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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A 737-300/400/500MAINTENANCE MANUAL
FWD 
SEE  A 
NOSE GEAR 

TOWBAR CROSSBOLT
1
A
1 NOT ON ALL AIRPLANES
Airplane Towbar Attach Point Figure 205
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A
737-300/400/500MAINTENANCE MANUAL
 S 862-010
 (7)  Remove the external electrical power (AMM 24-41-00) or shut down the APU (AMM 49-11-00).
 S 782-011
 WARNING: IF THE NOSE GEAR STEERING LOCKOUT PIN IS NOT INSTALLED, MAKE
_______ SURE THAT THE PRESSURE IN HYDRAULIC SYSTEM A IS COMPLETELY REMOVED BEFORE TOWING THE AIRPLANE. FAILURE TO OBEY COULD RESULT IN INJURY TO PERSONNEL AND DAMAGE TO THE STEERING COMPONENTS.
 CAUTION: TO AVOID DAMAGE TO THE STEERING COMPONENTS OR THE TOWING,
_______ EQUIPMENT, THE DEPRESSURIZATION VALVE KNOB MUST BE DEPRESSED AND HELD WHEN THE LOCKOUT PIN IS INSERTED.
 (8)  Depress the knob and install the nose gear steering lockout pin in the steering depressurization valve (AMM 32-00-01), or remove the pressure of the hydraulic system A.
 NOTE: You can install and remove the nose gear steering
____ depressurizing lockout pin from the aft of right nose wheel well door without entering the wheel well.
 S 862-019
 (9)  
Connect the interphone system between the control cabin, the tow tractor operator, and the towing ground crew.

 S 862-002

 (10)
 Make sure you have an approved brake operator in the flight
 compartment.

 S 212-020

 (11)
 Make sure that the ramp area is clear of all stands and equipment in the towing path.

 S 862-012

 (12)
 Connect the tow bar to the tow tractor and to the airplane, if it is necessary.

 S 862-013

 (13)
 Remove the airplane static ground wires.

 G. Tow the Airplane from the Nose Gear
 S 582-021
 (1)  Put into position the wing, the tail, the tow tractor operator, and the ground crew so that all are in visual contact.
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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A 737-300/400/500MAINTENANCE MANUAL
WIND DIRECTION
ICY1 WET1  DRY1
100
80
60
40
20
0
0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8
TIRE/GROUND FRICTION COFFECIENT, .
NOTE: AT WIND SPEEDS ABOVE THE WEIGHT CURVES, THE AIRPLANE
 IS SUSCEPTIBLE TO WEATHERVANING.

A. THE LIMITING FACTOR IS ADHESION OF THE NOSE GEAR TIRES WITH THE GROUND.
B. THE WIND IS FROM ANY DIRECTION.
C. THE ALLOWABLE STEADY WIND PLUS THE GUST VELOCITY SHALL NOT EXCEED 2/3 TIMES THE STEADY WIND PLUS THE GUST VELOCITY NECESSARY FOR WEATHERVANING.
D. THE STEADY WIND PLUS THE GUST VELOCITY = PEAK WIND VELOCITY.
E. THE WIND GUST VELOCITIES ANTICIPATED SHALL BE ADDED TO THE STEADY WIND VELOCITY TO APPRAISE GROUND OPERATIONS.
F. FOR TOWING AND MANEUVERING IN CLOSE PROXIMITY TO BUILDINGS OR OTHER LARGE AIRCRAFT THE ALLOWABLE WIND VELOCITIES SHALL BE REDUCED BY 1/3.
G. FLAPS UP
H. STABILIZER SET AT 3 PILOT UNITS.
WIND VELOCITY - KNOTS

1  APPROXIMATE NORMAL 
RANGES SHOWN  J. VALID FOR ALL CGs 
Wind Velocity During Towing 
Figure 206 

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A

737-300/400/500
MAINTENANCE MANUAL

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