Originally Posted by Mustafagander
Boeing like to have gear hydraulics depressurised in flight hence the "OFF" position for the gear selector. This removes pressure from the gear system and allows the gears on most Boeing jets to hang on the up locks provided for the purpose. It makes sense to remove 3000psi whenever possible. If it's not pressurised, it can't leak.
True. However, there is at least one 747-400 airline which flies with the gear lever in the UP position. Apparently, at this airline, repeat rigging problems has seen a number of gears drop onto (closed) doors with the lever in the OFF position.
I guess, rather than train their maintenance personnel properly, they chose to modify the operational procedures (The expensive of maintaining hydraulic systems under constant pressure is apparently less than repairing damaged doors?)
Rgds.
NSEU