Individually Owned: 150,657
Corporate Owned: 137,281
Silver City Airport
Aircraft Accident/Incident Report
Helena, Montana 59601
Wednesday, December 15, 1999 15:30 MST
NTSB Narrative Summary Released at Completion of Accident
The pilot stated that on his second touch-and-go landing at the airstrip, about half way down the runway, the left wheel separated and the airplane nosed over. FAA inspectors observed that the left wheel and gear extension had separated from the left main landing gear leg and were found off the runway on the left side. Surface tracks indicated that the airplane had been tracking along the centerline of the runway, and that the airplane had continued to track down the centerline for an additional 30 yards before it nosed over. The four left main landing gear extension attachment bolts were inspected by the NTSB's material laboratory. Examination revealed that all four bolts were bent through the shank portion; however, none of the bolts were separated. Additionally, the threads in each bolt were scraped on the convex side of the bend, as if from sliding out of the bolt hole. Three of the four bolts exhibited what appeared to be stripped threads of their corresponding nuts in their thread grooves. No evidence was found of the presence of a nut on the fourth bolt. Records revealed that the airplane had received an annual inspection on November 11, 1999, and it had accumulated seven hours of operation since that inspection.
NTSB Probable Cause Narrative
Separation of the left main landing gear. Factors include inadequate preflight inspection by the pilot, and inadequate inspection at the time of annual inspection by maintenance personnel.
Event Information
| Type of Event | Accident |
| Event Date | 12/15/1999 |
| Event Day of the Week | Wednesday |
| Time of Event | 1530 |
| Event Time Zone | Mountain Standard Time |
| Event City | HELENA |
| Event State | MONTANA |
| Event Country | -- |
| Zipcode of the event site | 59601 |
| Event Date Year | 1999 |
| Event Date Month | 12 |
| MidAir Collision Indicator | No |
| On Ground Collision occurred ? | No |
| Event Location Latitude | -- |
| Event Location Longitude | -- |
| Event Location Airport | SILVER CITY |
| Event Location Nearest Airport ID | MT18 |
| 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 | 4380 |
| Weather Briefing Completeness | Not pertinent |
| 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 | Day |
| 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) | 20 |
| Air Temperature at event time (in degrees celsius) | -1 |
| Dew Point at event time (in degress fahrenheit) | -- |
| Wind Direction (degrees magnetic) | 0 |
| Variable Wind Indicator | Unknown |
| Wind Speed (knots) | 0 |
| Wind Velocity Indicator | Calm |
| Wind Gust Indicator | Not Gusting |
| Wind Gust (knots) | 0 |
| Altimeter Setting at event time (in. Hg) | -- |
| Density Altitude (feet) | -- |
| Intensity of Precipitation | Unknown |
| METAR weather report | -- |
| Event Highest Injury | None |
| On Ground, Fatal Injuries | 0 |
| On Ground, Minor Injuries | 0 |
| On Ground, Serious Injuries | 0 |
| Injury Total Fatal | -- |
| Injury Total Minor | -- |
| Injury Total None | 1 |
| Injury Total Serious | -- |
| Injury Total All | -- |
| Investigating Agency | NTSB |
| NTSB Docket Number (internal use) | 1794 |
| NTSB Notification Source | -- |
| NTSB Notification Date | Dec 15 1999 12:00AM |
| NTSB Notification Time | 1500 |
| Fiche Number and/or location -used to find docket information | IMAGE |
| Date of most recent change to record | May 25 2001 4:45AM |
| User who most recently changed record | dbo |
| Basic weather conditions | Visual Meteorological Cond |
| FAA District Office | -- |
Aircraft Involved |
|
|---|---|
Aircraft #1 |
|
| Aircraft Registration Number | N2739N |
| NTSB Number | SEA00LA032 |
| 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 | 140 |
| Aircraft Series Identifier | 140 |
| Aircraft Serial Number | 12997 |
| Certified Max Gross Weight | 1450 |
| 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 | 2 |
| Number of Engines | 1 |
| Fixed gear or retractable gear | Fixed |
| Aircraft, Type of Last Inspection | Annual |
| Date of Last Inspection | Nov 11 1999 12:00AM |
| Airframe hours since last inspection | 7 |
| Airframe Hours | 2341 |
| ELT Installed | Yes |
| ELT Activated | Yes |
| ELT Aided Location of Event Site | No |
| ELT Type | -- |
| Aircraft Owner Name | JOHN A PADILLA |
| Aircraft Owner Street Address | 3430 WESTON |
| Aircraft Owner City | HELENA |
| Aircraft Owner State | MT |
| Aircraft Owner Country | |
| Aircraft Owner Zipcode | 59601 |
| 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 | HLN |
| Departure City | HELENA |
| Departure State | MT |
| Departure Country | |
| Departure Time | 1400 |
| Departure Time Zone | MST |
| Destination Same as Local Flt | crash at destination city |
| Destination Airport Code | |
| Destination City | |
| Destination State | |
| Destination Country | |
| Specific Phase of Flight | -- |
| Report sent to ICAO? | -- |
| Evacuation occurred | -- |
| Date of most recent change to record | May 25 2001 4:10AM |
| User who most recently changed record | dbo |
| Since inspection or accident | -- |
| Event Location Runway Number and Location | 8 |
| Runway Length | 4000 |
| Runway Width | 85 |
| Sight Seeing flight | No |
| Air Medical Flight | No |
| Medical Flight | -- |