District Office | Lubbock Texas |
Aircraft Involved |
|
|---|---|
Aircraft #1 |
|
| Aircraft Registration Number | N4629J |
| NTSB Number | FTW01LA210 |
| Missing Aircraft Indicator | -- |
| Federal Aviation Reg. Part | Part 137: Agricultural |
| 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 | T188C |
| Aircraft Series Identifier | -- |
| Aircraft Serial Number | t18803757T |
| Certified Max Gross Weight | 4400 |
| 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 | 1 |
| Number of Engines | 1 |
| Fixed gear or retractable gear | Fixed |
| Aircraft, Type of Last Inspection | Annual |
| Date of Last Inspection | May 10 2001 12:00AM |
| Airframe hours since last inspection | 113 |
| Airframe Hours | -- |
| ELT Installed | No |
| ELT Activated | No |
| ELT Aided Location of Event Site | No |
| ELT Type | -- |
| Aircraft Owner Name | John Wesley Addison |
| Aircraft Owner Street Address | 910 SW 9th Street |
| Aircraft Owner City | Seminole |
| Aircraft Owner State | TX |
| Aircraft Owner Country | USA |
| Aircraft Owner Zipcode | 79360 |
| Operator is an individual? | No |
| Operator Name | Addison Spraying Service |
| Operator Same as Owner? | No |
| Operator Is Doing Business As | -- |
| Operator Address Same as Owner? | No |
| Operator Street Address | 202 South Broadway, #216 |
| Operator City | Plainview |
| Operator State | TX |
| Operator Country | USA |
| Operator Zip code | 79221 |
| Operator Code | ADGG |
| Owner has at least one certificate | -- |
| Other Operator of large aircraft? | -- |
| Certified for Part 133 or 137 Operation | Agriculture |
| 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) | Aerial Application |
| Second Pilot on Board | No |
| Departure Point Same as Event | Yes |
| Departure Airport Code | PVW |
| Departure City | Aiken |
| Departure State | TX |
| Departure Country | USA |
| Departure Time | 900 |
| Departure Time Zone | CDT |
| 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 | Maneuvering - aerial application |
| Report sent to ICAO? | No |
| Evacuation occurred | Yes |
| Date of most recent change to record | Jul 19 2002 5:01PM |
| User who most recently changed record | SNYG |
| Since inspection or accident | -- |
| Event Location Runway Number and Location | -- |
| Runway Length | -- |
| Runway Width | -- |
| Sight Seeing flight | No |
| Air Medical Flight | No |
| Medical Flight | -- |