Cessna 421 accident near Okmulgee, Oklahoma, July 13, 1989
On July 13, 1989 at about 4:15 pm local time, a Cessna 421, registered N699PC, was substantially damaged in an accident near Okmulgee, Oklahoma (Okmulgee Mun. airport). It was an other work-use flight under general aviation rules (Part 91). 1 person was seriously injured. The weather was visual conditions (good weather).
The NTSB's probable cause their words, unchanged
FAILURE OF THE NOSE GEAR EXTENSION ASSEMBLY AND THE PILOT'S IMPROPER PRECAUTIONARY LANDING PROCEDURES THAT INCLUDED SECURING THE ENGINES PRIOR TO A POINT WHERE A SAFE LANDING WAS ASSURED.
Source: NTSB aviation accident database, copy made October 5, 2026. Docket and reports at the NTSB.
What the record shows
- Date
- July 13, 1989 · about 4:15 pm local time
- Place
- Okmulgee, Oklahoma · Okmulgee Mun.
- Type
- Accident
- Injuries
- 1 person was seriously injured.
- Weather
- visual conditions (good weather)
- Aircraft
- Cessna 421 · all 421s on the register
- Registration
- N699PC · no longer on the register · serial 421-150
- Damage
- Substantial damage
- Flight
- Other work-use flight · general aviation rules (Part 91)
The factual record from the NTSB's investigation tables, in plain English
Pilot
- Certificate: airline transport pilot
- Ratings: multi-engine land; single-engine land; instructor: airplane multi-engine; instructor: airplane single-engine; instructor: instrument airplane; instrument: airplane
- Flight time: 5,470 hours in all; 894 in this make and model; 5,301 as pilot in command; 3,031 on instruments
- Medical certificate: Class 1
- Seat: left
The aircraft
- Airframe total time: 4,322 hours
- Last inspection: annual inspection, June 22, 1989; 30 hours since
- Maximum gross weight: 6,850 lb
- Seats: 6
- Landing gear: retractable
- Engine: Continental GTSIO-520-D (piston); 0 hours total
The flight
- Departed from: 0F8 Sand Springs OK at 2:30 pm
- Flight plan: none
- Runway 0
Weather at the time
- Light: daylight
- Visibility: 3 statute miles
- Sky: broken clouds at 2,000 ft; not recorded
- Temperature: 84°F (29°C), dew point 0°F (-18°C)
- Altimeter: 29.00 inHg
Injuries
| Fatal | Serious | Minor | None | |
|---|---|---|---|---|
| Crew | 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.