Cessna 150L accident near Upper Marlboro, Maryland, May 30, 1986
On May 30, 1986 at about 10:20 am local time, a Cessna 150L, registered N11463, was substantially damaged in an accident near Upper Marlboro, Maryland. It was a personal flight under general aviation rules (Part 91). 1 person had minor injuries. 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
- May 30, 1986 · about 10:20 am local time
- Place
- Upper Marlboro, Maryland · map
- Type
- Accident
- Injuries
- 1 person had minor injuries.
- Weather
- visual conditions (good weather)
- Aircraft
- Cessna 150L · all 150Ls on the register
- Registration
- N11463 · no longer on the register · serial 15075441
- Damage
- Substantial damage
- Flight
- Personal flight · general aviation rules (Part 91)
The NTSB's narrative final · quoted from the NTSB record
THE ACFT MADE A FORCED LANDING AFTER THE ENG BEGAN TO OVERHEAT DURING CRUISE FLT ABOUT 20 MINUTES AFTER DEPARTURE. THE PLT STATED THAT AS SOON AS HE SMELLED THE OIL HEATING UP HE KNEW WHAT THE PROBLEM WAS. HE HAD NOT REMOVED THE FOAM PLUGS FROM THE AIR INTAKES DURING HIS PREFLT. THESE PLUGS ARE USED BY SOME PLTS TO PREVENT BIRDS FROM NESTING IN THE AREA BEHIND THE PROP HUB. DURING THE FORCED LNDG THE NOSE GEAR WAS DAMAGED IN A FURROW AND THE ACFT NOSED OVER.
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; single-engine sea
- Flight time: 208 hours in all; 191 in this make and model; 15 in the last 90 days; 79 as pilot in command
- Medical certificate: Class 3 (valid medical--w/ waivers/lim.)
- Seat: left
The aircraft
- Airframe total time: 3,921 hours
- Last inspection: annual inspection, May 18, 1985
- Maximum gross weight: 1,000 lb
- Seats: 2
- Landing gear: fixed
- Engine: Continental O-200 (piston); 0 hours total
The flight
- Departed from: W18 Laural MD at 10:00 am
- Destination: PHF Newport News VA
- Flight plan: none
- Runway 0
Weather at the time
- Light: daylight
- Visibility: 10 statute miles
- Sky: clear
- Temperature: 64°F (18°C), dew point 0°F (-18°C)
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.