747-400 AMM 飞机维护手册 飞行操纵 FLIGHT CONTROLS 6(4)

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 (33.3 mm) apart. 2) Install the tape adjacent to the fairing fitting with one mark aligned with the fairing fitting.
 3)  With the flaps retracted, you can measure the position of the flap track.
 (b)  
Make sure the clearance between the fairing and the bottom surface of the wing is in the tolerance shown in Section B-B, Fig. 402. 1) If the clearance is not in the tolerance, adjust the drive

 rod and the support fitting.

 (c)  
Attach the drive rod to the midflap fitting (Section E-E, Fig. 401): 1) Install the bushings in the midflap fitting. 2) Put the drive rod in the midflap fitting and install the

 bolt, washers and nut.
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747-400 MAINTENANCE MANUAL
 3)  Tighten the nut to 200-300 pound-inches (23-34 N-m). Continue to tighten the nut to align the subsequent cotter pin hole.
 4)  Install the cotter pin.
 (d)  
Make sure the clearance between the seal retainer and the bottom surface of the wing is in the tolerance shown on Section B-B, Fig. 402.

 (e)  
Tighten the checknuts on the rods and install the lockwire.

 S 864-049
 (2)  Do this task to pressurize hydraulic system No. 4: "Hydraulic System Pressurization" (Ref 29-11-00/201).
 S 714-065
 CAUTION:_______MONITOR THE FLAP MOVEMENT CAREFULLY. THE FLAPS CAN BE DAMAGED BY INCORRECTLY ADJUSTED COMPONENTS.
 (3)  Extend and retract the flaps. (a) Make sure the fairings move correctly.
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 (4)  Put the flap control lever in the UP detent to retract the flaps.
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 (5)  Adjust the clearance between the seal retainer and the bottom surface of the wing: (a) Make sure the clearance between the seal retainer and the flap is in the limits.
 (b)  If the clearance is not in the tolerance, extend the flaps and adjust the seal.
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 (6)  Put the flap control lever in the 30-unit position to extend the flaps.
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 (7)  Adjust the doors on fairings No. 1 and 8: (a) Adjust the forward door link to its maximum length. (b) Install the forward door link (Section G-G, Fig. 401): 1) Install the bushings in the forward door link. 2) Put the forward door link on the adjustable rod and install the bolt, washers and nut. 3) Tighten the nut to 30-40 pound-inches (3-5 N-m). Continue to tighten the nut to align the subsequent cotter pin hole. 4) Install the cotter pin.

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747-400 MAINTENANCE MANUAL
 (c)  
Put the flap control lever in the UP detent to retract the flaps.

 (d)  
Adjust the forward door link until you align the secondary door with the fairing, if it is necessary.

 NOTE: Do not turn the forward door link more than 1/2 turn.
____ The bulb seal on the forward edge of the door must touch the aftflap.
 Do not adjust the forward door link if there is not clearance between the seal and the aftflap.
 (e)  
Tighten the locknuts.

 (f)  
Install the lockwire on the locknuts.

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 (8)  
Extend and retract the flaps.

 (a)  
Make sure the fairing moves smoothly.

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 (9)  
Put the flap control lever in the UP detent to retract the flaps.

 S 864-055

 (10)
 Do this task to depressurize hydraulic system No. 4:  "Hydraulic System Depressurization" (Ref 29-11-00/201).

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 (11)
 Install the applicable access panels: 567BB, 567CB, 567DB, and 567EB on track No. 1 565BB, 565CB, 565DB, and 565EB on track No. 2 665BB, 665DB, 665DB, and 665EB on track No. 7 667BB, 667CB, 667DB, and 667EB on track No. 8.

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