# NTSB SEA84FA088: Cessna 150L, Diamond Lake, OR, April 16, 1984

- Type: NTSB accident investigation
- Classification: Accident · Fatal · Field investigation · Final report
- Date: April 16, 1984, 10:47 local (18:47 UTC)
- Place: Diamond Lake, OR
- Coordinates: 43.150333, -121.799209 (estimated)
- Nearby events: https://openairdocs.org/map.md?lat=43.1503&lon=-121.7992&mi=10
- Phase of flight: [Enroute](https://openairdocs.org/ntsb-phases/400) (OpenAirDocs' grouping)
- Highest injury: Fatal
- Injuries: 2 fatal
- Status: Completed
- Report: Approved by Office Director
- NTSB case key (mKey): 39800
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=SEA84FA088
- NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/39800/pdf
- Page: https://openairdocs.org/ntsb/SEA84FA088

## Sequence of events

In NTSB's coding before 2008 (https://www.ntsb.gov/GILS/Documents/codman.pdf).

- In flight encounter with weather, cruise - normal
  - flight into known adverse weather - initiated, pilot in command (contributing factor)
  - overconfidence in personal ability, pilot in command (contributing factor)
  - weather condition - clouds (contributing factor)
  - weather condition - fog (contributing factor)
  - weather condition - obscuration (contributing factor)
  - vfr flight into imc - continued, pilot in command (cause)
  - lack of total instrument time, pilot in command (contributing factor)
- In flight collision with object, cruise
  - terrain condition - high terrain (contributing factor)
  - object - tree(s) (contributing factor)
- In flight collision with terrain/water, descent - uncontrolled

## Analysis

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.

## Aircraft

- Registration: CGHLW (not matched to a registry record)
- Reported make and model: CESSNA 150L
- Category: Airplane
- Serial number: 15072529
- Engines: CONTINENTAL O-200-A 100 horsepower reciprocating
- Damage: Destroyed
- Flight: Personal, Part 91
- Registered owner: Gregory A. White
- Airworthiness certificate: Standard, Normal
- Last inspection: 100 hour, November 10, 1983, 4,768 hours before
- Departed: LMT, KLAMATH FALLS, OR
- Destination: PDX, PORTLAND, OR
- Flight plan: VFR

## Flight crew

As NTSB recorded them. NTSB leaves out names.

- Pilot; age 26; private; airplane ratings: single-engine land; medical: unknown, valid medical--no waivers/lim.; seat: left; toxicology performed; flight hours: 313 total, 60 in this make and model, 228 as pilot in command, 23 in the last 90 days, 18 in the last 30 days, 3 in the last 24 hours

## Weather

- Conditions: Instrument (IMC), Day

From the NTSB's public API. Aircraft are matched to registry aircraft by N-number and event date, checked against the reported serial number, make and model; the registry's history has gaps, so older matches can be wrong. Compare the reported make and model.

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