S 842-032
(11)
Put the airplane to it's usual condition (see par. 12).
TASK 09-11-00-582-033
6. Tow the Airplane (With Body Landing Gear Not Centered)
________________
A. General
(1)
Make sure you use the body landing gear steering system (Ref 32-53-00/001) when you follow this procedure. As part of this procedure, follow the normal towing procedures (par. 2 and 3).
(2)
The condition of the runway (wet or dry), the airplane gross weight, and the airplane CG can affect the performance of the system.
(3)
Do not disconnect the nose gear torsion links. This will allow the body landing gear steering system to work when the nose gear is turned 20 degrees or more.
(4)
The position of the body gear trucks will change with the direction of the entry path.
(5)
The exit path for towing an airplane from a parked position is shown on Fig. 208.
(6)
The exit path is identified on Fig. 209.
(7)
The system performance and a recommended towing procedure for each exit path is shown in Fig. 210.
(a)
The towing procedure will be effected by the parked position of body trucks (steered or centered), No. 1 hydraulic system pressure, electrical power, and the exit path (Fig. 210).
(b)
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. Figure 210 will show you the exit path comments and towing procedures when the main gear body trucks are not in the center when the airplane is parked.
B. References
(1) 32-53-00/001, Body Gear Steering
C. Procedure
S 842-034
(1) Prepare to tow the airplane (see par. 2).
EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú
09-11-00
ALL ú ú 04 Page 230 ú Jun 18/00
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
747-400
MAINTENANCE MANUAL
Parked Airplane
Figure 208
EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú
09-11-00
ALL ú ú 04 Page 231 ú Jun 18/00
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
747-400
MAINTENANCE MANUAL
PATH DESCRIPTION
A Forward direction turn with nose gear steering angle in the range of 20 to 70 degrees in the same direction as for the entry path.
B Forward direction with nose gear steering angle in the range of |20 degrees from straight.
C Forward direction turn with nose gear steering angle in the range of 20 to 70 degrees in the opposite direction as for the entry path.
D forward path of length d, Fig. 207 (20 to 40 feet). Identical to C except preceded by a straight (nose gear angle |20 degrees)
E Aft direction turn with nose gear steering angle in the range of 20 to 70 degrees in the same direction as for the entry path.
F Aft direction with nose gear steering angle in the range of |20 degrees from straight.
G Aft direction turn with nose gear steering angle in the range of 20 to 70 degrees in the opposite direction as for the entry path.
H Identical to G except preceded by a straight (nose gear angle |20 degrees) aft path of length d, Fig. 207 (20 to 40 feet).
Exit Paths
Figure 209
EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú
09-11-00
ALL ú ú 04 Page 232 ú Jun 18/00
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
747-400
MAINTENANCE MANUAL
BODY TRUCKS POSITION OF PARKED PRESSURIZED SYSTEM HYDRAULIC NO. 1 POWER AVAILABLE ELECTRICAL (Fig. 208) EXIT PATH TOWING PROCEDURE COMMENTS AND
and Locked Centered Yes Yes A,B,C,D,F required. No special towing procedure Body trucks steer as desired.
中国航空网 www.aero.cn
航空翻译 www.aviation.cn
本文链接地址：747-400 AMM 飞机维护手册 TOWING AND TAXIING(13)
