Individually Owned: 150,657
Corporate Owned: 137,281
Aircraft Accident/Incident Report
Colona, Illinois 61241
Monday, June 25, 2007 8:10 CDT
NTSB Narrative Summary Released at Completion of Accident
The airplane impacted terrain following a descent in a right turn through instrument meteorological conditions. The left and right seated airplane occupants were both non-instrument rated private pilots. An examination of the wreckage revealed no pre-impact anomalies which would have precluded normal airplane operations. The left seat pilot was at high risk for obstructive sleep apnea (OSA), which is strongly associated with obesity and high blood pressure requiring multiple medications. Obstructive sleep apnea, if present and untreated, results in significant impairment and increased accident risk. The actual presence or possible role of possible OSA in this accident could not be conclusively determined, though such a disorder could have adversely affected the left seat pilot’s decision-making regarding initiating or continuing flight into deteriorating visibility and/or his responses to such conditions once he encountered them. The left seat pilot did not have a current medical certificate.
NTSB Probable Cause Narrative
The non-instrument rated pilot's continued flight into instrument meteorological conditions.
Event Information
| Type of Event | Accident |
| Event Date | 6/25/2007 |
| Event Day of the Week | Monday |
| Time of Event | 810 |
| Event Time Zone | Central Daylight Time |
| Event City | Colona |
| Event State | ILLINOIS |
| Event Country | -- |
| Zipcode of the event site | 61241 |
| Event Date Year | 2007 |
| Event Date Month | 6 |
| MidAir Collision Indicator | No |
| On Ground Collision occurred ? | No |
| Event Location Latitude | 412932N |
| Event Location Longitude | 0902103W |
| Event Location Airport | -- |
| Event Location Nearest Airport ID | -- |
| Indicates whether the acc/inc occurred off or on an airport | Off Airport/Airstrip |
| Distance from airport in statute miles | -- |
| Degrees magnetic from airport | -- |
| Airport Elevation | -- |
| Weather Briefing Completeness | -- |
| Investigator's weather source | Weather Observation Facility |
| Time of the weather observation | 752 Central Daylight Time |
| Direction of event from weather observation facility (degrees) | 253 |
| Weather Observation Facility ID | MLI |
| Elevation of weather observation facility | 590 |
| Distance of event from weather observation facility (units?) | 9 |
| Time Zone of the weather observation | CDT |
| Lighting Conditions | Day |
| Lowest Ceiling Height | 100 |
| Lowest Non-Ceiling Height | -- |
| Sky/Lowest/Cloud Conditions | -- |
| Sky Condition for Lowest Ceiling | Overcast |
| Visibility Runway Visual Range (Feet) | -- |
| Visibility Runway Visual Value (Statute Miles) | -- |
| Visibility (Statute Miles) | 0.5 |
| Air Temperature at event time (in degrees celsius) | 21 |
| Dew Point at event time (in degress fahrenheit) | 19 |
| Wind Direction (degrees magnetic) | -- |
| Variable Wind Indicator | -- |
| Wind Speed (knots) | -- |
| Wind Velocity Indicator | Calm |
| Wind Gust Indicator | Not Gusting |
| Wind Gust (knots) | -- |
| Altimeter Setting at event time (in. Hg) | 30.07 |
| Density Altitude (feet) | -- |
| Intensity of Precipitation | -- |
| METAR weather report | KMLI 251252Z 00000KT 1/2SM R09/1800V2400FT FG OVC0 |
| Event Highest Injury | Fatal |
| On Ground, Fatal Injuries | -- |
| On Ground, Minor Injuries | -- |
| On Ground, Serious Injuries | -- |
| Injury Total Fatal | 2 |
| Injury Total Minor | -- |
| Injury Total None | -- |
| Injury Total Serious | -- |
| Injury Total All | 2 |
| Investigating Agency | NTSB |
| NTSB Docket Number (internal use) | 23444 |
| NTSB Notification Source | |
| NTSB Notification Date | Jun 25 2007 12:00AM |
| NTSB Notification Time | -- |
| Fiche Number and/or location -used to find docket information | DMS |
| Date of most recent change to record | Apr 30 2008 1:28PM |
| User who most recently changed record | NTSB\johb |
| Basic weather conditions | Instrument Meteorological Cond |
| FAA District Office | DuPage, IL, FSDO |
Aircraft Involved |
|
|---|---|
Aircraft #1 |
|
| Aircraft Registration Number | N8804H |
| NTSB Number | CHI07FA182 |
| Missing Aircraft Indicator | -- |
| Federal Aviation Reg. Part | Part 91: General Aviation |
| Type of Flight Plan filed | None |
| Flight plan Was Activated? | No |
| Damage | Destroyed |
| Aircraft Fire | None |
| Aircraft Explosion | None |
| Aircraft Manufacturer's Full Name | North American |
| Aircraft Model | Navion |
| Aircraft Series Identifier | -- |
| Aircraft Serial Number | NAV-4-804 |
| Certified Max Gross Weight | 2750 |
| 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 | 4 |
| Number of Engines | 1 |
| Fixed gear or retractable gear | Retractable |
| Aircraft, Type of Last Inspection | -- |
| Date of Last Inspection | -- |
| Airframe hours since last inspection | -- |
| Airframe Hours | -- |
| ELT Installed | Yes |
| ELT Activated | -- |
| ELT Aided Location of Event Site | No |
| ELT Type | -- |
| Aircraft Owner Name | John A. Horn |
| Aircraft Owner Street Address | -- |
| Aircraft Owner City | Cedar Falls |
| Aircraft Owner State | IA |
| Aircraft Owner Country | USA |
| Aircraft Owner Zipcode | 50613 |
| Operator is an individual? | No |
| Operator Name | -- |
| Operator Same as Owner? | Yes |
| Operator Is Doing Business As | -- |
| Operator Address Same as Owner? | Yes |
| Operator Street Address | -- |
| Operator City | -- |
| Operator State | -- |
| Operator Country | -- |
| Operator Zip code | -- |
| Operator Code | -- |
| Owner has at least one certificate | None |
| Other Operator of large aircraft? | -- |
| 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 | No |
| Departure Airport Code | ALO |
| Departure City | WATERLOO |
| Departure State | IA |
| Departure Country | USA |
| Departure Time | -- |
| Departure Time Zone | CDT |
| Destination Same as Local Flt | -- |
| Destination Airport Code | 27K |
| Destination City | GEORGETOWN |
| Destination State | KY |
| Destination Country | USA |
| Specific Phase of Flight | Cruise |
| Report sent to ICAO? | -- |
| Evacuation occurred | -- |
| Date of most recent change to record | Apr 14 2008 9:13AM |
| User who most recently changed record | BOWL |
| Since inspection or accident | -- |
| Event Location Runway Number and Location | NA |
| Runway Length | -- |
| Runway Width | -- |
| Sight Seeing flight | No |
| Air Medical Flight | No |
| Medical Flight | -- |