Gerard,

 

According to a friend here building an older LNC2, Van Hecke is no longer at Oildyne and his replacements are not very familiar with the pump history for the Lancair pump upgrades. 

 

I have never had the issues spoken of on the LML, so can't help you there.  I sent my 1987 pump to them in 1998 or 1999 for their "latest and greatest" upgrades as they called them which included some valve changes.  Cost then was about $120 including shipping with a turn around time of about 2 weeks.

 

Gary Edwards

LNC2 N21SN

Medford, Oregon

 

>>>Over a year ago I had problems with a nose gear door fully open in flight, the symptom of which was an aerodynamic " buzzing " noise from the front of the aircraft. It was suggested that perhaps I had the reversed spool valve problem. I pulled the pump apart and found no spool valve inside. I cannabalised my old pump and installed a spool valve in the new pump. The problem was solved.

Unfortunately I am again getting an buzzing noise/vibration (only worse) above 130kts, which I suspect is a nose gear door partially ajar in flight. I thought it may be the exhaust vibrating, however this was tightened and the noise persists.

 I wonder would the valve which had been present in the old pump for over 10 years have finally deteriorated or started to deteriorate?

So what symptoms have people had in old pumps?

Also the contact I pulled from the archives for Oildyne was Edward Van Hecke..is he still "the man"

Gerard O Connell
Melbourne, Australia
VH-LPD (LNC2)