20030811028749I

(-23) The CFI was giving instruction to a private pilot when on third takeoff they did not get a gear up anc lock light. The gear pump motor circuit breaker was popped. The private pilot pushed the circuit breaker in and the amber light illuminated. On the following landing the aircraft veered off the side of the runway into soft dirt. The landing gear pump circuit breaker was popped and the main gear partially collapsed. The aircraft was not damaged. During incident investigation the ground marks indicate that the gear was extended but only the nose gear stayed down and locked. The aircraft was flown back to lincoln, NE, where it was put on jacks and the gear swing test was satisfactory. Approximately 25 hours later during a 100 hour inspection there was problems when the gear was checked. The pressure switch would not release until 2000 PSI. Maintenance adjusted the pressure switch and replaced the circuit breaker. On 9/23/03 at Kansas city int'l airport the pilot put the gear down, saw the gear extend, and had a green light, but on short final noticed the gear unsafe indication. The pilot executed a go around, recycled the gear and landed without incident. The aircraft was ferried to lincoln, NE.