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main gear retracted, expect the airplane to float farther than usual due to ground
effect. Immediately prior to stopping, shut down both engines using the FIRE
handles and select the batteries (BATT 1 / BATT 2) OFF. Anticipate the possibility
of a fire or spilled fuel on the ground after landing ground run.
OPERATING MANUAL
EXPANDED ABNORMAL / EMERGENCY PROCEDURES 05-19-00
Page 1
October 11/01
Revision 5
3. Procedures:
At the first indication of an abnormal landing gear condition, i.e., green light(s) not
on, check the indicating systems and circuit breakers. Retard the power levers to
check the landing gear warning horn. If indicating systems test satisfactorily but
still indicate an unsafe condition, execute a missed approach and proceed as
follows:
• Hydraulic Quantities and Pressure — CHECK
• Landing Gear — RECYCLE (170 KIAS)
If unsafe indications persist, perform Section 05-19-20, Landing Gear Alternate
Operation.
4. Determination Of Gear Condition:
The landing gear condition can be determined by the normal indicating system or
visual inspection by the tower or a chase plane. Any maneuvers such as tower
fly-by or formation flight with a chase plane should be employed with the utmost
caution by the pilot in command. If a chase plane is used, consideration should be
given to the ability of the pilot to fly formation and that the type of airplane used is
compatible for formation flight with a Gulfstream IV. When the actual gear
configuration has been determined, the following procedures can be employed to
assist in extending the gear for a normal landing. Failing these efforts,
recommended procedures are detailed for carrying out partial gear landings.
See the appropriate procedure contained within this section for the abnormal gear
condition:
• Nose Gear Retracted, Both Main Gear Down And Locked: Section
05-19-11
• One Main Gear And Nose Gear Down And Locked, Opposite Main Gear
Retracted: Section 05-19-12
• One Main Gear Only Down And Locked: Section 05-19-13
• Both Main Gear Retracted, Nose Gear Down And Locked: Section
05-19-14
05-19-11: Nose Gear Retracted, Both Main Gear Down And Locked
If contamination of the uplocks due to ice and snow is suspected, consider flying
to an area where melting can occur. If fully retracted, attempt to release from
uplocks by applying positive “g” loading not to exceed 2.5g with flaps UP (0°). If
partially extended but not locked down, perform a normal approach and firmly
bump the main wheels on the runway in an attempt to shake the nose gear down
and locked. Execute go-around. Consideration should be given to flying faster
than normal in order to increase elevator effectiveness and the nose falling
through on touchdown.
LANDING PROCEDURE:
1. Touchdown...........................................................RUNWAY CENTERLINE
2. Speed Brakes ..................................................EXTEND AS NECESSARY
3. Thrust Reversers ...............................USE MAXIMUM (BOTH ENGINES)
Using maximum reverse thrust on both engines will reduce the load on the
nose gear.
4. Wheel Brakes......................................................................USE MINIMUM
5. Nose...........................................................................FLY ONTO RUNWAY
OPERATING MANUAL
05-19-00 EXPANDED ABNORMAL / EMERGENCY PROCEDURES
Page 2
October 11/01
Revision 5
Relieve weight with elevator after runway contact.
6. Brakes................AS NECESSARY FOR DIRECTIONAL CONTROL AND
STOPPING
05-19-12: One Main Gear And Nose Gear Down And Locked - Opposite
Main Gear Retracted
If fully retracted, attempt to release from uplocks by applying positive “g” loading
not to exceed 2.5g with flaps UP (0°).
If partially extended, yaw the aircraft to apply spanwise air load to force the
affected gear outboard: left rudder for left main gear; right rudder for right main
gear. Attempt to lock unsafe gear down. At normal approach speeds, touch
affected gear on the runway with slight SKID force faulty gear leg outboard.
Execute go-around.
LANDING PROCEDURE:
1. Touchdown ..................................SIDE OF RUNWAY WITH SAFE GEAR
2. Speed Brakes...........................................EXTENDED (AS NECESSARY)
3. Thrust Reversers ....................USE MAXIMUM INITIALLY, GRADUALLY
DECREASING ON FAILED GEAR SIDE FOR DIRECTIONAL
CONTROL
4. Brakes................AS NECESSARY FOR DIRECTIONAL CONTROL AND
STOPPING
5. Unsafe Gear ...........RELIEVE WEIGHT WITH AILERONS AND THRUST
REVERSERS
　
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