Cessna U206G accident near Lebanon, Maine, October 18, 2007
On October 18, 2007 at about 5:40 pm local time, a Cessna U206G, registered N8777Q, was substantially damaged in an accident near Lebanon, Maine. It was a personal flight under general aviation rules (Part 91). No one was hurt; 1 person was on board or involved. The weather was visual conditions (good weather).
The NTSB's probable cause their words, unchanged
Failure of the crankshaft resulting in the total loss of engine power.
Source: NTSB aviation accident database, copy made October 5, 2026. Docket and reports at the NTSB.
What the record shows
- Date
- October 18, 2007 · about 5:40 pm local time
- Place
- Lebanon, Maine · map
- Type
- Accident
- Injuries
- No one was hurt; 1 person was on board or involved.
- Weather
- visual conditions (good weather)
- Aircraft
- Cessna U206G · all U206Gs on the register
- Registration
- N8777Q · registry record · serial U20603529
- Damage
- Substantial damage
- Flight
- Personal flight · general aviation rules (Part 91)
The NTSB's narrative final · quoted from the NTSB record
While en route to his destination the private pilot began experiencing a rough running engine with a subsequent total loss of engine power. Unable to make the nearest airfield the pilot elected to land in a farm field. During landing roll the nosewheel contacted a burrow resulting in the separation of the nosewheel assembly and a loss of control. The airplane came to rest in the upright position and the pilot was able to egress without assistance. During the engine examination a sub-surface fatigue fracture was discovered on the number 5 crankshaft cheek resulting in the failure of the crankshaft and loss of engine power. The engine was last overhauled approximately 17 years prior to the accident. The engine manufacturer stated that the engine should be overhauled every 12 years. On January 23, 1998, the Federal Aviation Administration released guidance for the replacement of the crankshaft at the next overhaul or the next time the crankshaft was removed. At the time of the accident, compliance with the service bulletin and airworthiness was not accomplished, nor required.
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
Pilot
- Certificate: private
- Ratings: single-engine land; instrument: airplane
- Flight time: 247 hours in all; 157 in this make and model; 28 in the last 90 days; 14 in the last 30 days; 169 as pilot in command
- Last flight review: August 1, 2007
- Medical certificate: Class 3 (with waivers/limitations)
- Seat: left
- Injury: no injuries
The aircraft
- Airframe total time: 2,532.3 hours
- Last inspection: annual inspection, April 1, 2007
- Maximum gross weight: 3,600 lb
- Seats: 6
- Landing gear: fixed
- Engine: Teledyne Continental IO-520-F (piston); 0 hours total
The flight
- Departed from: 4B6 Ticoderoga NY at 4:35 pm
- Destination: SFM Sanford ME
- Flight plan: IFR
Weather at the time
- Light: daylight
- Wind: from 200° at 4 knots
- Visibility: 10 statute miles
- Sky: clear
- Temperature: 70°F (21°C), dew point 52°F (11°C)
- Altimeter: 29.94 inHg
- Observation at 5:51 pm from SFM, 8 miles away
Injuries
| Fatal | Serious | Minor | None | |
|---|---|---|---|---|
| Crew | 1 |
Documents from the investigation the NTSB's docket: the evidence folder behind the report
The docket, the folder of records gathered during an investigation (maintenance records, photographs, witness statements, examinations), has not been read from the NTSB for this case yet; the list appears here once it has. Open the docket at the NTSB.
Everything on this page comes from the NTSB's public records. The narrative, probable cause and findings are the NTSB's own words; the coded tables behind the report are written out in plain English, with pilots' ages, home towns and medical details left out. The documents and photographs are the NTSB's docket, shown as the NTSB released them. This site's own text never names anyone involved. A preliminary report can change; the final report usually follows one to two years later, and the page is refreshed when it does.