Nose Gear
Figure 001
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Nose Gear - General
Figure 002
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INTENTIONALLY BLANK
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Nose Gear - Side View and Looking Aft
Figure 003
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Nose Gear - Side View and Looking Aft
Figure 003A
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R R Nose Gear - Leg Attachments Figure 004
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The lockstay assembly gives secondary bracing.
The lockstay assembly includes two parts connected by a spherical
bearing:
-
the upper link made of forged aluminum alloy, which hinges on the leg,
-
the lower link made of forged steel.
The forestay of the primary bracing assembly hangs on the aircraft from
two trunnions in the same way as the gear leg. Some hinge points include
spherical bearings to permit movement to allow for deformation.
(Ref. Fig. 005)
A hydraulic cylinder on the nose gear lockstay locks and unlocks both
brace assemblies in Normal operation.
If the hydraulic pressure is not available, two traction springs pull and
hold the leg in the extended locked position in Free Fall extension mode.
One spring is sufficient to operate the lockstay mechanism.
C. Nose Gear Uplock The nose gear uplock assembly holds the gear in the retracted position. The uplock roller is installed on the upper hinge pin of the drag strut universal joint.
D. Nose Gear Actuating Cylinder A double-acting actuating cylinder with a spherical bearing at each end, operates the nose gear. The cylinder body is attached to the rear wall of the nose gear well. The cylinder sliding rod is attached to the gear leg. The actuating cylinder contains devices for metering the hydraulic fluid. These slow down movement of the gear at the end of retraction and during the complete extension cycle.
R **ON A/C 001-049, 051-099, 101-149, 151-199, 201-299, 401-499,
E. NLG Tires The radial type tires or conventional type tires are installed on the gear. The dimensions of these tires are 30 x 8.8 -15 and 30 x 8.8 R15. On the 64.4T version, the inflation pressure is 11.3 bars. On the 66T version, the inflation pressure is 10.8 bars. On the 68T/70T versions, it is 11 bars and on the 73.5T/75.5T/77T versions it is 11.8 bars.
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Nose Gear - Forestay Attachments Figure 005
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**ON A/C 301-399,
E. NLG Tires The radial type tires or conventional type tires are installed on the gear. The dimensions of these tires are 30 x 8.8 -15 and 30 x 8.8 R15. Inflation pressure of the tires on the 82.2T version is 10.1 bars. On the 83T versions, it is 10.4 bars.
**ON A/C ALL
F. Nose Gear Doors The gear well is closed off by 5 doors when the gear is retracted:
-
2 main door assemblies operated by hydraulic power,
-
2 aft door assemblies connected by a mechanical linkage to the leg,
-1 leg door assembly on the rear part of the leg.
2. Component Location
__________________
(Ref. Fig. 006)
-------------------------------------------------------------------------------FIN | FUNCTIONAL DESIGNATION | PANEL|ZONE|ACCESS | ATA
| | | | DOOR | REF. -------------------------------------------------------------------------------2526GM LEG ASSY-NLG 711 32-21-11 2528GM STRUT ASSY-NLG DRAG 711 32-21-16
3. Component Description
_____________________
A. Gear Shock Absorber
(Ref. Fig. 007, 008)
**ON A/C 001-004, 051-054,
(Ref. Fig. 009)
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