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in the brake system, rendering the anti-skid system inoperative. The brake system has
automatically switched to the “open-loop, pulsed control” braking mode, often called
“bang-bang” braking. Open-loop, pulsed control braking may be eliminated by selection
of the anti-skid system to off, using the ANTI SKID ON/OFF switch located on the center
pedestal.
TAKEOFF:
During takeoff with anti-skid inoperative or selected off, the wheel spindown
function will be disabled. Perform the following steps for takeoff with anti-skid
inoperative or selected off:
1. ANTI SKID ON/OFF Switch ............................................................................OFF
2. Applied Brake Pressure.........................................................DISPLAY ON DU 4
AFTER LIFT-OFF, BEFORE LANDING GEAR RETRACTION:
3. Light Brake Pressure..............................MOMENTARILY APPLY (300-400 PSI)
APPROACH AND LANDING:
If anti-skid is selected off, braking should be performed using procedures
contained in Section 05-02-20, Anti-Skid Off Braking (Brake-By-Wire) (SN 1000
Through 1213 Without ASC 190/266), or Section 05-02-30, Anti-Skid Off Braking
(Brake-By-Wire) (SN 1000 Through 1213 With ASC 190/266).
If anti-skid is not selected off, braking in the open-loop, pulsed control braking
(bang-bang) mode should be performed using the following procedure:
4. ANTI SKID ON/OFF Switch................................................................VERIFY ON
5. Applied Brake Pressure.........................................................DISPLAY ON DU 4
6. Maximum Reverse Thrust .........................................................................APPLY
7. Braking .............................................USE AS REQUIRED AT HIGHER SPEEDS
AT APPROXIMATELY 100 KNOTS:
8. ANTI SKID ON/OFF Switch ............................................................................OFF
NOTE:
At speeds below 100 knots, the pulsing of open-loop,
pulsed control braking causes braking action to be
jerky.
9. Anti-Skid OFF Braking Procedure ......................................................CONSULT
See Section 05-02-20, Anti-Skid Off Braking (Brake-By-Wire) (SN 1000 Through
OPERATING MANUAL
EXPANDED ABNORMAL / EMERGENCY PROCEDURES 05-02-00
Page 1
October 11/01
Revision 5
1213 Without ASC 190/266), or Section 05-02-30, Anti-Skid Off Braking (Brake-
By-Wire) (SN 1000 Through 1213 With ASC 190/266).
NOTE:
An increase in landing distance will result if landing
rollout is made with anti-skid completely inoperative or
under open loop pulsed anti-skid control. For landing
distances with anti-skid inoperative, see the LANDING
FIELD LENGTH, ANTI-SKID INOPERATIVE charts in
the Performance section of the GIV Airplane Flight
Manual or Operating Manual Section 13-03-20,
Landing Field Length Charts (GIV-SP) and Section
13-03-30, Landing Field Length Charts (Non-SP GIV).
Use of reverse thrust reduces landing distances given
in the AFM/OM.
05-02-20: Anti-Skid Off Braking (Brake-By-Wire) (SN 1000 Through 1213
Without ASC 190/266)
Selection of the anti-skid system to off, using the ANTI SKID ON/OFF switch located on
the center pedestal, will be indicated by display of the amber ANTI-SKID FAIL message
on CAS.
With the anti-skid system selected off, normal anti-skid control and open-loop, pulsed
control braking is not available. Applied brake pressure is proportional to brake pedal
deflection.
TAKEOFF:
During takeoff with anti-skid inoperative or selected off, the wheel spindown
function will be disabled. Perform the following steps for takeoff with anti-skid
inoperative or selected off:
1. ANTI SKID ON/OFF Switch ............................................................................OFF
2. Applied Brake Pressure.........................................................DISPLAY ON DU 4
AFTER LIFT-OFF, BEFORE LANDING GEAR RETRACTION:
3. Light Brake Pressure..............................MOMENTARILY APPLY (300-400 PSI)
APPROACH AND LANDING:
Use the following procedure when braking with anti-skid selected off:
4. ANTI SKID ON/OFF Switch ............................................................................OFF
5. Applied Brake Pressure.........................................................DISPLAY ON DU 4
6. Maximum Reverse Thrust .........................................................................APPLY
7. Braking...................APPLY LIGHT BRAKING WHEN SPEED DECREASES TO
OPERATING MANUAL
05-02-00 EXPANDED ABNORMAL / EMERGENCY PROCEDURES
Page 2
October 11/01
Revision 5
APPROXIMATELY 100 KNOTS, GRADUALLY INCREASE TO MODERATE
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湾流4操作手册 Gulfstream IV Operating Manual 3(69)
