(4)
If rupture of the internal stop in the lockstay occurs, movement of the lockstay is limited by the internal stop of the lockstay downlock actuator.
(5)
The lockstay downlock actuator (Ref. 32-31-00) has these
characteristics:
-Lock release section: 2.78 square centimeters,
-Locking section: 5.61 square centimeters,
-Travel: 85.6 mm.
The lockstay downlock actuator includes a fluid metering device which
slows down alignment of the struts at the end of extension of the
gear.
This decreases loads caused by downlocking of the gear.
(6)
If failure of the lockstay hydraulic cylinder occurs, two springs help downlocking. Each spring puts a load of 43 daN on the lockstay.
(7)
On the ground, a safety pin prevents accidental release of the gear. This safety pin locks the two arms of the lockstay. It is only possible to put the pin into the two arms if the lockstay is in the locked position. (Ref. Fig. 013)
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Nose Gear - Proximity Detectors Figure 011
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Nose Gear - Lockstay Assembly Figure 012
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Safety Pin
Figure 013
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1 1 Nov 01/00
1 1
1CES 1
E. Nose Gear Actuating Cylinder (Ref. 32-3) This actuating cylinder has these characteristics: - Retraction section: 39.69 square centimeters, - Extension section: 49.24 square centimeters, - Travel: 287.9 mm. The actuating cylinder includes a fluid metering device which operates: - At the end of retraction of the gear to make sure that the gear locks in the retracted position without shocks. - Permanently during extension. Overtravel is permitted in the actuator to prevent internal bottoming during conditions where the actuator operates under limit conditions. Each end fitting is equipped with a spherical bearing that is replaceable.
F. Steering System Components (Ref. 32-51-00) These include :
(1) A servo control for nose wheel steering.
(2) Two anti-shimmy valves.
(3) A rotating joint.
(4) Two feedback sensors to show the position of the rotating tube.
(5) An electrical box for the deactivation of the nose wheel steering system before towing.
G. Taxi and Turn off Lights
H. APPLETON ground connector The APPLETON ground connector is used for connection of the gear to the ground during maintenance operations.
R **ON A/C 051-099,
R R R R J. Tire Pressure Indicating System The gear is equipped with an electrical wire bundle. This bundle can supply power to the transducer that can be installed as an option in the wheel axle.
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4. Materials and Technology
________________________
A. Materials
-Shock strut: Aluminum alloy 7010, R more than or equal to 500 MPa
-Sliding tube, including axle = 35NCD 16 steel, R more than or equal to 1800 MPa
-Rotating tube = 35NCD 16 steel, R more than or equal to 1230 MPa
-Drag strut: forestay = Aluminum alloy 7010 and lower arm = 35NCD 16 steel
-Actuating cylinder: cylinder = 35CD4 steel, R more than or equal to 1180 MPa and rod = 35NCD 16 steel, R more than or equal to 1230 MPa
B. Technology The main elements of the structure are interchangeable without any adjustment. All the hinges have replaceable bronze bushes. Lubricators are provided on all the rotating or fixed hinges which are installed without interference. The chromium-plated end fittings and pins have thickness allowances for repair. All the spherical bearings are installed in replaceable cages. A 3-coat paint is applied to all the external or internal surfaces (not chromium-plated). The minimum thickness of chromium deposit is 100 microns.
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NOSE GEAR - DEACTIVATION/REACTIVATION
_____________________________________
TASK 32-21-00-040-001
Deactivation of the NLG TOWING attachement (2701GM).
1. Reason for the Job
__________________
R Refer to the CDL TASK: 32-3 R Nose Fitting Towing
2. Job Set-up Information
______________________
A. Fixtures, Tools, Test and Support Equipment
-------------------------------------------------------------------------------REFERENCE QTY DESIGNATION -------------------------------------------------------------------------------
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