Individually Owned: 150,657
Corporate Owned: 137,281
Polk County - Cornelius Airport
Aircraft Accident/Incident Report
Cedartown, Georgia 30125
Sunday, April 10, 2011 11:45 EDT
NTSB Narrative Summary Released at Completion of Accident
The pilot received an unsafe landing gear indication for the left main landing gear when he configured the airplane for landing. He cycled the gear and then attempted a manual extension, both without success. The pilot then completed the landing on the nose and right main landing gear. A postaccident examination of the left main landing gear actuator revealed that the supports for the actuator bearings lacked lubrication and that the bearings displayed wear due to inadequate lubrication. The overhauled actuator had accumulated 377.5 hours and 285 cycles since overhaul and was installed about 31 months before the accident; the manufacturer's maintenance manual prescribed lubrication of the retract actuator and actuator support bearings every 1,000 cycles or 30 months (whichever occurs first). It could not be determined if inadequate lubrication was applied at installation or if a loss of lubrication was not detected in subsequent inspections. The manufacturer’s maintenance manual cautioned: "When washing the airplane with soap and water, use special care to avoid washing grease away from lubricated area. After washing the wheel well areas with solvent, lubricate all lubrication points. Premature wear of the lubricated surfaces may result if these precautions are not observed."
NTSB Probable Cause Narrative
The failure of the left main landing gear bearings and supports due to inadequate lubrication by unknown maintenance personnel.
Event Information
| Type of Event | Accident |
| Event Date | 4/10/2011 |
| Event Day of the Week | Sunday |
| Time of Event | 1145 |
| Event Time Zone | Eastern Daylight Time |
| Event City | Cedartown |
| Event State | GEORGIA |
| Event Country | -- |
| Zipcode of the event site | 30125 |
| Event Date Year | 2011 |
| Event Date Month | 4 |
| MidAir Collision Indicator | No |
| On Ground Collision occurred ? | No |
| Event Location Latitude | 340104N |
| Event Location Longitude | 0850828W |
| Event Location Airport | Polk County Airport- Cornelius |
| Event Location Nearest Airport ID | 4A4 |
| Indicates whether the acc/inc occurred off or on an airport | On Airport |
| Distance from airport in statute miles | 0 |
| Degrees magnetic from airport | -- |
| Airport Elevation | 974 |
| Weather Briefing Completeness | -- |
| Investigator's weather source | Weather Observation Facility |
| Time of the weather observation | 1135 Eastern Daylight Time |
| Direction of event from weather observation facility (degrees) | 135 |
| Weather Observation Facility ID | PUJ |
| Elevation of weather observation facility | 1289 |
| Distance of event from weather observation facility (units?) | 12 |
| Time Zone of the weather observation | EDT |
| 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) | 21 |
| Dew Point at event time (in degress fahrenheit) | 17 |
| Wind Direction (degrees magnetic) | -- |
| Variable Wind Indicator | -- |
| Wind Speed (knots) | -- |
| Wind Velocity Indicator | Calm |
| Wind Gust Indicator | -- |
| Wind Gust (knots) | -- |
| Altimeter Setting at event time (in. Hg) | 30.12 |
| Density Altitude (feet) | -- |
| Intensity of Precipitation | -- |
| METAR weather report | 101335Z AUTO 00000KT 10SM CLR 21/17 A3012 RMK |
| 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) | 29476 |
| NTSB Notification Source | FAA Southern ROC |
| NTSB Notification Date | -- |
| NTSB Notification Time | -- |
| Fiche Number and/or location -used to find docket information | -- |
| Date of most recent change to record | Dec 30 2011 3:43PM |
| User who most recently changed record | kenj |
| Basic weather conditions | Visual Meteorological Cond |
| FAA District Office | -- |
Aircraft Involved |
|
|---|---|
Aircraft #1 |
|
| Aircraft Registration Number | N899AE |
| NTSB Number | ERA11LA239 |
| 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 | BEECH |
| Aircraft Model | BE99 |
| Aircraft Series Identifier | -- |
| Aircraft Serial Number | U23 |
| Certified Max Gross Weight | 10900 |
| Aircraft Category | Airplane |
| Aircraft Registration Class | -- |
| Aircraft is a homebuilt? | No |
| Flight Crew Seats | 2 |
| Cabin Crew Seats | -- |
| Passenger Seats | -- |
| Total number of seats on the aircraft | 2 |
| Number of Engines | 2 |
| Fixed gear or retractable gear | Retractable |
| Aircraft, Type of Last Inspection | 100 Hour |
| Date of Last Inspection | Feb 14 2011 12:00AM |
| Airframe hours since last inspection | 7 |
| Airframe Hours | 48953 |
| ELT Installed | Yes |
| ELT Activated | No |
| ELT Aided Location of Event Site | No |
| ELT Type | Unknown |
| Aircraft Owner Name | Aerodynamics Worldwide Inc. |
| Aircraft Owner Street Address | 1220 N Market St. STE 808 |
| Aircraft Owner City | Wilmington |
| Aircraft Owner State | DE |
| Aircraft Owner Country | USA |
| Aircraft Owner Zipcode | 19801 |
| Operator is an individual? | No |
| Operator Name | Skydive Georgia |
| Operator Same as Owner? | No |
| Operator Is Doing Business As | -- |
| Operator Address Same as Owner? | No |
| Operator Street Address | -- |
| Operator City | Cedartown |
| Operator State | GA |
| Operator Country | USA |
| Operator Zip code | 30125 |
| 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) | Skydiving |
| Second Pilot on Board | No |
| Departure Point Same as Event | Yes |
| Departure Airport Code | 4A4 |
| Departure City | Cedartown |
| Departure State | GA |
| Departure Country | USA |
| Departure Time | 1110 |
| Departure Time Zone | EDT |
| Destination Same as Local Flt | dest & departure same, accident can occur anywhere |
| Destination Airport Code | 4A4 |
| Destination City | Cedartown |
| Destination State | GA |
| Destination Country | USA |
| Specific Phase of Flight | -- |
| Report sent to ICAO? | -- |
| Evacuation occurred | -- |
| Date of most recent change to record | Dec 30 2011 3:43PM |
| User who most recently changed record | kenj |
| Since inspection or accident | Time of Accident |
| Event Location Runway Number and Location | -- |
| Runway Length | 4004 |
| Runway Width | 75 |
| Sight Seeing flight | No |
| Air Medical Flight | No |
| Medical Flight | -- |