Rockwell 690B accident near Baker City, Oregon, June 25, 2008
On June 25, 2008 at about 11:00 pm local time, a Rockwell 690B, registered N9KG, was substantially damaged in an accident during landing (landing roll) near Baker City, Oregon (Baker City 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).
The NTSB's probable cause their words, unchanged
The landing gear collapse during the landing roll due to the fracture of the inboard hydraulic cylinder clevis pin housing boss for undetermined reasons.
Source: NTSB aviation accident database, copy made October 5, 2026. Docket and reports at the NTSB.
What the record shows
- Date
- June 25, 2008 · about 11:00 pm local time
- Place
- Baker City, Oregon · Baker City Municipal Airport · map
- Type
- Accident
- Injuries
- No one was hurt; 1 person was on board or involved.
- Weather
- visual conditions (good weather)
- Aircraft
- Rockwell 690B
- Registration
- N9KG · registry record · serial 11426
- Damage
- Substantial damage
- Flight
- Personal flight · general aviation rules (Part 91)
The NTSB's narrative final · quoted from the NTSB record
The airplane sustained substantial damage following a right main landing gear collapse on its first landing after a 150-hour maintenance inspection. The collapse was due to a fracture and separation of the right main landing gear's housing boss from the inboard hydraulic cylinder clevis. The 150-hour inspection included the installation of a new clevis on the right main landing gear's inboard hydraulic actuator. A postaccident examination by a Federal Aviation Administration inspector revealed that the inboard hydraulic rod bearing attach bolt was screwed all the way in, which was contrary to instructions specified in the maintenance manual. While the manual states that the attach bolt should be backed off three complete turns in order to maintain proper rigging, the manufacturer reported that improper preload adjustment of the right main landing gear actuator cylinder could not create a large enough force to induce the failure of the right main landing gear outer body boss and clevis fitting. A metallurgical examination of the inboard hydraulic cylinder clevis and associated clevis pin housing boss showed that the housing boss had fractured from the main body of the strut and that the fracture was consistent with overstress. There was no evidence of wear or fatigue cracking on either the clevis or the housing boss. The postaccident examination of the airplane, the landing gear system, and its associated components failed to reveal the initiating event that subsequently resulted in the overstress failure and landing gear collapse.
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
What happened, in order
- Sys/Comp malf/fail (non-power) during landing (landing roll)
- Landing gear collapse during landing (landing roll) defining event
The NTSB's findings
- cause Aircraft › Aircraft systems › Landing gear system › Gear extension and retract sys › Failure
Pilot
- Certificate: commercial pilot
- Ratings: multi-engine land; single-engine land; instructor: airplane multi-engine; instructor: airplane single-engine; instructor: instrument airplane; instrument: airplane
- Flight time: 5,565 hours in all; 165 in this make and model; 68 in the last 90 days; 27 in the last 30 days
- Last flight review: September 25, 2007
- Medical certificate: Class 2 (without waivers/limitations)
- Seat: left
- Injury: no injuries
The aircraft
- Airframe total time: 5,509 hours
- Last inspection: annual inspection, June 24, 2008; 1 hours since
- Maximum gross weight: 10,325 lb
- Seats: 7
- Landing gear: retractable
- Engine 1: Garrett TPE-331-10T (turboprop); 0 hours total
- Engine 2: Garrett TPE-331-10T (turboprop); 0 hours total
The flight
- Departed from: HIO Hillsboro OR at 10:00 pm
- Destination: BKE Baker City OR
- Flight plan: IFR
- Runway 31, 5,095 ft by 100 ft
Weather at the time
- Light: daylight
- Wind: from 340° at 7 knots
- Visibility: 10 statute miles
- Sky: clear
- Temperature: 75°F (24°C), dew point 43°F (6°C)
- Altimeter: 30.07 inHg
- Observation at 11:53 pm from BKE
Injuries
| Fatal | Serious | Minor | None | |
|---|---|---|---|---|
| Flight 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.