I was at Raytheon turning wrenches on King-Airs and getting my instrument ticket on the weekends. We had a very tricky problem on a C-90, the landing gear was acting up, and usually Beechcraft landing gear is pretty solid, but anyway we replaced the hydraulic power-pac and cycled the gear MANY times on the ground, every time three down and locked!!!

So the time came for the test flight and I jumped at the chance to ride along with the pilot that usually flies the aircraft. So we took off IFR from Houston Hobby and I flew to Victoria at FL240 then we headed back. Landing checklist almost finished when we got only two lights!! The nose and right main decided to lock but the left main was AWOL. So we called Go-Round and notified tower then we started a pumpin' and that light would not come on!!!! The tower vectored us for a tower fly-by two times and each time they saw nothing out of the ordinary, but we couldnt give up that easy. They put us out by the Missouri city towers and we flew around for over an hour and we pumped over two hours, so the pilot made the decision to declare an emergency and we headed for the field. The plan was simple I would pump the emergency handle just until touchdown in hopes that it would lock and then he would put it down onthe right main hold it off till it dropped and then brace for impact.

So were on final for 35 and im pumpin and suddenly as we slowed to about 120kts the dang light came on!!!!!!!!!!!!

We found later that the new power-pac was actually bypassing through the emergency extention lines!!!

Train like its for REAL and it will be much easier to do your job.