Cessna 150B accident near Lamar, Missouri, August 21, 1998
On August 21, 1998 at about 8:45 pm local time, a Cessna 150B, registered N1239Y, was substantially damaged in an accident near Lamar, Missouri (Lamar Municipal Airport). It was a personal flight under general aviation rules (Part 91). No one was hurt; 1 person was on board or involved. The weather was visual conditions (good weather).
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The NTSB's probable cause their words, unchanged
inadequate lubrication of the torque plate holes and torque pins by the mechanic who performed the airplane's last annual inspection.
Source: NTSB aviation accident database, copy made October 4, 2026. Docket and reports at the NTSB.
What the record shows
- Date
- August 21, 1998 · about 8:45 pm local time
- Place
- Lamar, Missouri · Lamar Municipal Airport · map
- Type
- Accident
- Injuries
- No one was hurt; 1 person was on board or involved.
- Weather
- visual conditions (good weather)
- Aircraft
- Cessna 150B · all 150Bs on the register
- Registration
- N1239Y · registry record · serial 15059639
- Damage
- Substantial damage
- Flight
- Personal flight · general aviation rules (Part 91)
The NTSB's narrative final · quoted from the NTSB record
The pilot said her landing in the tail wheel airplane was uneventful. During the landing roll, the airplane suddenly veered to the left while in a 3-point attitude. The pilot said right rudder did not stop the turn and the airplane ran off the runway edge and into a 4-foot deep ditch. The on-site investigation revealed that the left main landing gear's brake torque plate holes and torque pins were dry. The wheel would not rotate. According to the pilot, she had never experienced dragging brakes while flying the airplane.
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
- Medical certificate: Class 3
- Seat: left
The aircraft
- Airframe total time: 3,508 hours
- Last inspection: annual inspection, July 1, 1998; 13 hours since
- Maximum gross weight: 1,500 lb
- Seats: 2
- Landing gear: fixed
- Engine: Continental O-200-A (piston); 0 hours total
- Not recorded
The flight
- Departed from: PTS Pittsburg KS
- Destination: LLU
- Flight plan: none
- Runway 21, 2,905 ft by 40 ft
Weather at the time
- Light: not reported
- Wind: from 050° at 8 knots
- Visibility: 10 statute miles
- Sky: clear
- Temperature: 90°F (32°C), dew point 0°F (-18°C)
- Altimeter: 30.00 inHg
- Observation at 8:55 pm from JLN
Injuries
| Fatal | Serious | Minor | None | |
|---|---|---|---|---|
| Crew | 1 |
About this page
Everything above comes from the NTSB's public accident database: the narrative, probable cause and findings are the NTSB's own words, and the coded tables behind its report (pilot, aircraft, flight, weather, injuries, sequence of events) are written out in plain English. Pilots' ages, home towns and medical details are left out on purpose. The docket at the NTSB holds the report as a PDF and the investigation's photographs and documents. This site never names pilots, passengers or anyone else involved. A preliminary report describes what is known soon after the event and can change; the final report, with the probable cause, usually follows one to two years later and this page is refreshed when it does. Case number CHI98LA326.