Cessna 150L accident near Diamond Lake, Oregon, April 16, 1984
On April 16, 1984 at about 6:47 pm local time, a Cessna 150L, registered CGHLW, was destroyed in an accident near Diamond Lake, Oregon. It was a personal flight under general aviation rules (Part 91). 2 people were killed. The weather was instrument conditions (cloud, fog or low visibility).
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
- April 16, 1984 · about 6:47 pm local time
- Place
- Diamond Lake, Oregon · map
- Type
- Accident
- Injuries
- 2 people were killed.
- Weather
- instrument conditions (cloud, fog or low visibility)
- Aircraft
- Cessna 150L · all 150Ls on the register
- Registration
- CGHLW · no longer on the register · serial 15072529
- Damage
- Destroyed
- Flight
- Personal flight · general aviation rules (Part 91)
The NTSB's narrative final · quoted from the NTSB record
THE ACFT WAS ON A FLT FROM SACRAMENTO, CA TO VANCOUVER, BRITISH COLUMBIA, VIA RED BLUFF, KLAMMATH FALLS, EUGENE, PORTLAND & SEATTLE. DURING A WX BRIEFING AT 0545 PST, THE NON-INSTRUMENT RATED PLT WAS ADVISED THAT VFR FLT WAS NOT RECOMMENDED. HOWEVER, HE FILED A VFR FLT PLAN & PROCEEDED ON THE TRIP. WHEN HE FILED A FLT PLAN FROM KLAMMATH FALLS TO EUGENE, HE INDICATED THAT HE WOULD BE CRUISING AT 11,500 FT. SUBSEQUENTLY, THE ACFT CRASHED INTO WOODED TERRAIN AT AN ELEVATION OF ABOUT 5650 FT. THE ACFT CAME TO REST IN A NOSE DOWN ATTITUDE & PARTIALLY BURIED IN SNOW. AN EXAM OF THE ACFT REVEALED NO PREIMPACT PART FAILURE OR MALFUNCTION. THERE WAS EVIDENCE THAT THE ENG WAS PROVIDING POWER DURING IMPACT. PERSONNEL LOCATED ABOUT 4 MI NORTH OF THE ACCIDENT SITE REPORTED THE VISIBILITY WAS EXTREMELY LOW WITH FOG.
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: 313 hours in all; 60 in this make and model; 23 in the last 90 days; 18 in the last 30 days; 228 as pilot in command
- Medical certificate: Unknown (valid medical--no waivers/lim.)
- Seat: left
The aircraft
- Last inspection: 100-hour inspection, November 10, 1983; 4,768 hours since
- Maximum gross weight: 1,600 lb
- Seats: 2
- Landing gear: fixed
- Engine: Continental O-200-A (piston); 0 hours total
The flight
- Departed from: LMT Klamath Falls OR at 5:58 pm
- Destination: PDX Portland OR
- Flight plan: VFR
- Runway 0
Weather at the time
- Light: daylight
- Sky: not recorded
- Temperature: 0°F (-18°C), dew point 0°F (-18°C)
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.