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RETRACTION FOLLOWING ALTERNATE EXTENSION
WARNING: A FULLY CHARGED NITROGEN BOTTLE (3000 PSI AT 70°F (21°C)
ALLOWS ONLY ONE EXTENSION OF THE LANDING GEAR.
RETRACTION FOLLOWING ALTERNATE EXTENSION COULD
RESULT IN A GEAR UP LANDING.
CAUTION: THIS RESET/RETRACTION PROCEDURE IS PROVIDED FOR USE IF
GREATER OR COMPOUNDED EMERGENCY CONDITIONS EXIST AND IS
NOT TO BE CONSIDERED AUTHORIZATION TO RECYCLE LANDING
GEAR AFTER ROUTINE MAINTENANCE OR TRAINING USE OF THE
BLOW DOWN SYSTEM.
Extension of the landing gear using the preceding procedures actuates valves to isolate the
Hydraulic System from the nitrogen pressure of the Emergency Extension system. Should
conditions necessitate landing gear retraction, the system must be reset to the normal
configuration. Retraction will not be possible if Combined System fluid was lost.
To retract the landing gear following an alternate extension, proceed as follows:
1. Landing Gear Handle.....................................................................................................DOWN
2. Emergency Landing Gear T-Handle ...................................................................PUSH (Down)
Wait minimum of thirty (30) seconds after re-seating T-handle to allow pressure to bleed off.
3. Dump Valve D-Ring........................................................................................................ PULL
NOTE: Handle must be pulled up fully, held for ten (10) seconds, then restowed.
4. Landing Gear Handle............................................................................................................UP
NOTE: There is no back up method for retracting landing gear.
GULFSTREAM AEROSPACE
GIV AIRPLANE FLIGHT MANUAL
SECTION 3
ABNORMAL
PROCEDURES
3-98 FAA APPROVED
31 May 2000
3-19-30: Nosewheel Steering Failure:
If the STEER BY WIRE FAIL amber Caution Message illuminates on CAS, proceed as follows:
For airplanes SN 1000 thru SN 1143 without ASC 176.
1. Nose Wheel Steering Switch .............................................................................. OFF, then ON
2. If Message Stays On, Nose Wheel Steering Switch ...........................................................OFF
3. Use Brakes, Rudder, and/or Differential Power for Directional Control.
NOTE: Normal shimmy damping will be available with Nose Wheel Steering OFF.
AIRBORNE:
For airplanes SN 1144 and subs. or airplanes with ASC 176.
NOTE: Message will only illuminate with landing gear extended.
AFTER TAKEOFF:
1. Nose Wheel Steering Switch ..............................................................................................OFF
If the nose steering wheel is NOT centered, leave landing gear DOWN and land as soon as
practical.
If the nose steering wheel is centered, remove feet from rudder pedal(s) and hands-off nose
steering wheel.
2. Landing Gear ...........................................................................................................RETRACT
GULFSTREAM AEROSPACE
GIV AIRPLANE FLIGHT MANUAL
SECTION 3
ABNORMAL
PROCEDURES
FAA APPROVED 3-99
31 May 2000
ON APPROACH:
1. Nose Wheel Steering Switch ..............................................................................................OFF
AFTER LANDING:
1. Nose Wheel Steering Switch ............................................................................................... ON
A. If message extinguishes, expect normal nose wheel steering output.
B. If message remains ON, use Brakes, Rudder, and/or Differential Power for Directional
Control.
GULFSTREAM AEROSPACE
GIV AIRPLANE FLIGHT MANUAL
SECTION 3
ABNORMAL
PROCEDURES
3-100 FAA APPROVED
31 May 2001
3-19-40: Nutcracker System Fails To Shift To Ground Mode At Touchdown:
For airplanes with ASC 166
1. Red "Rev Unlock" message will illuminate with the use of thrust reversers. Thrust reversers
will stow at low ground speed.
2. Ground spoilers will deploy with wheel spin-up, but will retract at low ground speed.
3. Anti-skid system may not operate normally. Be prepared to turn anti-skid off at low ground
speed if you lose brakes.
4. Engine idle will go to 67% HP at low ground speed.
5. APU air is inoperative.
6. Pressurization outflow valve will not open automatically. Switch to manual and open
outflow valve.
7. Stick shaker and pusher remain armed.
8. Landing gear handle is not safe (safety solenoid energized).
9. Engines cannot be restarted.
For airplanes without ASC 166
1. Thrust reversers are inoperative.
2. If speed brakes are used, red "Acft Config" message will come on.
3. Ground spoilers will deploy with wheel spin-up, but will stow at low ground speed.
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湾4飞机飞行手册AFM Gulfstream IV AIRPLANE FLIGHT MANUAL 1(75)
