Individually Owned: 150,657
Corporate Owned: 137,281
Corona Airport
Aircraft Accident/Incident Report
Corona, California 92880
Saturday, October 13, 2012 12:15 PDT
NTSB Narrative Summary Released at Completion of Accident
After flying for about 1 hour, the pilot prepared the airplane for the landing approach. As he entered the downwind leg of the approach, the engine lost all power. Unable to restart the engine, the pilot performed a forced landing into an adjacent field, where the airplane sustained substantial damage.
A wasp was found in the carburetor fuel bowl, and a wasp head was located wedged within the inner sleeve of the carburetor metering valve. The head was adjacent to the fuel channel hole, blockage of which would have resulted in a loss of fuel flow to the engine and subsequent loss of engine power. Both fuel tank vent ports were also found completely blocked with mud that was likely deposited by the wasp. However, the blocked fuel tank vent ports were unlikely to cause fuel starvation because fuel was present in all the supply lines and the fuel tanks were equipped with venting fuel caps, which were operational.
The only path for a wasp-sized insect to access the carburetor fuel bowl was via the atmospheric bowl vent, the opening of which was located at the carburetor's air inlet. The vent leads directly to the fuel bowl and is wide enough for a wasp to pass through. The wasp most likely accessed the vent through either a hole in the air induction system, a gap in the carburetor-heat door seal, or through the carburetor-heat door opening (assuming the door had not been fully closed on the ground).
It is not known when the wasp entered the fuel system. The airplane’s last annual inspection was performed about 2 1/2 years prior to the accident; however, it is unlikely the wasp would have been discovered during an annual inspection because the carburetor is not an inspection item. The insect would also be difficult to detect during preflight inspection.
NTSB Probable Cause Narrative
Total loss of engine power during the landing approach due to insect debris in the carburetor metering valve, which resulted in fuel starvation.
Event Information
| Type of Event | Accident |
| Event Date | 10/13/2012 |
| Event Day of the Week | Saturday |
| Time of Event | 1215 |
| Event Time Zone | Pacific Daylight Time |
| Event City | Corona |
| Event State | CALIFORNIA |
| Event Country | -- |
| Zipcode of the event site | 92880 |
| Event Date Year | 2012 |
| Event Date Month | 10 |
| MidAir Collision Indicator | No |
| On Ground Collision occurred ? | No |
| Event Location Latitude | 335340n |
| Event Location Longitude | 1173545w |
| Event Location Airport | Corona |
| Event Location Nearest Airport ID | AJO |
| 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 | 533 |
| Weather Briefing Completeness | -- |
| Investigator's weather source | Weather Observation Facility |
| Time of the weather observation | 1156 Pacific Daylight Time |
| Direction of event from weather observation facility (degrees) | -- |
| Weather Observation Facility ID | AJO |
| Elevation of weather observation facility | 533 |
| Distance of event from weather observation facility (units?) | 0 |
| Time Zone of the weather observation | PDT |
| 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) | 22 |
| Dew Point at event time (in degress fahrenheit) | 11 |
| 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) | 30.16 |
| Density Altitude (feet) | -- |
| Intensity of Precipitation | -- |
| METAR weather report | METAR KAJO 131856Z AUTO 10SM CLR 22/11 A3016 RMK A |
| Event Highest Injury | Minor |
| On Ground, Fatal Injuries | -- |
| On Ground, Minor Injuries | -- |
| On Ground, Serious Injuries | -- |
| 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) | 30809 |
| NTSB Notification Source | FAA LAX ROC |
| NTSB Notification Date | -- |
| NTSB Notification Time | -- |
| Fiche Number and/or location -used to find docket information | -- |
| Date of most recent change to record | Jan 22 2013 12:16PM |
| User who most recently changed record | coln |
| Basic weather conditions | Visual Meteorological Cond |
| FAA District Office | -- |
Aircraft Involved |
|
|---|---|
Aircraft #1 |
|
| Aircraft Registration Number | N4309E |
| NTSB Number | WPR13LA009 |
| 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 | PIPER |
| Aircraft Model | PA-38-112 |
| Aircraft Series Identifier | -- |
| Aircraft Serial Number | 38-78A0544 |
| Certified Max Gross Weight | 1670 |
| Aircraft Category | Airplane |
| Aircraft Registration Class | -- |
| 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 | Mar 3 2010 12:00AM |
| Airframe hours since last inspection | 54 |
| Airframe Hours | 2075 |
| ELT Installed | Yes |
| ELT Activated | No |
| ELT Aided Location of Event Site | Unknown |
| ELT Type | C91-A |
| Aircraft Owner Name | STEINMAN ALAN K |
| Aircraft Owner Street Address | -- |
| Aircraft Owner City | CORONA |
| Aircraft Owner State | CA |
| Aircraft Owner Country | USA |
| Aircraft Owner Zipcode | 92882 |
| Operator is an individual? | Yes |
| Operator Name | STEINMAN ALAN K |
| Operator Same as Owner? | Yes |
| Operator Is Doing Business As | -- |
| Operator Address Same as Owner? | Yes |
| Operator Street Address | -- |
| Operator City | CORONA |
| Operator State | CA |
| Operator Country | USA |
| Operator Zip code | 92882 |
| 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 | AJO |
| Departure City | Corona |
| Departure State | CA |
| Departure Country | USA |
| Departure Time | 1115 |
| Departure Time Zone | PDT |
| Destination Same as Local Flt | dest & departure same, accident can occur anywhere |
| Destination Airport Code | AJO |
| Destination City | Corona |
| Destination State | CA |
| Destination Country | USA |
| Specific Phase of Flight | -- |
| Report sent to ICAO? | -- |
| Evacuation occurred | -- |
| Date of most recent change to record | Nov 29 2012 2:45PM |
| User who most recently changed record | coos |
| Since inspection or accident | Time of Accident |
| Event Location Runway Number and Location | 07 |
| Runway Length | 3200 |
| Runway Width | 60 |
| Sight Seeing flight | No |
| Air Medical Flight | No |
| Medical Flight | -- |