ASN Wikibase Occurrence # 70075
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| Date: | Saturday 14 November 2009 |
| Time: | 12:15 |
| Type: |  Sonex Aircraft Sonex |
| Owner/operator: | Private |
| Registration: | N10DA |
| MSN: | 332 |
| Total airframe hrs: | 190 hours |
| Engine model: | Jabiru 3300A |
| Fatalities: | Fatalities: 1 / Occupants: 1 |
| Aircraft damage: | Substantial |
| Category: | Accident |
| Location: | Near the Burnet Municipal Airport (KNMQ), TX -
 United States of America
|
| Phase: | Approach |
| Nature: | Private |
| Departure airport: | Kingsland, TX (44TE) |
| Spicewood, TX | |
| Investigating agency: | NTSB |
| Confidence Rating: |  Accident investigation report completed and information captured |
According to several witnesses, the pilot radioed that he was experiencing a loss of engine power and was attempting a forced landing. Witnesses who saw the airplane reported that during the forced landing attempt the nose of airplane dropped and the airplane subsequently impacted terrain in a nose-low attitude. An examination of the flight controls and airframe structure revealed no preaccident anomalies that would have prevented the pilot from maintaining aircraft control. An examination of the engine and fuel system revealed a white substance inside the main fuel tank which had clogged the fuel screen. Laboratory examination of this substance revealed that it was polyurethane. The sealant used to seal the fuel tank contained polyurethane designed to be used to bond the sealant to a metal tank. The airframe builder added this sealant to the accident airplane's plastic (polyethylene) tank when he encountered a leak within the fuel system at the fuel fitting. An examination of the remaining engine and systems revealed no anomalies.
Probable Cause: The pilot’s failure to maintain aircraft control, resulting in an aerodynamic stall. Contributing to the accident was the loss of engine power due to a clogged fuel screen that resulted in fuel starvation caused by the builder's inappropriate use of a fuel tank sealant in a plastic tank.
Accident investigation:
 |
|
Sources:
NTSB
Location
Revision history:
| Date/time | Contributor | Updates |
|---|---|---|
| 14-Nov-2009 20:40 | RobertMB | Added |
| 06-Dec-2009 04:14 | Alpine Flight | Updated |
| 21-Dec-2016 19:25 | ASN Update Bot | Updated [Time, Damage, Category, Investigating agency] |
| 02-Dec-2017 17:48 | ASN Update Bot | Updated [Operator, Other fatalities, Departure airport, Destination airport, Source, Narrative] |
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