MartySantic
Well Known Member
I have been troubleshooting a fuel pressure issue and a potential fuel pump problem. I would like to pass the following with regard to the LOW FUEL PRESSURE alarm point entered by Van's in the D-180.
In the locked settings file, Van's changed the low fuel pressure alarm point to 0.7 psig in I believe firmware version 5.3. Previous to this change the alarm point value was 2.1 or 2.2 psig.
In my opinion, a value of 0.7 psig is a BAD choice. First, if the engine driven fuel pump starts to falter, you will NOT receive a low fuel pressure alarm. The electric fuel pump which is always running will develop at least 1.0 psig. Second, fuel pressure is not indicated on the main screen. As such, the pilot would never know there is a fuel pressure issue.
I have changed the low fuel pressure alarm point to 2.2 psig in the D-180. Have sent this item to Van's to rethink the logic here.
In the locked settings file, Van's changed the low fuel pressure alarm point to 0.7 psig in I believe firmware version 5.3. Previous to this change the alarm point value was 2.1 or 2.2 psig.
In my opinion, a value of 0.7 psig is a BAD choice. First, if the engine driven fuel pump starts to falter, you will NOT receive a low fuel pressure alarm. The electric fuel pump which is always running will develop at least 1.0 psig. Second, fuel pressure is not indicated on the main screen. As such, the pilot would never know there is a fuel pressure issue.
I have changed the low fuel pressure alarm point to 2.2 psig in the D-180. Have sent this item to Van's to rethink the logic here.