(2)
Each main landing gear has an eye for towing at each end. They are used for airplane recovery and other unusual operations.
D. You must be careful when you tow the airplane in a turn. Do not cause more than the Maximum Towing Loads as shown in Figure 203.
NOTE:____Try not to make small turns. A small turn radius can cause an increase in the tire wear. This occurs most frequently during the pushback operation.
EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú
09-11-00
ALL ú ú 01 Page 201 ú Oct 10/96
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
747-400
MAINTENANCE MANUAL
E. Make sure you have the necessary clearance when you go near a parked airplane or other structures. When the APU in the towed airplane or a parked airplane is on, you must have a minimum clearance of 32.8 feet (10 meters). The clearance must be between the APU exhaust port and the adjacent airplane's wingtip (fuel vent).
F. Towing stability of a Towbarless Tow Vehicle (TLTV)/Airplane combination is dependent on many variables, two of these key variables being the characteristics of the tow vehicle tractive forces and the runway conditions. Maximum towing speeds shall be the responsibility of the airplane operator in conjunction with the airport authority with consideration of recommendations from the TLTV manufacturer.
WARNING: MOST TOWBARLESS TOW VEHICLES DO NOT HAVE A SHEAR PIN TO LIMIT THE
_______ LOADS IF THE AIRPLANE BRAKES ARE USED DURING TOWING. DO NOT APPLY THE AIRPLANE BRAKES WHEN YOU TOW THE AIRPLANE WITH TOWBARLESS TOW VEHICLES. IF YOU APPLY THE BRAKES, YOU CAN APPLY LOADS TO THE NOSE LANDING GEAR THAT ARE MORE THAN THE DESIGN LOAD LIMITS. IF YOU DO NOT OBEY THIS CAUTION, DAMAGE WILL OCCUR TO THE NOSE LANDING GEAR, THE TOW VEHICLE, AND MAINTENANCE PERSONS CAN BE INJURED.
G. You can use towbarless equipment to push or pull the airplane. Make sure the maximum permitted loads on the landing gear are not more than the Maximum Towing Loads as shown in Figure 203.
NOTE: This procedure is for towing or pushing the airplane with a tow bar. However, most of the steps in this procedure will apply if you use towbarless equipment. Refer to the equipment manufacturers data for procedures that are specific to their equipment.
H. Boeing recommends towbarless tow vehicles be designed, tested, operated, and maintained per the following Society of Auromotive Engineers (SAE) Aerospace Recommended Practices (ARP), and applicable Boeing documentation:
NOTE: Airplanes must insure the latest revisions of the standards and
____
documents are applied.
(1) Towbarless tow vehicles documents and standards:
EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú
09-11-00
ALL ú ú 04 Page 202 ú Oct 18/01
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
747-400
MAINTENANCE MANUAL
(2) Towbarless tow vehicles documents and standards:
(a)
SAE ARP 4853: Specification for Towbarless Tow Vehicles (TLTV).
(b)
SAE ARP 5283: Towbarless Tow Vehicles - Aircraft Nose Landing Gear Steering and Tractive Force Protection Systems or Alerting Devices - Inspection, Maintenance, and Calibration Requirements.
(c)
SAE ARP 5285: Towbarless Towing Vehicle Operating Procedure.
(d)
Boeing Document D6-56872: Towbarless Towing Vehicle Assessment Criteria.
(e)
Boeing Service Letter 747-SL-09-002: Towbarless Towing Evaluation.
NOTE: The service letter provides additional guidance and
____ information regarding towbarless towing recommendations and regulatory requirements.
I. If you tow the airplane at an angle and weight more than is specified, do the Exceeding Maximum Nose Gear Towing Angle or Maximum Towing Load Conditional Inspection (AMM 05-51-29/201).
中國航空網 www.k6050.com
航空翻譯 www.aviation.cn
本文鏈接地址：747-400 AMM 飛機維護手冊 TOWING AND TAXIING(2)
