(x)  
Operate ground test bench and slowly increase hydraulic pressure.

(y)  
On airplanes with 10-60552-1 pressure switch installed, check that STANDBY HYD low pressure light extinguishes between 950 and 1450 psi.

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BOEING PROPRIETARY - Copyright . - Unpublished Work - See title page for details.

(z)  
On airplanes with 10-60552-11 or -22 pressure switch installed, check that STANDBY HYD low pressure light extinguishes between 1100 and 1500 psi. (aa) On airplanes with 10-60552-35 pressure switch installed, check that STANDBY HYD

low-pressure light extinguishes between 1300 and 1600-psi. (bb) Slowly decrease pressure.

(cc)
On airplanes with 10-60552-1 pressure switch installed, check that master caution light and STANDBY HYD low pressure light illuminates between 1350 and 700 psi. (dd) On airplanes 10-60552-11 or -22 pressure switch installed, check that master caution and STANDBY HYD low pressure lights illuminate between 1400 and 1000 psi. (ee) On airplanes with 10-60552-35 pressure switch installed, check that STANDBY HYD low pressure and master caution lights illuminate between 1500 and 1200 psi. (ff) Turn off ground test bench and disconnect pressure hose connected to ground test

bench in step (w). (gg) Reconnect pressure hose to pressure port of pump. (hh) Place ALT FLAP arming switch to OFF and secure with lockwire.

(ii)  
Remove electrical power/hydraulic power if no longer required.

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