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5. DO NOT retract flaps or landing gear until safe climb-out is assured.
GULFSTREAM AEROSPACE
GIV AIRPLANE FLIGHT MANUAL
ADVERSE WEATHER/ABNORMAL
ATMOSPHERIC CONDITIONS
APPENDIX E
E-52 FAA APPROVED
GIV-SP 13 September 2000
THIS PAGE LEFT BLANK INTENTIONALLY
GULFSTREAM AEROSPACE
GIV AIRPLANE FLIGHT MANUAL
ADVERSE WEATHER/ABNORMAL
ATMOSPHERIC CONDITIONS
APPENDIX E
FAA APPROVED E-53
13 September 2000 GIV-SP
ABNORMAL ATMOSPHERIC CONDITIONS
INTRODUCTION
The following are recommendations and procedures for operations in conjunction with flight
through Abnormal Atmospheric Conditions that could, although highly unlikely, cause Dual
Engine Flame-Out. Possible scenarios are:
1. Volcanic Ash Encounter
2. Heavy Rain/Hail Encounter
3. Turbulence Penetration/Severe Gust Encounter
4. Bird Ingestion
5. Lightning Strike
NOTE: The following procedures recommend a glide speed of 300 KCAS not to exceed mach
limitation, down to 25,000 feet in order to attempt a relight. At 25,000 feet a smooth
transition to 210 KCAS should be made to minimize rate of descent.
GULFSTREAM AEROSPACE
GIV AIRPLANE FLIGHT MANUAL
ADVERSE WEATHER/ABNORMAL
ATMOSPHERIC CONDITIONS
APPENDIX E
E-54 FAA APPROVED
GIV-SP 13 September 2000
THIS PAGE LEFT BLANK INTENTIONALLY
GULFSTREAM AEROSPACE
GIV AIRPLANE FLIGHT MANUAL
ADVERSE WEATHER/ABNORMAL
ATMOSPHERIC CONDITIONS
APPENDIX E
FAA APPROVED E-55
11 October 2002 GIV-SP
VOLCANIC ASH ENCOUNTER
Flight through volcanic ash should be avoided. If volcanic ash is encountered, reverse course to
clear the ash cloud and inform ATC. The Autothrottle should be disconnected. A low power
setting is recommended (IDLE is preferred) with Airstart Ignition OFF.
Volcanic ash may be difficult to detect; however, flight crews have reported the following
indications:
1. Smoke and dust with acrid odor, similar to electrical smoke, appearing in cockpit.
2. Engine malfunction, e.g. a surge condition with increasing TGT and flameout.
3. At night, St. Elmo’s fire/static discharge may be seen around the windshield.
4. If static discharge is observed, select Windshield Heat OFF.
If one or both engines flameout, an immediate relight is not recommended until clear of ash
cloud.
If both engines flameout and as RPM is decreasing, perform the following procedures
IMMEDIATELY:
1. Reverse course to clear ash cloud ......................Inform ATC of encounter and course change.
2. Altitude/Airspeed................................................................Descend at VMO/MMO to 25,000 ft.
then slow to 210 KCAS.
NOTE: Use of Speed brakes is not recommended. Use of the Standby Electrical System
(ABEX) Generator is not possible with a windmilling engine.
CAUTION: MANEUVERS SHOULD BE LIMITED TO MINIMUM BANK AND PITCH
ANGLES NECESSARY SINCE HYDRAULIC BOOST WILL BE LOST AS
ENGINE RPM DECAYS.
CAUTION: ENGINE DAMAGE MAY RESULT IF RPM IS NOT ALLOWED TO
STABILIZE AT IDLE BEFORE ADVANCING POWER LEVERS.
Continue descent to the Airstart Envelope and to clear ash cloud.
Refer to Dual Engine Flameout Procedure, EMERGENCY PROCEDURES, Section 4.
GULFSTREAM AEROSPACE
GIV AIRPLANE FLIGHT MANUAL
ADVERSE WEATHER/ABNORMAL
ATMOSPHERIC CONDITIONS
APPENDIX E
E-56 FAA APPROVED
GIV-SP 11 October 2002
HEAVY RAIN/HAIL ENCOUNTER
The Tay engine is tolerant of water ingestion rates normally encountered in flight. During flight
through heavy rain or hail, it is possible that there may be fluctuations in engine parameters, in
particular, a noticeable drop in indicated TGT. If heavy rain or hail is encountered, rapid power
adjustments should be avoided. Airstart Ignition should be ON and Autothrottle OFF. Engine
parameters should return to normal immediately on leaving the area of heavy rain.
Maintaining as high a power setting as possible is recommended. If both engines flameout,
immediate relight is recommended.
As RPM is decreasing, perform the following procedures IMMEDIATELY:
1. Power Levers..................................................................................................................... IDLE
2. Airstart Ignition.................................................................................................................... ON
3. Altitude/Airspeed................................................................Descend at VMO/MMO to 25,000 ft.
then slow to 210 KCAS.
NOTE: Use of Speed brakes is not recommended. Use of the Standby Electrical System
(ABEX) Generator is not possible with a windmilling engine.
CAUTION: MANEUVERS SHOULD BE LIMITED TO MINIMUM BANK AND PITCH
　
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