(5)
Door Lock, Landing Gear - (Ref 32-00-15)
B. References
(1)
AMM 05-51-01/201, Hard Landing or High Drag/Side Load Landing Condition
(2)
AMM 24-22-00/201, Electrical Power - Control
(3)
AMM 29-11-00/201, Pressurize/Depressurize Main Hydraulic System
(4)
AMM 32-00-20/201, Landing Gear Downlocks
(5)
AMM 32-21-09/401, Nose Gear Torsion Links
(6)
AMM 71-11-04/201, Fan Cowl Panels
(7)
AMM 78-31-00/201, Thrust Reverser System
C. Prepare to Tow the Airplane
S 862-002
CAUTION: MAKE SURE ALL ENGINE COWLS ARE CLOSED AND LATCHED BEFORE THE
_______ AIRPLANE IS TOWED. DAMAGE TO THE AIRPLANE AND EQUIPMENT CAN OCCUR.
(1) To prepare to tow the airplane, do the steps that follow:
(a)
Make sure you have an approved brake operator in the flight compartment.
(b)
Close the fan cowl panels (AMM 71-11-04)
(c)
Close the thrust reverser (AMM 78-31-00)
CAUTION: THE TOWING LEVER LOCK PIN MUST BE IN THE TOWING POSITION
_______ BEFORE YOU TOW THE AIRPLANE. FAILURE TO PUT THE TOWING LEVER IN THE TOWING POSITION CAN CAUSE DAMAGE TO THE TOW FITTING, TOW BAR (IF USED), OR THE STEERING COMPONENTS.
(d) Move the towing lever (shown on Figure 201) on the metering valve module to the TOWING position.
NOTE: When you hold the tow lever in the TOWING position with
____ the lockpin, the nose gear steering will not operate. This is when the hydraulic system is pressurized.
NOTE: You can make the airplane turn 65 degrees and not
____ disconnect the torsion links (the steering actuator bottoms at 65 degrees). To turn more than 65 degrees, the torsion links must be disconnected.
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(e) Install the towing lever lock pin.
(f) Make sure the downlocks are installed on the nose and main
landing gear (AMM 32-00-20).
NOTE:____ It is optional to install the landing gear downlocks
when you tow or push the airplane for flight. This is
when the airplane is in position for the flight crew to
taxi the airplane prior to or after a flight.
CAUTION: DO NOT TOW THE AIRPLANE WHEN A SHOCK STRUT, OF THE LANDING
_______ GEAR, IS COMPRESSED FULLY. IF YOU MUST TOW THE AIRPLANE IN AN EMERGENCY, FOLLOW THE INSTRUCTIONS BELOW. IF YOU DO NOT FOLLOW THESE INSTRUCTIONS, DAMAGE TO THE SHOCK STRUT CAN OCCUR.
IT IS PERMITTED TO TOW THE AIRPLANE WITH ONE OR MORE DEFLATED SHOCK STRUTS. THIS IS IF YOU LIMIT THE TOW SPEEDS TO 5 MPH ON ROUGH GROUND. WHEN THE AIRPLANE HAS A DEFLATED NOSE STRUT, IT IS RECOMMENDED TO TOW THE AIRPLANE STRAIGHT FORWARD ONLY. THE TOWING ANGLE MUST ALSO BE KEPT TO A MINIMUM.
(g) Make sure that the shock struts have a minimum extension of two inches on all of the landing gear (See Figure 201A for the procedure to the measure shock strut extension).
NOTE: You can tow the airplane with deflated shock struts
____ (zero shock strut extension) in an emergency if you obey the limits in the caution note.
CAUTION: THE MAXIMUM PERMITTED SHOCK STRUT EXTENSION FOR THE NOSE
_______ LANDING GEAR IS 10 INCHES. THIS IS TO MAKE SURE THE CENTERING CAM DOES NOT ENGAGE. THIS IS ALSO TO KEEP A FORWARD CENTER OF GRAVITY SO THE AIRPLANE WILL NOT ROTATE ON ITS TAIL. IF YOU DO NOT FOLLOW THESE INSTRUCTIONS, DAMAGE TO THE AIRPLANE CAN OCCUR.
(h) Make sure the open surface of inner cylinder chrome of the nose landing gear is not more than 10 inches.
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TOWING LEVER SEE A
TOWING LEVER LOCKPIN
TOWING LEVER (IN TOWING POSITION)
A
Nose Gear Steering Valve Lockpin Installation 中国航空网 www.aero.cn 航空翻译 www.aviation.cn 本文链接地址：757 AMM 飞机维护手册 TOWING & TAXIING(2)
