Saab 340B, Operation Manual, Page: 514 / 670

HYDRAULICS
Operation
Aircraft Operations Manual
10.2
PAGE 2
Apr 01/15
2. NORMAL OPERATION
CONDITIONS NORMAL PROCEDURES
2.1 OPERATION OF
HYDRAULIC
SYSTEM Before engine start
1. HYDR PUMP switch AUTO . . . . . . . . . . . . . . . . . . . . . . . . . . . .
− Check HYD PUMP switch to be in AUTO and guarded position.
The pump will start when L MAIN BUS is powered. (Ground power ON or gener-
ator supplying power).
NOTE
After engine start
2. Hydraulic gauges CHECK . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
− Check pressures and quantity to be within green arc.
During approach
3. Hydraulic pressure CHECK . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
− Check all four hydraulic pressure indicators to be within green arc.
Hydraulic quantity will vary during normal operation of the hydraulic subsystems.
Typical variations from the nominal values are (approx values):
− EXT./Retr. of landing gear: +/ − 25 cu. in
− Ext./Retr. of flaps (landing): +/ − 13 cu. in
− System depressurized (on ground): + 90 cu. in
NOTE