Individually Owned: 150,657
Corporate Owned: 137,281
Aircraft Accident/Incident Report
Tulare, California 93275
Wednesday, April 6, 1983 17:48 PST
NTSB Narrative Summary Released at Completion of Accident
THE ULTRALIGHT WAS ON A DEMONSTRATION FLT. REPORTEDLY, THE PLT MADE A PASS DOWN THE RWY, THEN HAD TURNED DOWNWIND AT 400 TO 500 FT, WHEN WITNESSES HEARD A LOUD BANG OR CRACK & SAW THE WINGS OF THE VEHICLE FOLD. THE ULTRALIGHT THEN ENTERED A SPIRAL & CRASHED IN A CANAL. AN EXAM REVEALED THAT THE WING HAD FOLDED DOWNWARD. COMPRESSION BUCKLING HAD OCCURRED AT THE WING CENTER SECTION. ALSO, THE MYLAR SKIN WAS FOUND SEPARATED FROM THE TOP & BOTTOM OF THE WING CENTER SECTION AT THE BONDED ATTACH AREAS. ACCORDING TO THE MANUFACTURER, LOSS OF THE MYLAR SKIN ON THE TOP OF THE WING WOULD RESULT IN AN AFT SHIFT IN THE CENTER OF PRESSURE & CAUSE THE VEHICLE TO PITCH FORWARD. WITNESSES THOUGHT THAT THE WINGS HAD FOLDED UPWARD, BUT THE INVESTIGATION VERIFIED THAT THEY FAILED IN A NEGATIVE MODE. AFTER THIS OCCURRENCE, THE MYLAR MATERIAL ON THE MITCHELL A-10 VEHICLES WAS REPLACED WITH CECONITE COVERING & WAS RIVETED IN PLACE WITH ALUMINUM BATTENS.ALTHOUGH THE PROTOTYPE HAD BALANCE WTS, THEY HAD BEEN REMOVED FROM PRODUCTION MODELS TO ELIMINATE WT.
NTSB Probable Cause Narrative
Not Yet Reported
Event Information
| Type of Event | Accident |
| Event Date | 4/6/1983 |
| Event Day of the Week | Wednesday |
| Time of Event | 1748 |
| Event Time Zone | Pacific Standard Time |
| Event City | TULARE |
| Event State | CALIFORNIA |
| Event Country | -- |
| Zipcode of the event site | 93275 |
| Event Date Year | 1983 |
| Event Date Month | 4 |
| MidAir Collision Indicator | No |
| On Ground Collision occurred ? | No |
| Event Location Latitude | |
| Event Location Longitude | |
| Event Location Airport | |
| Event Location Nearest Airport ID | TLR |
| Indicates whether the acc/inc occurred off or on an airport | Off Airport/Airstrip |
| Distance from airport in statute miles | 1 |
| Degrees magnetic from airport | 135 |
| Airport Elevation | -- |
| Weather Briefing Completeness | Not pertinent |
| Investigator's weather source | Witness |
| 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 | Dusk |
| 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) | 15 |
| Air Temperature at event time (in degrees celsius) | -- |
| 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 | Fatal |
| On Ground, Fatal Injuries | 0 |
| On Ground, Minor Injuries | 0 |
| On Ground, Serious Injuries | 0 |
| Injury Total Fatal | 1 |
| Injury Total Minor | -- |
| Injury Total None | -- |
| Injury Total Serious | -- |
| Injury Total All | 1 |
| Investigating Agency | NTSB |
| NTSB Docket Number (internal use) | 2241 |
| NTSB Notification Source | -- |
| NTSB Notification Date | -- |
| NTSB Notification Time | 0 |
| Fiche Number and/or location -used to find docket information | 22582 |
| Date of most recent change to record | Jan 2 2001 9:15AM |
| User who most recently changed record | dbo |
| Basic weather conditions | Visual Meteorological Cond |
| FAA District Office | -- |
Aircraft Involved |
|
|---|---|
Aircraft #1 |
|
| Aircraft Registration Number | NONE |
| NTSB Number | LAX83FU001 |
| Missing Aircraft Indicator | N |
| Federal Aviation Reg. Part | Part 103: Ultralight |
| Type of Flight Plan filed | None |
| Flight plan Was Activated? | -- |
| Damage | Destroyed |
| Aircraft Fire | None |
| Aircraft Explosion | None |
| Aircraft Manufacturer's Full Name | MITCHELL |
| Aircraft Model | A-10 |
| Aircraft Series Identifier | A-10 |
| Aircraft Serial Number | 102 |
| Certified Max Gross Weight | -- |
| Aircraft Category | Ultralight |
| Aircraft Registration Class | Not Registered |
| 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 | Unknown |
| Date of Last Inspection | -- |
| Airframe hours since last inspection | -- |
| Airframe Hours | 10 |
| ELT Installed | No |
| ELT Activated | Unknown |
| ELT Aided Location of Event Site | Unknown |
| ELT Type | -- |
| Aircraft Owner Name | LEONARD R. NOELL |
| Aircraft Owner Street Address | P.O. BOX 939 |
| Aircraft Owner City | TULARE |
| Aircraft Owner State | CA |
| Aircraft Owner Country | |
| Aircraft Owner Zipcode | 93275 |
| 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 | Unknown |
| Indicates Domestic or International Flight | Unknown |
| Operator carrying Pax/Cargo/Mail | Unknown |
| Type of Flying (Per_Bus / Primary) | Unknown |
| Second Pilot on Board | No |
| Departure Point Same as Event | Yes |
| Departure Airport Code | |
| Departure City | |
| Departure State | |
| Departure Country | |
| Departure Time | 0 |
| Departure Time Zone | |
| 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 | Approach |
| Report sent to ICAO? | -- |
| Evacuation occurred | -- |
| Date of most recent change to record | Oct 22 2001 3:26PM |
| User who most recently changed record | dbo |
| Since inspection or accident | -- |
| Event Location Runway Number and Location | 0 |
| Runway Length | -- |
| Runway Width | -- |
| Sight Seeing flight | No |
| Air Medical Flight | No |
| Medical Flight | -- |