ORIGINAL: matten
Hi All,
I went flying today and after the first landing starting to taxi back to the pit area my P-80 just stops, on the second flight the same ting happen. later I just taxi the roo few times up and down the runway, wit out any incident.
Does any one has an advice of what may caused it, the hand device showed low rpm -last off condition.
I have 57 flights so far with the p-80.
Regards,
Richard Mattenberger
Hello Richard,
I am no expert Jet Cat person, but I have owned a P-80 for several years now. Three or Four times over the years the very same thing has happen to me. Only while taxing, never while airborne even considering the fact of course at times the throttle has been reduced to idle during approaches momentarily, good thing it never quit then --- but it hasn't......
If you connect your GCU box to the ECU, start your motor go to the screen that allows you to watch RPMs, then throttle up & down a few times. You will notice there is a sag in RPMs below your default setting of 33,000 momentarily. I believe the newest versions of ECU programing has a delay time built in before automatic shutdown occurs if RPMs go below about 28,000 RPM, that the eariler versions of ECU software didn't have. Matt or Bob of course could answer your question better than I. You might try adjusting the idle up to 34,000 see if that changes the bottom end sag RPM's.
Lee H. DeMary
AMA 36099