S 842-036
(6)
Put the airplane to it's usual condition (see par. 12).
TASK 09-11-00-582-037
7. Tow the Airplane (Maximum Weight 500,000 Pounds) Supported by the Nose Gear
___________________________________________________________________________ and Body Gear
_____________
A. References
(1)
12-15-04/301, Body Landing Gear Shock Strut
(2)
12-15-05/301, Nose Landing Gear Shock Strut
(3)
12-15-06/301, Landing Gear Tire
B. Procedure
S 842-038
(1) Prepare to tow the airplane (see par. 2).
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747-400 MAINTENANCE MANUAL
S 862-039
CAUTION:_______ AT THIS WEIGHT AND GEAR CONDITION, TOW THE AIRPLANE STRAIGHT
FORWARD OR STRAIGHT BACK. IF YOU MUST TURN THE AIRPLANE;
FIRST, FOLLOW A STRAIGHT PATH, AND THEN USE THE MINIMUM TURN
ANGLE NECESSARY. START THE TURN AFTER THE AIRPLANE HAS STARTED
TO MOVE. DO NOT MAKE A TURN THAT IS LARGER THAN 15 DEGREES.
DAMAGE TO THE LANDING GEAR CAN OCCUR.
(2)
Make sure that the nose gear steering linkage is connected.
S 862-040
(3)
Make sure the nose and body gear are fully serviceable (Ref 12-15-04/301, 12-15-05/301).
S 782-041
(4)
Make sure the tire pressures are correct (Ref 12-15-06/301).
S 582-086
WARNING: IF YOU LOSE HYDRAULIC POWER ON THE AIRPLANE WHILE YOU ARE
_______ TOWING THE AIRPLANE, YOU MUST TELL THE TOW VEHICLE OPERATOR. YOU MUST DECREASE THE TOW SPEED OR STOP TOWING, IF IT IS NECESSARY. IF YOU HAVE A DECREASE IN HYDRAULIC POWER, ONLY ACCUMULATOR PRESSURE WILL BE AVAILABLE FOR BRAKE OPERATION.
IF YOU HAVE A DECREASE IN HYDRAULIC POWER WHILE TOWING, DO NOT APPLY THE BRAKES EXCEPT IN AN EMERGENCY OR UNTIL THE AIRPLANE IS PARKED. SMALL PRESSURE ON THE PEDAL ENDS WILL CAUSE A LOSS OF HYDRAULIC BRAKE PRESSURE. A DECREASE IN HYDRAULIC PRESSURE WILL LIMIT THE ABILITY OF THE BRAKE SYSTEM TO STOP THE AIRPLANE.
CAUTION: IN THIS CONFIGURATION, DO NOT USE THE AIRPLANE BRAKES TO TURN
_______ OR STOP THE AIRPLANE. DAMAGE TO THE LANDING GEAR CAN OCCUR.
(5) Tow the airplane.
NOTE: For airplane clearances while towing, see Fig. 207.
____
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747-400
MAINTENANCE MANUAL
WARNING: WHEN YOU TOW THE AIRPLANE, ALL PERSONS MUST STAY OUT OF
_______ THE DANGEROUS AREAS AROUND THE TOW VEHICLE, TOW BAR, NOSE WHEELS, AND THE MAIN WHEELS. PERSONS ON THE GROUND MUST KNOW IT IS POSSIBLE TO BE RUN OVER BY THE NOSE WHEELS, MAIN WHEELS, AND THE TOW VEHICLE. THIS IS BECAUSE THE AIRPLANE WILL CHANGE POSITION DURING PUSHBACK AND TOWING. MAKE SURE YOU KEEP A MINIMUM OF 10 FEET SEPARATION BETWEEN PERSONS ON THE GROUND AND THE EQUIPMENT THAT MOVES. IF YOU DO NOT KEEP THE MINIMUN DISTANCE, A FATAL INJURY CAN OCCUR.
(a)
Make sure the persons that work near the areas that follow, know the pushback hazard zones as shown in Figure 207A:
-
tow vehicle
-
tow bar
-nose wheels
-main wheels.
(b)
To center the body landing gear trucks that have been parked in a steered position, do the step that follows:
NOTE: This is when hydraulic power is not available.
____
1) Tow the airplane forward or aft with the nose gear steering angle set for the same direction turn as the body gear trucks.
2) When the body landing gear center and lock, you can follow the normal towing procedures (par. 2 and 3).
(c) The main gear body trucks will center and lock when a straight path of 20- to 40-feet is used to get the airplane to the parked position.
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