I'm in the middle of my first annual condition inspection with 110hrs on my 320 and have found that nearly everything is working flawlessly at this point.  One issue that I do have is the traditional scraping of the inside of the nose gear door by the gear as it comes out of the well because the door is not getting out of the way fast enough.

I searched through the archives today and got several hits by folks with the same problem and discussion about whether it is better or worse with the second hydraulic line connected to the cylinder as Lancair recommended later on (I have mine connected).  However, I found no solution in the archives.

Have any of you engineered a good solution for this cronic LNC2 problem?  Why do some of us have the problem worse than others?  Any help appreciated.

Thanks!

Dan Olsen

Dan,

 

Although I have the down side of the nose gear door actuator tied to the hydraulic system, it may exacerbate the problem.  With a fresh (strong) nose gear gas spring pushing out the gear at slow air speeds (less drag), the demand for fluid at the down side of the nose gear actuator may actually starve the rest of the system, including main gear initial gravity drop and especially the gear door spring loaded actuators enough to actually draw fluid and stop the nose door from fully opening. 

 

For those that quickly suck up the gear after a cross wind takeoff and don't have the centering mechanism, the gear may hit the door on the way up (that's what the bail is for) because the nose wheel is still slightly cocked. 

 

It is sometimes hard to determine whether the door was hit on the way down, on the way up or both.........

 

My door is painted black with a gray primer underneath.  When enough primer shows, Krylon to the rescue or, sometimes, mascara or a black felt tip pen - whichever is at hand (don't even think it, women are always willing to help with appearances).