Low fuel pressure
After 200 hours service, 912 uls with 400 hours.
On first flight, after about 2 hours of flight.
Suddenly 0 fuel pressure on cruise.
After adding electric pump no change and having coughs.
Down rpm to 4000 and the pressure goes a bit up to the minimum of range.
Mechanical pump has 4 years aged (new model).
New fuel pipes.
What is the reason?
Thanks,
Gil.