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Here's a puzzler for those who are already flying 320/360's.
It concerns the hydraulic system (!@#$%^&*).
Master Switch On.. pressure OK
Start up...pressure OK
Taxi ...pressure OK
Takeoff....Retract....pressure OK
Flying....pressure OK
Return to airport...lower gear....(Down and locked)
PUMP Recyles every 3 secs,
for approx. 30 secs.
Pump stops.
Land....pressure OK
Taxi back to hangar...pressure OK
Hmmmmmm.......Only after a flight, on the Low Pressure side.
The consensus opinion leans towards an air bubble somewhere in this
"...self bleeding" hydraulic system.  I loosened the fitting at the Low
Pressure
switch, and re-tightened it.  Went up again....the pump only came on 3
times (!)
then stopped.  Lesson:  The hydraulic switches are the 'high points' of the system.  Air
bubbles
would NOT be able to migrate back to the reservoir if they got to the
switches.
Jim Solensky
p.s. I've already had to rebuild both retract cylinders in less than 100
hrs. That's
probably how the bubble got in the system.