(3)
Put the speed brake control lever in the DOWN detent to lower spoilers No. 5 thru 8 above the inboard flaps.
S 225-039
(4)
Do a check of the clearance between the spoilers trailing edge and the top surface of the midflap.
NOTE: The airplane must be on its landing gear.
____
(a) Make sure that the minimum clearance between the spoiler trailing edge and the midflap is in the limits on section E-E, Fig. 503.
S 835-040
(5) If the clearance is out of the tolerance, adjust the spoilers, refer to 27-61-00/501 and 27-62-00/501.
EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú
27-51-01
ALL ú ú 02 Page 518 ú Jun 18/00
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
747-400 MAINTENANCE MANUAL
L. Do a Check of and Adjust the Aftflap
NOTE: The flaps must be extended for access if adjustment of these
____
dimensions is necessary.
S 865-079
CAUTION:_______MONITOR THE FLAP MOVEMENTS CAREFULLY. THE FLAPS CAN BE DAMAGED BY INCORRECTLY ADJUSTED COMPONENTS.
(1)
Make sure that the flaps are fully retracted.
S 835-047
(2)
Make sure that the movable fairings are correctly adjusted
(Ref 27-51-26/501).
S 225-048
CAUTION:_______ADJUST THE AFTFLAP ACTUATOR RODS (AFT RODS) ONLY. THE NECESSARY DIMENSION MUST BE IN THE LIMITS AT THE TWO ENDS OF THE FLAP TO PREVENT FLAP DAMAGE.
THE PUSHRODS (FORWARD RODS) MUST BE KEPT AT THE LENGTH SHOWN IN SECTION F-F TO PREVENT ROD LOADS THAT ARE TOO HIGH. THE PUSHRODS CAN BE DIFFERENT FROM THE SPECIFIED LENGTH ONLY WHEN THE ACTUATOR RODS CANNOT BE ADJUSTED TO THE 6.15-6.35 INCH (15.62-16.13 CM) DIMENSION. IF THE LENGTH OF THE PUSHRODS IS CHANGED, IT MUST BE THE SAME ON THE TWO PUSHRODS.
(3)
Make sure that the aftflap to midflap dimension is 6.15-6.35 inch (15.62-16.13 cm) at the two ends of the flaps (Fig. 503, sect. C-C).
S 835-049
(4)
If the dimension is out of the tolerance, adjust the actuator rods (aft rods) only.
S 225-050
(5)
Make sure that the midflap seal between the midflap trailing edge and aftflap is adjusted as shown on section C-C, Fig. 503.
(6)
If the seal is out of the tolerance, adjust the seal retainer.
S 825-051
EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú
27-51-01
ALL ú ú 02 Page 519 ú Jun 18/00
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
747-400 MAINTENANCE MANUAL
(7) S 225-052Make sure that the clearance between the midflap trailing edge and the aftflap top surface, at the supports only, is as shown in section C-C, Fig. 503.
(8) S 825-053Add or remove aluminum shims to adjust the clearance.
(9) S 435-054If a new midflap was installed, install the closure rib panel at the trailing edge. (a) Set the closure rib on the midflap. (b) Drill the necessary holes. (c) Attach the closure rib to the midflap with rivets.
S 285-055
(10)
After adjustment, make sure that the screws do not touch the aftflap when it is fully retracted.
S 285-056
(11)
Make sure that the actuator rod ends are in a safe position and are locked.
S 865-057
(12)
Pressurize hydraulic system No. 4 (Ref 29-11-00/201).
S 715-058
(13)
Operate the flaps slowly.
(a)
Make sure that the flaps move freely.
(b)
Make sure that the aerodynamic seals are engaged.
S 865-067
(14)
Retract the flaps.
S 865-074
(15)
Release the pressure in hydraulic system No. 4 (Ref 29-11-00/201).
S 225-059
(16)
Make sure that the clearance between the midflap trailing edge and the aftflap top surface is as shown on section C-C, Fig. 503.
(a)
Add or remove aluminum shims to adjust the clearance.
EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú
中国航空网 www.aero.cn
航空翻译 www.aviation.cn
本文链接地址：747-400 AMM 飞机维护手册 飞行操纵 FLIGHT CONTROLS 4(82)
