Beech C23 accident near Lakeview, Oregon, August 21, 1993
On August 21, 1993 at about 4:25 pm local time, a Beech C23, registered N6547R, was substantially damaged in an accident near Lakeview, Oregon. 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
A FRACTURED EXHAUST VALVE. THE ROUGH TERRAIN WAS A FACTOR.
Source: NTSB aviation accident database, copy made October 5, 2026. Docket and reports at the NTSB.
What the record shows
- Date
- August 21, 1993 · about 4:25 pm local time
- Place
- Lakeview, Oregon · map
- Type
- Accident
- Injuries
- No one was hurt; 2 people were on board or involved.
- Weather
- visual conditions (good weather)
- Aircraft
- Beech C23 · all C23s on the register
- Registration
- N6547R · no longer on the register · serial M1588
- Damage
- Substantial damage
- Flight
- Personal flight · general aviation rules (Part 91)
The NTSB's narrative final · quoted from the NTSB record
DURING A CROSS COUNTRY FLIGHT, WHILE IN CRUISE FLIGHT, THE ENGINE SUDDENLY BEGAN TO RUN ROUGH. THE RPM DROPPED AND THE AIRPLANE WAS UNABLE TO MAINTAIN ALTITUDE. THE PILOT INITIATED A FORCED LANDING TO AN OPEN FIELD WHERE DURING THE LANDING ROLL, THE AIRPLANE COLLIDED WITH THE ROUGH TERRAIN. DURING THE POST CRASH ENGINE INSPECTION, IT WAS FOUND THAT THE NUMBER ONE EXHAUST VALVE HEAD BROKE AWAY AT THE NECK.
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: 199 hours in all; 20 in this make and model; 6 in the last 90 days; 4 in the last 30 days; 144 as pilot in command
- Medical certificate: Class 2 (valid medical--no waivers/lim.)
- Seat: left
The aircraft
- Airframe total time: 2,148 hours
- Last inspection: annual inspection, April 14, 1993; 14 hours since
- Maximum gross weight: 2,450 lb
- Seats: 4
- Landing gear: fixed
- Engine: Lycoming O-360-A4J (piston); 0 hours total
The flight
- Departed from: LMT Klamath Falls OR at 3:40 pm
- Destination: BOI Boise ID
- Flight plan: VFR
- Runway 0
Weather at the time
- Light: daylight
- Wind: from 180° at 3 knots
- Visibility: 10 statute miles
- Sky: broken clouds at 2,100 ft; scat at 1,300 ft
- Temperature: 55°F (13°C), dew point 48°F (9°C)
- Altimeter: 30.00 inHg
- Observation at 3:15 pm from LKV, 28 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.