(f)
Wind speeds above the one you identify will require the airplane to be moored or the parking brake to be set. Wind speeds below the one you identify do not require the airplane to be moored.
S 862-009
(7)
Pressurize hydraulic system No. 4 (Ref 29-11-00/201).
S 862-010
(8)
Set the parking brakes:
(a)
Turn the battery switch on.
(b)
Set the standby power switch to AUTO.
(c)
Close the 6L18 PARK BRAKE circuit breaker on the P6 Main Power Distribution Panels.
(d)
Push the toe of the rudder pedals fully and pull on the parking brake lever on the control stand.
(e)
Remove the pressure from the brake pedals before you let go of the parking brake lever.
(f)
Make sure that a PARKING BRAKE SET indication comes into view on the EICAS screen.
(g)
Put the chocks on all main gear wheels to prevent movement in the forward and the aft direction.
(h)
Connect the forward and the aft chocks together with a strap.
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MAINTENANCE MANUAL
ICY
WET
DRY
100
80
60
40
20
0
WIND VELOCITY - KNOTS
PARKING WITHOUT PARKING BRAKE BEING SET FOR PARKING PARKING WITH PARKING BRAKE BEING SET FOR PARKING
Airplane Stability - High Wind Parking
Figure 201 (Sheet 1)
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MAINTENANCE MANUAL
NOTES: A. FLAPS UP, STAB = 3 PILOT UNITS (HORIZONTAL)
B. WIND FROM ANY DIRECTION
C. WIND GUST SHOULD BE ADDED TO STEADY WIND VELOCITY FOR MAXIMUM WIND SPEED
D. USE ACTUAL AIRPLANE WEIGHT, CG POSITION, AND TIRE-TO-GROUND FRICTION COEFFICIENT FOR INTERPOLATION
E. IF NO MEASURED VALUE FOR TIRE-TO-GROUND FRICTION COEFFICIENT IS AVAILABLE, USE THE LOWER LIMIT OF THE APPROPRIATE BOUNDED FRICTION BAND
F. WIND VELOCITIES HIGHER THAN INDICATED IN THE CHART ABOVE MAY CAUSE SLIDING OF THE NOSE GEAR OR MAIN GEAR TIRES
G. BASED ON ZERO PERCENT GROUND SLOPE
H. FOR TOWING AND MANEUVERING IN CLOSE PROXIMITY TO BUILDINGS OR OTHER AIRCRAFT, REDUCE THE ALLOWABLE WIND BY ONE-THIRD.
I. REDUCE THE WIND LIMITS TO ACCOUNT FOR OPERATIONS SUCH AS CONTAMINATED RUNWAYS.
APPROXIMATE NORMAL RANGES SHOWN AFTER 8 HOURS, THE HYDRAULIC SYSTEM MUST BE REPRESSURIZED
Airplane Stability - High Wind Parking
Figure 201 (Sheet 2)
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747-400 MAINTENANCE MANUAL
(i)
Keep the parking brake set unless the brake temperature indicator shows an overheat light.
(j)
If the brakes become too hot, release the parking brake only after the installation of the chocks.
NOTE: To release the parking brake, apply toe pressure on the
____ rudder pedals and then release the toe pressure.
(k)
Set the standby power switch to OFF.
(l)
Turn the battery switch off if it is not necessary.
S 492-011
(9)
If you removed the engines, attach concrete blocks that are approximately equal to the weight of the engines (Ref 71-00-02/401).
S 422-017
(10)
Close and latch all the external doors, the hatches, and the access panels.
S 022-016
(11)
Remove all the stands and movable objects from the area.
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