Individually Owned: 150,657
Corporate Owned: 137,281
Twisp Municipal Airport
Aircraft Accident/Incident Report
Twisp, Washington 98856
Monday, May 1, 1995 10:30 PDT
NTSB Narrative Summary Released at Completion of Accident
AFTER SEVERAL TOUCH-AND-GO LANDINGS, THE PRIVATE PILOT MADE A FULL STOP LANDING, TAXIED BACK, AND TOOK OFF AGAIN. NO PROBLEMS WERE REPORTED DURING THE TAKEOFF. THE PILOT ENTERED THE TRAFFIC PATTERN AND ATTEMPTED ANOTHER LANDING. THE PILOT STATED THAT SHE IMMEDIATELY LOST DIRECTIONAL CONTROL OF THE AIRPLANE AFTER THE NOSE LANDING GEAR SETTLED ONTO THE RUNWAY. THE AIRPLANE VEERED OFF THE LEFT SIDE OF THE RUNWAY, SKIDDED INTO THE DIRT, NOSED OVER, AND WAS SUBSTANTIALLY DAMAGED. EXAMINATION OF THE NOSE LANDING GEAR ASSEMBLY REVEALED THAT THE CENTER SCISSOR BOLT WAS MISSING AND THE NOSE GEAR WAS COCKED TO ONE SIDE. THE BOLT WAS FOUND ON THE RUNWAY ABOUT 800 FEET FROM THE WRECKAGE. EXAMINATION OF THE BOLT REVEALED THAT NO COTTER KEY HAD BEEN INSTALLED TO SECURE THE NUT.
NTSB Probable Cause Narrative
THE IMPROPER INSTALLATION OF A NOSE LANDING GEAR ASSEMBLY BOLT (NO COTTER KEY INSTALLED) BY UNKNOWN MAINTENANCE PERSONNEL. THIS LED TO A FAILURE OF THE NOSE LANDING GEAR STEERING AND SUBSEQUENT NOSEOVER DURING LANDING ROLLOUT.
Event Information
| Type of Event | Accident |
| Event Date | 5/1/1995 |
| Event Day of the Week | Monday |
| Time of Event | 1030 |
| Event Time Zone | Pacific Daylight Time |
| Event City | TWISP |
| Event State | WASHINGTON |
| Event Country | -- |
| Zipcode of the event site | 98856 |
| Event Date Year | 1995 |
| Event Date Month | 5 |
| MidAir Collision Indicator | No |
| On Ground Collision occurred ? | No |
| Event Location Latitude | |
| Event Location Longitude | |
| Event Location Airport | TWISP MUNICIPAL |
| Event Location Nearest Airport ID | 2S0 |
| 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 | 1597 |
| Weather Briefing Completeness | Unknown |
| Investigator's weather source | Weather Observation Facility |
| Time of the weather observation | 1034 Pacific Daylight Time |
| Direction of event from weather observation facility (degrees) | 10 |
| Weather Observation Facility ID | EAT |
| Elevation of weather observation facility | 1245 |
| Distance of event from weather observation facility (units?) | 37 |
| Time Zone of the weather observation | PDT |
| 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) | 10 |
| Air Temperature at event time (in degrees celsius) | 11 |
| Dew Point at event time (in degress fahrenheit) | 2 |
| Wind Direction (degrees magnetic) | 310 |
| 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) | 29 |
| Density Altitude (feet) | -- |
| Intensity of Precipitation | Unknown |
| METAR weather report | -- |
| Event Highest Injury | Minor |
| On Ground, Fatal Injuries | 0 |
| On Ground, Minor Injuries | 0 |
| On Ground, Serious Injuries | 0 |
| Injury Total Fatal | -- |
| Injury Total Minor | 1 |
| Injury Total None | -- |
| Injury Total Serious | -- |
| Injury Total All | 1 |
| Investigating Agency | NTSB |
| NTSB Docket Number (internal use) | 1002 |
| NTSB Notification Source | -- |
| NTSB Notification Date | May 1 1995 12:00AM |
| NTSB Notification Time | 1045 |
| Fiche Number and/or location -used to find docket information | IMAGE |
| Date of most recent change to record | Dec 7 2000 4:16PM |
| User who most recently changed record | dbo |
| Basic weather conditions | Visual Meteorological Cond |
| FAA District Office | -- |
Aircraft Involved |
|
|---|---|
Aircraft #1 |
|
| Aircraft Registration Number | N2548Y |
| NTSB Number | SEA95LA087 |
| 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 | 172 |
| Aircraft Series Identifier | 172 |
| Aircraft Serial Number | 17249848 |
| Certified Max Gross Weight | 2400 |
| Aircraft Category | Airplane |
| Aircraft Registration Class | Unknown |
| 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 | Sep 18 1994 12:00AM |
| Airframe hours since last inspection | 54 |
| Airframe Hours | 3234 |
| ELT Installed | Yes |
| ELT Activated | Yes |
| ELT Aided Location of Event Site | No |
| ELT Type | -- |
| Aircraft Owner Name | METHOW VALLEY FLYERS, INC. |
| Aircraft Owner Street Address | P.O. BOX 500 |
| Aircraft Owner City | TWISP |
| Aircraft Owner State | WA |
| Aircraft Owner Country | |
| Aircraft Owner Zipcode | 98856 |
| 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 | Yes |
| Departure Airport Code | |
| Departure City | |
| Departure State | |
| Departure Country | |
| Departure Time | 1030 |
| Departure Time Zone | PDT |
| 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? | -- |
| 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 | 28 |
| Runway Length | 2700 |
| Runway Width | 40 |
| Sight Seeing flight | No |
| Air Medical Flight | No |
| Medical Flight | -- |