(4)
Z value of the points 40 and 41
(Ref. Fig. 605/TASK 05-56-00-991-007)
(a) Measure the height of the points 40 and 41. Use a sight tube set at -3500 mm (137.7953 in.) from the horizontal datum of the fuselage.
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R X Position of the Point 32L
R Figure 611B/TASK 05-56-00-991-013-B
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XY Values of the Engine Pylons
Figure 612/TASK 05-56-00-991-014
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G. Position of the Landing Gear
(1) Nose landing gear (NLG)
(a)
X position (Ref. Fig. 613/TASK 05-56-00-991-015)
(b)
Y position (Ref. Fig. 613/TASK 05-56-00-991-015)
1_ Make a projection to the floor of the centerline of the NLG
jacking point with SET-PLUMB BOBS MLG NLG WHEELS
(98D08003000000)
2_ Align a cord with HOLDING SET - MEASURING CORD
(98A08001005000) along the centerline of the aircraft through
the points 11 and 12.
3_ Write down the X position of the jacking point in relation to
the point 11 (dimension XC).
4_ Calculate the position of the axis of the shock strut of the
landing gear.
1 Measure the variation between the axis of the NLG shock strut
_ and the aircraft centerline.
2 The sign of the deviation is + if the offset of the axis of
_ the shock strut is to the right. It is - if the offset is to the left.
(c) Verticality of the axis of the shock strut (Ref. Fig. 613/TASK 05-56-00-991-015)
1 Write down the angle Alpha (left side) (in a plane
_ perpendicular to the aircraft centerline). Write down the angle Beta (in a plane parallel to the aircraft centerline). Do these measurements with a clinometer.
(2) Main landing gear (MLG)
(a) X position (Ref. Fig. 613/TASK 05-56-00-991-015) For each landing gear :
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R XY Values of the Engine Pylons
R Figure 612A/TASK 05-56-00-991-014-A
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X and Y Positions of the Landing Gears
Figure 613/TASK 05-56-00-991-015
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1_ Align a cord with HOLDING SET - MEASURING CORD
(98A08001005000) along the centerline of the aircraft through
the points 11 and 12.
2_ Write down a perpendicular line to the aircraft centerline in
relation to the point 11.
3_ Make a projection to the floor of the axis of the MLG jacking
points with the tool SET-PLUMB BOBS MLG NLG WHEELS
(98D08003000000).
4_ Write down the X position of the axis of the shock strut in
relation to the point 11.
(b) Y position and symmetry of the landing gears (Ref. Fig. 614/TASK 05-56-00-991-016)
1 Put the LANDING GEAR WHEEL TOE-IN LINE BAR (98D08103000000) or
_ LANDING GEAR WHEEL TOE-IN LINE BAR (98D08103000001) in horizontal position on outboard side of the main landing gear wheel.
2 Make a projection of the two ends to the floor with the plumb
_ line.
3 Measure the distance of the projections of the points to the
_ aircraft centerline. Subtract the forward and aft dimensions and calculate the toe-in of the landing gears.
(c) Angles of the axis of the shock strut (Ref. Fig. 613/TASK 05-56-00-991-015)
1 Write down the angle Alpha (left side) (in a plane
_ perpendicular to the centerline of the aircraft). Write down the angle Beta (in a plane parallel to the centerline of the aircraft). Do these measurements with a clinometer.
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R X and Y Positions of the Landing Gears
R Figure 613A/TASK 05-56-00-991-015-A
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Symmetry of the Main Landing Gears
Figure 614/TASK 05-56-00-991-016
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