Beech C-23 accident near Milwaukee, Wisconsin, June 18, 1986
On June 18, 1986 at about 3:05 am local time, a Beech C-23, registered N66345, was substantially damaged in an accident near Milwaukee, Wisconsin (Lawrence J. Timmerman airport). It was a personal flight under general aviation rules (Part 91). No one was hurt; 4 people were on board or involved. The weather was visual conditions (good weather).
The NTSB's probable cause their words, unchanged
The NTSB has not yet published a probable cause for this accident. Investigations usually take one to two years; this page updates when the final report is released.
Source: NTSB aviation accident database, copy made October 5, 2026. Docket and reports at the NTSB.
What the record shows
- Date
- June 18, 1986 · about 3:05 am local time
- Place
- Milwaukee, Wisconsin · Lawrence J. Timmerman · map
- Type
- Accident
- Injuries
- No one was hurt; 4 people were on board or involved.
- Weather
- visual conditions (good weather)
- Aircraft
- Beech C-23 · all C-23s on the register
- Registration
- N66345 · no longer on the register · serial M-2208
- Damage
- Substantial damage
- Flight
- Personal flight · general aviation rules (Part 91)
The NTSB's narrative final · quoted from the NTSB record
DURING TAXI FOR TAKEOFF THE PLT INADVERTENTLY TAXIED ONTO AN ACCESS ROAD AND STRUCK AND UNLIT SIGN. THE TAXIWAY HAD BEEN RESURFACED AND NO TAXI GUIDE LINES HAD BEEN REPAINTED.
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
- Flight time: 79 hours in all; 6 in this make and model; 20 in the last 90 days; 17 in the last 30 days; 48 as pilot in command
- Medical certificate: Class 2 (valid medical--no waivers/lim.)
- Seat: left
The aircraft
- Airframe total time: 2,213 hours
- Last inspection: annual inspection, May 27, 1986; 49 hours since
- Maximum gross weight: 2,450 lb
- Seats: 4
- Landing gear: fixed
- Engine: Lycoming O-360-A4J (piston); 0 hours total
- Operator: Northstar Aviation
The flight
- Flight plan: none
- Runway 0
Weather at the time
- Light: dusk
- Wind: from 110° at 10 knots
- Visibility: 20 statute miles
- Sky: clear
- Temperature: 63°F (17°C), dew point 0°F (-18°C)
- Altimeter: 30.00 inHg
- Observation at 1:45 am from MWC
Injuries
| Fatal | Serious | Minor | None | |
|---|---|---|---|---|
| Crew | 1 | |||
| Passengers | 3 |
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.