Individually Owned: 150,657
Corporate Owned: 137,281
Mariposa-Yosemite Airport
Aircraft Accident/Incident Report
Mariposa, California 95338
Tuesady, February 21, 2012 14:40 PST
NTSB Narrative Summary Released at Completion of Accident
The pilot was returning to the airport when he noticed the smell of smoke in the cockpit. The smoke intensity increased, and after about 15 seconds, he opted to perform a forced landing into a pasture. During the landing roll, the nosewheel separated from the airplane, which slid to a stop. The pilot stated that after egressing, he observed fire emanating from underneath the engine area.
A postaccident examination revealed that the engine’s predominant area of thermal deformation was around the No. 4 cylinder (right side). Examination of the bottom of the engine revealed that the right side exhibited hotter thermal exposure signatures than the rest of the engine. Due to the thermal destruction, it could not be determined precisely where the fire originated; however, the area where the damage was the greatest was where the fuel lines, coolant lines, ignition harness, and carburetor were located. It was also noted that no heat shielding was installed between the exhaust system and the engine, which more than likely had an effect on the initiation of the fire.
Both the engine and the exhaust manufacturers recommended installing heat shielding between the exhaust and engine components. The limits section of the Installation Manual states that if there is not proper heat shielding to protect the modules and fuel lines from the exhaust heat, the engine may be susceptible to a fire. However, because this airplane is experimental, there is no requirement for the installation of the heat shield.
NTSB Probable Cause Narrative
Improper clearance and inadequate heat shielding between engine components and the exhaust system, which resulted in an in-flight fire.
Event Information
| Type of Event | Accident |
| Event Date | 2/21/2012 |
| Event Day of the Week | Tuesday |
| Time of Event | 1440 |
| Event Time Zone | Pacific Standard Time |
| Event City | Mariposa |
| Event State | CALIFORNIA |
| Event Country | -- |
| Zipcode of the event site | 95338 |
| Event Date Year | 2012 |
| Event Date Month | 2 |
| MidAir Collision Indicator | No |
| On Ground Collision occurred ? | No |
| Event Location Latitude | 372259N |
| Event Location Longitude | 1195930W |
| Event Location Airport | Mariposa-Yosemite Airport |
| Event Location Nearest Airport ID | MPI |
| Indicates whether the acc/inc occurred off or on an airport | Off Airport/Airstrip |
| Distance from airport in statute miles | 6 |
| Degrees magnetic from airport | -- |
| Airport Elevation | 2254 |
| Weather Briefing Completeness | -- |
| Investigator's weather source | Pilot |
| Time of the weather observation | 1300 Pacific Standard Time |
| Direction of event from weather observation facility (degrees) | -- |
| Weather Observation Facility ID | -- |
| Elevation of weather observation facility | -- |
| Distance of event from weather observation facility (units?) | -- |
| Time Zone of the weather observation | PST |
| 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) | 19 |
| Dew Point at event time (in degress fahrenheit) | -- |
| Wind Direction (degrees magnetic) | -- |
| Variable Wind Indicator | Variable |
| Wind Speed (knots) | -- |
| Wind Velocity Indicator | Light and Variable |
| Wind Gust Indicator | Not Gusting |
| Wind Gust (knots) | -- |
| Altimeter Setting at event time (in. Hg) | 30.06 |
| Density Altitude (feet) | -- |
| 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 | 2 |
| Injury Total Serious | -- |
| Injury Total All | -- |
| Investigating Agency | NTSB |
| NTSB Docket Number (internal use) | 30905 |
| NTSB Notification Source | FAA WP Operations Center |
| NTSB Notification Date | -- |
| NTSB Notification Time | -- |
| Fiche Number and/or location -used to find docket information | -- |
| Date of most recent change to record | Feb 26 2013 9:52AM |
| User who most recently changed record | johb |
| Basic weather conditions | Visual Meteorological Cond |
| FAA District Office | -- |
Aircraft Involved |
|
|---|---|
Aircraft #1 |
|
| Aircraft Registration Number | N72PD |
| NTSB Number | WPR12LA113 |
| Missing Aircraft Indicator | -- |
| Federal Aviation Reg. Part | Part 91: General Aviation |
| Type of Flight Plan filed | None |
| Flight plan Was Activated? | -- |
| Damage | Substantial |
| Aircraft Fire | In-flight |
| Aircraft Explosion | None |
| Aircraft Manufacturer's Full Name | HAYCRAFT |
| Aircraft Model | SPORT HORNET |
| Aircraft Series Identifier | -- |
| Aircraft Serial Number | 055 |
| Certified Max Gross Weight | 1250 |
| Aircraft Category | Airplane |
| Aircraft Registration Class | -- |
| Aircraft is a homebuilt? | Yes |
| Flight Crew Seats | 1 |
| Cabin Crew Seats | -- |
| Passenger Seats | 1 |
| Total number of seats on the aircraft | 2 |
| Number of Engines | 1 |
| Fixed gear or retractable gear | Fixed |
| Aircraft, Type of Last Inspection | Conditional |
| Date of Last Inspection | Aug 7 2011 12:00AM |
| Airframe hours since last inspection | 10 |
| Airframe Hours | 97 |
| ELT Installed | Yes |
| ELT Activated | No |
| ELT Aided Location of Event Site | No |
| ELT Type | -- |
| Aircraft Owner Name | OLIVER HAYCRAFT |
| Aircraft Owner Street Address | -- |
| Aircraft Owner City | GLENDALE |
| Aircraft Owner State | CA |
| Aircraft Owner Country | USA |
| Aircraft Owner Zipcode | 91202-1814 |
| Operator is an individual? | Yes |
| Operator Name | OLIVER HAYCRAFT |
| Operator Same as Owner? | Yes |
| Operator Is Doing Business As | -- |
| Operator Address Same as Owner? | Yes |
| Operator Street Address | -- |
| Operator City | GLENDALE |
| Operator State | CA |
| Operator Country | USA |
| Operator Zip code | 91202-1814 |
| 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) | Personal |
| Second Pilot on Board | No |
| Departure Point Same as Event | Yes |
| Departure Airport Code | MPI |
| Departure City | Mariposa |
| Departure State | CA |
| Departure Country | USA |
| Departure Time | 1340 |
| Departure Time Zone | PST |
| Destination Same as Local Flt | dest & departure same, accident can occur anywhere |
| Destination Airport Code | MPI |
| Destination City | Mariposa |
| Destination State | CA |
| Destination Country | USA |
| Specific Phase of Flight | -- |
| Report sent to ICAO? | -- |
| Evacuation occurred | -- |
| Date of most recent change to record | Jan 4 2013 5:29PM |
| User who most recently changed record | coos |
| Since inspection or accident | Time of Accident |
| Event Location Runway Number and Location | N/A |
| Runway Length | -- |
| Runway Width | -- |
| Sight Seeing flight | No |
| Air Medical Flight | No |
| Medical Flight | -- |