S 864-093
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747-400 MAINTENANCE MANUAL
OUTBOARD AFTFLAP DRIVE MECHANISM - INSPECTION/CHECK
___________________________________________________
1. General_______
A. There is one task in this procedure; an inspection of the parts of the outboard aftflap drive mechanism. The parts include bushings, bolts, bearings, screws, and the hook of the geneva cam.
B. You usually do this procedure before you install a component of the drive mechanism. To do the inspection, you must remove the part from the airplane.
TASK 27-51-40-206-001
2. Outboard Aftflap Drive Mechanism Inspection___________________________________________
A. Standard Tools and Equipment
(1)
Micrometer - O to 1 inch
(2)
Micrometer - 1 to 2 inch, To Measure Inner Dimensions
(3)
Micrometer - 1 to 2 inch, To Measure Outer Dimensions
(4)
Vernier Caliper
B.
References
(1)
27-51-40/401, Outboard Aftflap Drive Mechanism
C.
Access
(1)
Location Zone 567 Outboard Flap Track Fairing, Outboard Flap, LH, (Track No. 1) 565 Inboard Flap Track Fairing, Outboard Flap, LH, (Track No. 2) 665 Inboard Flap Track Fairing, Outboard Flap, RH, (Track No. 7)
667 Outboard Flap Track Fairing, Outboard Flap, RH, (Track No. 8)
D. Procedure
S 026-002
(1)
Do this task to remove the component from the aftflap drive mechanism: "Outboard Aftflap Drive Mechanism Removal" (Ref 27-51-40/401).
S 226-003
(2)
Examine the parts of the aftflap drive mechanism for worn areas:
(a)
Remove the parts.
(b)
Use a micrometer or a vernier caliper to measure the parts.
(c)
Compare the dimensions you measured with the permitted dimensions shown in Fig. 601.
(d)
Repair or replace the parts that are not in the tolerance.
(e)
Install the parts.
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747-400 MAINTENANCE MANUAL
S 426-004
(3) Do this task to install the component on the aftflap drive mechanism: "Outboard Aftflap Drive Mechanism Installation" (Ref 27-51-40/401).
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747-400
MAINTENANCE MANUAL
Outboard Aftflap Drive Mechanism Wear Limits
Figure 601 (Sheet 1)
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747-400
MAINTENANCE MANUAL
MIDFLAP PUSHROD AFT BOGIE A G G C C BSEESPRING CARRIAGE FITTING UPSTOP GENEVA CAM SUPPORT AFT ROLLER OUTBD FWD D D F B E E F
PUSHROD
MIDFLAP
A
CRANK MIDFLAP DRIVE ROD FAIRING
A
AFTFLAP ROD ACTUATOR B B FWD
FITTING AFTFLAP C OUTBD
Figure 601 (Sheet 2) Outboard Aftflap Drive Mechanism Wear Limits
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