Piper PA-18-150 accident near Concrete, Washington, April 11, 2008
On April 11, 2008 at about 10:15 pm local time, a Piper PA-18-150, registered N6845Z, was substantially damaged in an accident during maneuvering (low-alt flying) near Concrete, Washington. It was a personal flight under general aviation rules (Part 91). 1 person had minor injuries. The weather was visual conditions (good weather).
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The NTSB's probable cause their words, unchanged
A loss of engine power for undetermined reasons.
Source: NTSB aviation accident database, copy made October 4, 2026. Docket and reports at the NTSB.
What the record shows
- Date
- April 11, 2008 · about 10:15 pm local time
- Place
- Concrete, Washington · map
- Type
- Accident
- Injuries
- 1 person had minor injuries.
- Weather
- visual conditions (good weather)
- Aircraft
- Piper PA-18-150 · all PA-18-150s on the register
- Registration
- N6845Z · registry record · serial 18-8132
- Damage
- Substantial damage
- Flight
- Personal flight · general aviation rules (Part 91)
The NTSB's narrative final · quoted from the NTSB record
After performing a series of takeoffs and landings, the pilot landed and spent 30 to 45 minutes on the ground before taking off for the accident flight. The pilot reported that during the flight, he flew low and slow, and the engine experienced a power failure. Thereafter, the airplane impacted a river and nosed over in 4 feet of water. The engine, including the carburetor, was examined. The engine was torn down, and no evidence of a preimpact anomaly was observed. The carburetor was bench tested and performed within the manufacturer's specifications.
The complete narrative as the NTSB published it. The NTSB's docket holds the report as a PDF and any photographs, statements and other documents from the investigation.
The factual record from the NTSB's investigation tables, in plain English
What happened, in order
- Loss of engine power (total) during maneuvering (low-alt flying) defining event
The NTSB's findings
- cause Aircraft › Aircraft power plant › Engine (reciprocating) › (general) › Not specified
- Environmental issues › Physical environment › Terrain › Water › Contributed to outcome
- cause Not determined › Not determined › (general) › (general) › Unknown/Not determined
Pilot
- Certificate: private
- Ratings: single-engine land; single-engine sea
- Flight time: 790 hours in all; 200 in this make and model; 29 in the last 90 days; 8 in the last 30 days; 690 as pilot in command
- Last flight review: June 6, 2007
- Medical certificate: Class 3 (with waivers/limitations)
- Seat: frt
- Injury: minor injuries
The aircraft
- Airframe total time: 4,339 hours
- Last inspection: annual inspection, October 18, 2007
- Maximum gross weight: 1,760 lb
- Seats: 2
- Landing gear: fixed
- Engine: Lycoming O-320 (piston); 0 hours total
The flight
- Departed from: 3W5 Concrete WA at 10:00 pm
- Destination: AWO Arlington WA
- Flight plan: none
Weather at the time
- Light: daylight
- Visibility: 10 statute miles
- Sky: clear
- Temperature: 50°F (10°C), dew point 0°F (-18°C)
Injuries
| Fatal | Serious | Minor | None | |
|---|---|---|---|---|
| Flig | 1 |
Other NTSB records under N6845Z the same tail number, which may have belonged to a different aircraft at the time
About this page
Everything above comes from the NTSB's public accident database: the narrative, probable cause and findings are the NTSB's own words, and the coded tables behind its report (pilot, aircraft, flight, weather, injuries, sequence of events) are written out in plain English. Pilots' ages, home towns and medical details are left out on purpose. The docket at the NTSB holds the report as a PDF and the investigation's photographs and documents. This site never names pilots, passengers or anyone else involved. A preliminary report describes what is known soon after the event and can change; the final report, with the probable cause, usually follows one to two years later and this page is refreshed when it does. Case number LAX08LA099.