Incident Summary
After takeoff, the pilot noted a malfunction of the landing gear system. Attempts were made to lower the gear, but the nose gear would not extend. All attempts to extend the nose gear were unsuccessful, so the pilot elected to make a wheels-up landing. After landing, an examination was conducted.
Examination Findings
The examination revealed that the nose gear was cocked and jammed in the wheel well. A bolt, part number AN343H3A (P/N 1243617-1), had sheared, which allowed the nose gear to jam.
Background
The pilot reported that the nose gear bearing had recently failed and that the aircraft had run off the runway and onto rough terrain. After the wheel bearing was repaired, the aircraft made three takeoffs and two landings before the nose gear jammed on this flight.