(3)
Do this task: "Leading Edge Flap Retraction" (Ref 27-81-00/201).
S 862-077
(4)
Remove the DO-NOT-OPERATE tag from the flap control lever.
S 862-021
(5)
Remove electrical power if it is not necessary
(Ref 24-22-00/201).
TASK 33-42-02-822-022
3. Landing Light - Light Beam Adjustment (Fig. 201 thru 204)_____________________________________
A. Special Tools and Equipment
(1)
Lock, Leading Edge Flap Drive Unit (Ref 27-81-00/201).
(2)
Light Aligner (If a light aligner is used.), LA-87,
J. C. Air, 400 Industrial Parkway, Industrial Airport, Kansas 66031, USA
B. References
(1)
24-22-00/201, Manual Control
(2)
27-81-00/201, Leading Edge Flap System
C. Access
(1) Location Zone
511 Leading Edge to Front Spar, Left
611 Leading Edge to Front Spar, Right
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MAINTENANCE MANUAL
Landing Light Adjustment
Figure 202
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G99951
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MAINTENANCE MANUAL
LOCATION OF THE LIGHT ALIGNER FOR THE LEFT OUTBOARD LANDING LIGHT (RIGHT OUTBOARD LIGHT IS SYMMETRICAL)
Landing Light - Adjustment with a Light Aligner Figure 203 (Sheet 1)
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747-400
MAINTENANCE MANUAL
LIGHT ALIGNER
LIGHT BEAM AFTER THE ADJUSTMENT (FRONT VIEW)
FOR THE INBOARD LANDING LIGHT 34 INCHES LESS
THAN THE HEIGHT OF THE LIGHT
FOR THE OUTBOARD LANDING LIGHT, 21 INCHES LESS THAN
THE HEIGHT OF THE LIGHT
Landing Light - Adjustment with a Light Aligner Figure 203 (Sheet 2)
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747-400 MAINTENANCE MANUAL
INBOARD LANDING
AIRPLANE NOSE GEAR
A TARGET IS A MARK OR AN OBJECT THAT IDENTIFIES A LOCATION ON THE GROUND
Landing Light - Adjustment with a Target Figure 204
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747-400 MAINTENANCE MANUAL
D. Procedure
S 862-124
(1) Prepare for the Light Beam Adjustment
NOTE: You can adjust the light beam with the Light Aligner or
____
with a Target.
(a)
Make sure the airplane and the test area are on level ground.
(b)
Make sure the airplane is approximately level.
WARNING: MAKE SURE THAT PERSONS AND EQUIPMENT ARE CLEAR OF THE LE
_______ AND TE FLAPS AND FLAP DRIVE MECHANISMS BEFORE YOU MOVE THE FLAP CONTROL LEVER. WITH HYDRAULIC POWER REMOVED, THE FLAPS WILL MOVE AUTOMATICALLY BY ELECTRICAL POWER WHEN YOU MOVE THE FLAP CONTROL LEVER. THIS CAN CAUSE INJURY TO PERSONS OR DAMAGE TO EQUIPMENT.
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