Cessna 185F accident near Delta Junction, Alaska, September 15, 1999
On September 15, 1999, a Cessna 185F, registered N85LC, was substantially damaged in an accident near Delta Junction, Alaska (Rockstad'S Airstrip airport). It was a flight of an unrecorded kind under charter and air-taxi rules (Part 135). 2 people had minor injuries; 1 other was unhurt. The weather was visual conditions (good weather).
The NTSB's probable cause their words, unchanged
Corrosion and a fatigue failure of the lower end of the landing gear strut. Factors in the accident were the manufacturer's and the FAA's insufficient standards/requirements for life limits and inspection procedures.
Source: NTSB aviation accident database, copy made October 5, 2026. Docket and reports at the NTSB.
What the record shows
- Date
- September 15, 1999
- Place
- Delta Junction, Alaska · Rockstad'S Airstrip · map
- Type
- Accident
- Injuries
- 2 people had minor injuries; 1 other was unhurt.
- Weather
- visual conditions (good weather)
- Aircraft
- Cessna 185F · all 185Fs on the register
- Registration
- N85LC · registry record · serial 18502643
- Damage
- Substantial damage
- Flight
- Flight of an unrecorded kind · charter and air-taxi rules (Part 135)
The NTSB's narrative final · quoted from the NTSB record
The airline transport certificated pilot was landing a tailwheel equipped airplane on an airstrip near a remote cabin on an on-demand air taxi flight. The airstrip had been used by the pilot in the past. Near the end of the landing roll, the left main landing gear strut fractured above the left wheel axle. The wheel and the lower end of the gear strut separated from the airplane. The upper portion of the gear strut dug into the ground, and the airplane nosed over. The airplane received damage to the right wing, propeller, the vertical stabilizer, and the rudder. The lower end of the gear strut has four holes drilled through the metal to facilitate the installation of the wheel axle and brake assembly. An examination of the landing gear strut found areas of cracking, typical of fatigue, emanating from the inboard edge of the forward, upper bolt hole. One crack developed in an area of two small corrosion pits in the drilled hole. A second crack developed in an area of the fillet between the drilled hole, and the inboard surface of the strut. The cracks from the two areas combined to form one crack laterally across the strut and through the aft, upper bolt hole. The interior surfaces of the forward, upper bolt hole and fillet regions were pitted, consistent with the effects of corrosion. Neither the manufacturer nor the FAA, have established a life limit (hours or cycles) for the main landing gear strut. An annual inspection does not require disassembly of the axle from the gear strut. No inspection procedures, other than a general visual inspection of the landing gear, have been specified by the manufacturer, or the FAA.
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: airline transport pilot, flight instructor, commercial pilot
- Ratings: multi-engine land; single-engine land; single-engine sea; instructor: airplane single-engine; instrument: airplane
- Flight time: 26,728 hours in all; 9,320 in this make and model; 304 in the last 90 days; 156 in the last 30 days; 26,000 as pilot in command
- Medical certificate: Class 2 (valid medical--no waivers/lim.)
- Seat: left
The aircraft
- Airframe total time: 5,892 hours
- Last inspection: annual inspection, September 3, 1999; 30 hours since
- Maximum gross weight: 3,350 lb
- Seats: 6
- Landing gear: fixed
- Engine: Continental IO-520-D (piston); 0 hours total
- Operator: Tamarack Air LTD.
The flight
- Departed from: PAFA Fairbanks AK at 6:50 pm
- Runway 6, 1,200 ft by 10 ft
Weather at the time
- Light: daylight
- Wind: from 060° at 10 knots
- Visibility: 50 statute miles
- Sky: clear
- Temperature: 55°F (13°C), dew point 0°F (-18°C)
Injuries
| Fatal | Serious | Minor | None | |
|---|---|---|---|---|
| Crew | 1 | |||
| Passengers | 1 | 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.