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inverter to AC power. Thus, airplane DC load is displayed on standby AC load
monitor and airplane AC load is displayed on the standby DC load monitor.
When operating on the standby system, electrical load (both AC and DC )
should be reduced to less than 100% on the standby monitor panel to avoid
excessive use of battery power.
All essential AC and DC Bus powered equipment is available when
using Standby Electrical Power System. Among the items available:
Pilot’s PFD Standby Engine Instruments
DU 3 (SG 2 and 3 - ALT) Standby Warning Panel
COMM No. 1 (or No. 3, as bused) Standby Fuel Qty Indicator
NAV No. 1 and DME No. 1 Wing / Cowl Anti-ice
ADF No. 1 Pressurization
ATC No. 1 (Transponder) Cockpit / Cabin Temp Control
(SN 1120 & subs. and airplanes with ASC 170)
Display Controller No. 1 Main Fuel Boost Pumps
FMS No. 1 and IRS No. 1 Cross Flow Valve
Both DBDIs Intertank Valve
Both Clocks Tone Generator
ISDU (or 3rd Nav Unit) Pilot’s and Standby Pitot Heat
DADC No. 1 Air Start Ignition
FGC-1 (Turn Knob Inop) Fire Detection / Protection
Flight Director Both FWCs (FWC 1 only: SPZ 8000 airplanes)
Pitch Trim AOA No. 1
Yaw Damper Aux Hydraulic Pump
All Bus Controllers Flaps and Flap / Stab Indicator
Left Windshield Wiper
Upon descent for approach and landing, replace Standby
Electrical Power with APU/Auxiliary Power, when altitude permits,
as follows:
NOTE: Normal Hydraulic Landing Gear operation and landing with the
Standby Electrical Power system as a source of electrical power is
approved as long as the Auto Ground Spoilers and Thrust Reversers
are NOT used. See Landing With Standby Electrical Power System
Operating, page EF-6.
11. Descend to 15,000 ft. or lower; slow to a maximum speed of 250
KCAS.
NOTE: To ensure sufficient battery strength, it is recommended that
descent to 15,000 ft. and start of the APU be accomplished within ten
(10) minutes, if the Standby Electrical Power system cannot be used
during the descent.
Continued on next page →
Quick Reference Handbook
REVISION 7 ABNORMAL / EMERGENCY PROCEDURES
May 30/02 Page EA - 5
Alternator / Converter Failure - Dual, ctd… AFM 4-07-10
12. APU Fire Warning ...............................................................CHECK
13. APU Master ................................................................................ON
14. APU Oil Press Light....................................................................ON
15. APU Start Button ....................................................................PUSH
CAUTION: A MAXIMUM OF TWO (2) THIRTY (30) SECOND APU
START ATTEMPTS WILL ENSURE TWENTY (20) MINUTES OF
BATTERY-ONLY OPERATION. ADDITIONAL START ATTEMPTS WILL
REDUCE BATTERY-ONLY OPERATING TIME. IF UNABLE TO START
APU AND STANDBY ELECTRICAL POWER SYSTEM IS NOT
AVAILABLE, SEE ELECTRICAL SYSTEM - BATTERY ONLY
OPERATION, PAGE EA-7.
CAUTION: IF APU CANNOT BE STARTED OR APU ALTERNATOR
CANNOT BE USED TO POWER THE BUSES, REMAIN ON STANDBY
ELECTRICAL POWER THROUGHOUT DESCENT AND APPROACH.
DO NOT CONTINUE CHECKLIST. AT CREW’S DISCRETION, THE
LANDING MAY BE ACCOMPLISHED BY TURNING OFF STANDBY
ELECTRICAL POWER AND USING BATTERY POWER ONLY FOR
LANDING OR THE CREW MAY ELECT TO LAND WITH STANDBY
ELECTRICAL POWER OPERATING.
16. Auxiliary Power ...........................................................................ON
17. Essential AC Bus AUTO Switch .............................................PUSH
18. Standby Electrical Power E-INVERT Switch ............................ OFF
19. Essential DC Bus AUTO Switch.............................................PUSH
20. Standby Electrical Power TRU Switch...................................... OFF
21. EPMP Auxiliary AC and DC Percent Loads ........................CHECK
22. Fuel Boost Pumps (Both MAINS)...............................................ON
23. Crossflow...........................................................................CLOSED
24. Standby Electrical Power Switch .............................................. OFF
NOTE: If the 100% load limit is exceeded on the APU alternator
(AUX PWR on the EPMP) or on the transformer-rectifier (AUX PWR
on EPMP), turn off equipment as required to bring loads within limits.
See the appropriate APU procedure in this section.
25. Utility Pump ..................................................ARM / AS REQUIRED
END
Quick Reference Handbook
ABNORMAL / EMERGENCY PROCEDURES REVISION 7
Page EA - 6 May 30/02
Essential DC Bus Power Failure AFM 4-07-20
1. Essential DC Bus Power Source............................................ BATT
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湾流4快速检查单QRH GULFSTREAM IV QUICK REFERENCE HANDBOOK 3(5)
