C.
Access
(1)
Location Zone
512 Krueger Flap Inboard, LH
513 Krueger Flap Midflap, LH
514 Krueger flap Outboard, LH
612 Krueger Flap Inboard, RH
613 Krueger Flap Midflap, RH
614 Krueger flap Outboard, RH
D.
Procedure
S 026-002
(1)
Do this task: "Krueger Flap Removal" (AMM 27-81-01/401).
S 226-003
(2)
Examine the krueger flaps (Fig. 601):
(a)
Remove the parts to be examined.
(b)
Use a micrometer to measure the dimensions of these parts.
(c)
Compare the part dimensions to the limit dimensions.
(d)
If the part dimension is out of tolerance, replace the part.
(e)
Install all the parts removed to do the check.
(3)
Do this task: "Krueger Flap Installation" (AMM 27-81-01/401).
S 426-004
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MAINTENANCE MANUAL
DRIVE
SHAFT A DRIVE
UNIT
ROTARY
ACTUATOR
(2 LOCATIONS)
ACTUATOR
LINK
(2 LOCATIONS)
F
A F
KRUEGER
FLAP
DRIVE
SHAFT
C
KRUEGER C
FLAP
B
B
DE
D
E
A-A
Krueger Flaps Wear Limits
Figure 601 (Sheet 1)
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MAINTENANCE MANUAL
Krueger Flaps Wear Limits
Figure 601 (Sheet 2)
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A 747-400 MAINTENANCE MANUAL
13. BUSHING/BOLT (2 LOCATIONS)
11. BUSHING/BUSHING (2 LOCATIONS)
10. BUSHING/BOLT
(2 LOCATIONS)
F-F
Krueger Flaps Wear Limits
Figure 601 (Sheet 3)
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MAINTENANCE MANUAL
INDEX NO. PART NAME DIM. DESIGN LIMITS WEAR LIMITS REPLACE PART WORN REPAIR WORN PART REPAIR INSTR
DIAMETER WEAR PER-DIM. MITTED DIA MAX CLEAR-ANCE
MIN MAX
1 BEARING ID 0.7495 0.7500 0.7540 0.0050 X
BOLT OD 0.7480 0.7490 0.7445 X
2 BUSHING ID 0.7495 0.7505 0.7540 0.0050 X
BOLT OD 0.7480 0.7490 0.7445 X
3 BEARING ID 0.4995 0.5000 0.5045 0.0050 X
BOLT OD 0.4985 0.4995 0.4945 X
4 BUSHING ID 0.4995 0.5005 0.5055 0.0060 X
BOLT OD 0.4985 0.4995 0.4935 X
5 BUSHING ID 0.4995 0.5010 0.5055 1 0.0060 X
BOLT OD 0.4985 0.4995 0.4935 X
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