Cessna 337 accident near Broomfield, Colorado, May 6, 1990
On May 6, 1990 at about 1:31 am local time, a Cessna 337, registered N2208X, was substantially damaged in an accident near Broomfield, Colorado (Jefferson County airport). It was a personal flight under general aviation rules (Part 91). No one was hurt; 2 people were on board or involved. The weather was visual conditions (good weather).
The NTSB's probable cause their words, unchanged
THE PILOT'S FAILURE TO PROPERLY EXECUTE A PRECAUTIONARY APPROACH FOLLOWING AN ENGINE FAILURE.
Source: NTSB aviation accident database, copy made October 5, 2026. Docket and reports at the NTSB.
What the record shows
- Date
- May 6, 1990 · about 1:31 am local time
- Place
- Broomfield, Colorado · Jefferson County · map
- Type
- Accident
- Injuries
- No one was hurt; 2 people were on board or involved.
- Weather
- visual conditions (good weather)
- Aircraft
- Cessna 337 · all 337s on the register
- Registration
- N2208X · no longer on the register · serial 337-0108
- Damage
- Substantial damage
- Flight
- Personal flight · general aviation rules (Part 91)
The NTSB's narrative final · quoted from the NTSB record
WHILE CONDUCTING A TEST FLT FOLLOWING OVERHAUL OF BOTH ENGINES THE REAR ENGINE FAILED WHILE ON DOWNWIND LEG. THE PLT SECURED THE ENGINE AND ATTEMPTED TO FEATHER THE PROP. THE PROP WOULD NOT FEATHER. THE PLT OVERFLEW AN AVAILABLE RUNWAY WHILE CONDUCTING A PRECAUTIONARY APPROACH AND OVERSHOT THE RUNWAY OF INTENDED LANDING. THE ACFT LANDED IN A RUNUP AREA ADJACENT TO THE RUNWAY IN A HIGH RATE OF DESCENT AND CAME TO REST IN A GRASS AREA BETWEEN THE RUNWAY AND TAXIWAY. THE ACFT SUSTAINED SUBSTANTIAL DAMAGE AND THE PLT AND PAX WERE NOT INJURED. THE ENGINE FAILED DUE TO THE OIL DILUTION LINE BEING CONNECTED TO THE PRESSURE PORT ON THE OIL PUMP INSTEAD OF THE VACUUM PORT, AND MAINTENANCE INSTRUCTIONS DO NOT PROVIDE GUIDANCE FOR THE INSTALLATION.
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: multi-engine land; single-engine land
- Flight time: 485 hours in all; 180 in this make and model; 485 as pilot in command
- Medical certificate: Class 3 (valid medical--no waivers/lim.)
- Seat: left
The aircraft
- Airframe total time: 1,749 hours
- Last inspection: annual inspection, May 1, 1990
- Maximum gross weight: 4,300 lb
- Seats: 6
- Landing gear: retractable
- Engine: Continental IO-360-CD (piston); 0 hours total
- Operator: Out And About Aviation
The flight
- Departed from: BJC at 1:25 am
- Flight plan: none
- Runway 29R, 9,000 ft by 100 ft
Weather at the time
- Light: daylight
- Wind: from 010° at 6 knots
- Visibility: 50 statute miles
- Sky: clear
- Temperature: 52°F (11°C), dew point 30°F (-1°C)
- Altimeter: 30.00 inHg
- Observation at 1:39 am from BJC, 1 miles away
Injuries
| Fatal | Serious | Minor | None | |
|---|---|---|---|---|
| Crew | 1 | |||
| Passengers | 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.