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ON GROUND
When taxiing or holding on the ground at low power in temperatures less than 1°C, engine
operation of 85% LP for one (1) minute is recommended just prior to takeoff and at intervals of
not more than sixty (60) minutes under these temperature and moisture conditions. This is
dependent on taxi/runway conditions and the proximity of other airplanes.
GULFSTREAM AEROSPACE
GIV AIRPLANE FLIGHT MANUAL
SECTION 3
ABNORMAL
PROCEDURES
3-68 FAA APPROVED
31 May 2000
3-11-00: ENGINE STARTING SYSTEM
3-11-10: Engine Failure To Start:
Failure of engine to start or reach idling speed may be caused by:
1. No engine rotation.
2. No fuel or no ignition of fuel.
Failure of the engine to rotate can be the result of electrical or pneumatic malfunctions. Check
engine instrument display for indication of Start Valve Open (SVO). If no indication, see
START VALVE FAILURE procedure, this Section.
NOTE: For airplanes SN 1144 and subs. and SN 1000 thru 1143 with ASC 151, engine failure
to start may be the result of failed igniter. Check EICAS for IGN mnemonic. If not
present, the start may be salvaged by selecting Air Start Ignition - ON prior to moving
the HP cock from OFF to OPEN.
NOTE: Check for fuel flow/pressure to engine. If there is no fuel flow/pressure verify Fire
Handle is FULLY IN.
Auto ignition should occur when the engine start button is pressed, and its availability will be
indicated by the ignition (IGN) mnemonic on the engine instrument display. If auto ignition is
not indicated, check for proper selection of Start instead of Crank. If Crank has inadvertently
been selected, start may be salvaged by selecting proper Air Start Ignition Switch ON; or start
can be terminated, proper selections made, and second attempt initiated.
GULFSTREAM AEROSPACE
GIV AIRPLANE FLIGHT MANUAL
SECTION 3
ABNORMAL
PROCEDURES
FAA APPROVED 3-69
31 May 2000
Fuel ignition should result within five (5) to ten (10) seconds after opening HP fuel cock.
If there is no indication of ignition:
1. HP Fuel Cock...................................................................................................................SHUT
2. Start Master Switch.............................................................................................................OFF
Before attempting another start, perform an engine cranking cycle to expel fuel from the engine.
Ensure high pressure rotor has stopped rotating before engaging starter, and wait minimum of
three (3) minutes between cancellation of start and engagement of starter for crank cycle.
GULFSTREAM AEROSPACE
GIV AIRPLANE FLIGHT MANUAL
SECTION 3
ABNORMAL
PROCEDURES
3-70 FAA APPROVED
11 October 2002
3-11-20: Start Valve Failure:
FAILURE TO OPEN ON ENGINE START
1. Engine Start Circuit Breaker.........................................................................................CHECK
2. APU Air/External Air .................................................................................ON/CONNECTED
3. Bleed Air Pressure ..........................................................................CHECK (25 psi minimum)
4. If air is available and pressure is adequate, attempt another start.
5. If start valve does NOT open, abandon start. The start valve can be manually opened and
closed through an access port in the engine cowling. Refer to QRH or Maintenance Manual,
chapter 80, for procedure.
FAILURE TO CLOSE AFTER ENGINE START
If the start valve indicator ("SVO") is still illuminated (start valve not closed) by ground idle HP
RPM, proceed as follows:
1. Start Master Switch....................................................................PRESS/CHECK LIGHT OUT
2. Both Bleed Air Switches.....................................................................................................OFF
3. APU Air (or External Air) ..................................................................................................OFF
4. When Bleed Air Pressure stabilizes at min. value (min. 30 Sec.) ..... SHUT DOWN ENGINE
5. Notify maintenance before further start attempt.
GULFSTREAM AEROSPACE
GIV AIRPLANE FLIGHT MANUAL
SECTION 3
ABNORMAL
PROCEDURES
FAA APPROVED 3-71
31 May 2000
3-11-30: Start Valve Open (SVO) Indication - Inflight:
In the event the amber SVO indication is displayed on EICAS in-flight:
1. Check all engine parameters and EVM levels.
2. If normal, investigate after landing.
3. If abnormal, shut engine down.
Refer to the Engine Failure, Shutdown In-Flight Checklist, Section 4.
GULFSTREAM AEROSPACE
GIV AIRPLANE FLIGHT MANUAL
SECTION 3
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湾4飞机飞行手册AFM Gulfstream IV AIRPLANE FLIGHT MANUAL 1(67)
