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Accidents · NTSB CEN11LA618 · Final report

Amateur-built Waiex accident near Marion, Illinois, September 2, 2011

On September 2, 2011 at about 2:28 pm local time, a amateur-built Waiex, registered N100VY, was substantially damaged in an accident during initial climb near Marion, Illinois (Williamson County Regional airport). It was a flight test 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

The partial loss of engine power during initial climb for undetermined reasons.

Source: NTSB aviation accident database, copy made November 2, 2026. Docket and reports at the NTSB.

What the record shows

Date
September 2, 2011 · about 2:28 pm local time · cases in 2011
Place
Marion, Illinois · Williamson County Regional · cases near this airport · map
Type
Accident
Injuries
No one was hurt; 1 person was on board or involved.
Weather
visual conditions (good weather)
Aircraft
Amateur-built Waiex
Registration
N100VY · registry record · serial W0100
Damage
Substantial damage
Flight
Flight test · general aviation rules (Part 91)

The NTSB's narrative final · quoted from the NTSB record

The accident occurred during initial flight testing of the experimental amateur-built airplane. The pilot reported that there were no anomalies with the engine during a before-takeoff engine check or when he applied power for takeoff. He stated that shortly after liftoff he perceived that the engine was not producing maximum takeoff power and that the engine tachometer was indicating several hundred rpm lower than expected. Since there was insufficient runway remaining to land safely, he elected to land on the airport's crossing runway. The left wingtip collided with terrain as he maneuvered the airplane toward the crossing runway. A postaccident examination of the airplane did not reveal any mechanical malfunctions or failures that would have precluded normal operation of the airplane. Additionally, the accident engine demonstrated the ability to produce rated horsepower during a postaccident operational test run. Although the potential for serious carburetor icing existed while operating at glide power, the postaccident investigation was unable to conclusively determine if carburetor icing had contributed to the partial loss of engine power.

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

  1. Loss of engine power (partial) during initial climb defining event
  2. Off-field or emergency landing during landing
  3. Dragged wing/rotor/float/other during landing

The NTSB's findings

  • cause Aircraft › Aircraft power plant › Engine (reciprocating) › (general) › Malfunction other cases naming the engine
  • cause Not determined › Not determined › (general) › (general) › Unknown/Not determined

Pilot

  • Certificate: private
  • Ratings: single-engine land; instrument: airplane
  • Flight time: 615 hours in all; 5 in this make and model; 5 in the last 90 days; 5 in the last 30 days; 448 as pilot in command; 0 on instruments
  • Last flight review: April 10, 2010
  • Medical certificate: Sport Pilot
  • Seat: left
  • Injury: no injuries

The aircraft

  • Airframe total time: 5 hours
  • Last inspection: condition inspection, June 20, 2011
  • Maximum gross weight: 1,250 lb
  • Seats: 2
  • Landing gear: fixed
  • Engine: Jabiru 3300-A (piston); 0 hours total

The flight

  • Departed from: KMWA Marion IL at 2:28 pm
  • Destination: KMWA Marion IL
  • Flight plan: none
  • Runway 20, 8,002 ft by 150 ft

Weather at the time

  • Light: daylight
  • Wind: from 190° at 6 knots
  • Visibility: 15 statute miles
  • Sky: clear
  • Temperature: 88°F (31°C), dew point 64°F (18°C)
  • Altimeter: 30.04 inHg
  • Observation at 2:32 pm from KMWA

Injuries

FatalSeriousMinorNone
Flight crew1

Documents from the investigation the NTSB's docket: the evidence folder behind the report

7 documents, released by the NTSB on February 8, 2012. View them here, or download them; the NTSB redacts some personal details before release, and this site shows the NTSB's own titles rather than its file names.

The same docket at the NTSB · documents without a copy here are fetched from the NTSB when you open them.

Connections how this case links to the rest of the register

Aircraft
Place

The whole map of how records connect · these connections as data: /graph/accident/CEN11LA618.json.

The bigger picture in Aviation Analytics: accidents over time since 1982, by model, by phase of flight and conditions, by place and on the map.

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 does not name anyone involved, its policy at this time. A preliminary report can change; the final report usually follows one to two years later, and the page is refreshed when it does.