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IF “CB” INDICATION CLEARS:
A. Normal Operation.....................................................................CONTINUE
B. Crew Advisory System ..............................................................MONITOR
IF MESSAGE REPEATS:
C. Inoperative Fuel Boost Pump .............................................SWITCH OFF
D. Inoperative Fuel Boost Pump Circuit Breaker (PDB) .....VERIFY OPEN
Fuel Boost Pump Circuit Breakers:
• L MAIN BOOST PUMP: PDB, DC ESS Section
• R MAIN BOOST PUMP: PDB, DC ESS Section
• L ALT BOOST PUMP: PDB, RIGHT DC Section
• R ALT BOOST PUMP: PDB, RIGHT DC Section
05-16-30: Failure Of Two Fuel Boost Pumps On One Side
IF TWO (2) FUEL BOOST PUMPS ON THE SAME SIDE ARE INOPERATIVE, FUEL
CAN BE DELIVERED UNDER PRESSURE TO EACH ENGINE BY:
1. Crossflow (X FLOW)....................................................................................OPEN
CAUTION
THE ENGINE WILL RUN ON SUCTION FUEL FEED
ONLY AT OR BELOW 20,000 FEET. ABOVE 20,000
FEET, THE ENGINE WILL RUN ERRATICALLY AND
FLAME OUT IF THE CROSSFLOW VALVE IS NOT
OPEN WITH AT LEAST ONE BOOST PUMP ON.
OPERATING MANUAL
EXPANDED ABNORMAL / EMERGENCY PROCEDURES 05-16-00
Page 5
October 11/02
Revision 8
2. Operative Fuel Boost Pumps..........................................................................ON
NOTE:
Flying under these conditions will produce a gradually
increasing fuel unbalance, since fuel from one tank will
be used. Fuel quantity on the side with the inoperative
fuel boost pumps will increase due to the ejector, while
fuel quantity on the side with the operative fuel boost
pumps will decrease. Fuel balancing is accomplished
by selecting INTERTANK OPEN and establishing a
small sideslip (½ trapezoid or ball) in the appropriate
direction. When fuel balancing is completed, select
INTERTANK CLOSED and reestablish normal trim.
OPERATING MANUAL
05-16-00 EXPANDED ABNORMAL / EMERGENCY PROCEDURES
Page 6
October 11/02
Revision 8
HYDRAULIC SYSTEM
05-17-10: Dual Hydraulic System Failure
CHECK HYD QUANTITY (AMBER)
CMB HYD FAIL (AMBER)
FLT HYD FAIL (AMBER)
1. Altitude .....................................................DESCEND TO 25,000 FT OR BELOW
2. Airspeed ......................................................MAINTAIN 250 KCAS OR SLOWER
3. Yaw Damper.....................................................................................SELECT OFF
NOTE:
This action disengages the autopilot, if engaged at the
time.
FOR APPROACH AND LANDING:
4. Approach.......................PLAN WIDE, POWER-ON APPROACH AT 20° FLAPS
A. Landing Runway........SELECT LONGEST AVAILABLE WITH MINIMUM
CROSSWIND COMPONENT
5. FLAP Handle .....................................................................................................20°
NOTE:
Set flaps to 20° using Auxiliary Hydraulic (AUX) pump
pressure.
6. Gear Handle.................................................................................SELECT DOWN
7. Airspeed .............................................................................175 KCAS MAXIMUM
8. Gear .......................................................EXTEND USING ALTERNATE SYSTEM
9. Gear Position.............................................................CHECK DOWN / 3 GREEN
10. Flaps ....................................................................................................VERIFY 20°
11. GPWS / GND SPLR FLAP ORIDE ...................................................................ON
12. AUX Pump ..........................................................ON (PRIOR TO TOUCHDOWN)
NOTE:
The red GND SPOILER warning message may be
displayed on CAS during flap position. This is due to
“spoiler float” and is considered normal.
NOTE:
Nose wheel steering will not be available for landing.
FINAL LANDING CONFIGURATION IS GEAR DOWN, GEAR HANDLE DOWN,
FLAPS 20°, AUX PUMP ON.
ON TOUCHDOWN:
13. Directional Control.MAINTAIN AS REQUIRED WITH BRAKES AND RUDDER
Expect diminished braking capability due to the low output of the AUX pump and
the demand of the brakes.
OPERATING MANUAL
EXPANDED ABNORMAL / EMERGENCY PROCEDURES 05-17-00
Page 1
October 11/02
Revision 8
05-17-20: Utility Hydraulic Pump
With the UTILITY PUMP - OFF/ARM switch depressed and the UTILITY PUMP - ON
switch extended, the utility hydraulic pump will automatically operate if Combined
Hydraulic System pressure should drop below 800 psi.
NOTE:
In the event that the above conditions exist and, with
the utility pump operating, there is NO resultant Utility
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湾流4操作手册 Gulfstream IV Operating Manual 3(108)
