S 354-014
(6)
If you install a new tip, do the steps that follow:
(a) Cut the edges of the new tip.
NOTE: Make sure you have the correct clearance between the
____ tip skin and the horizontal stabilizer (View A-A, Fig. 401).
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747-400 MAINTENANCE MANUAL
(b)
Break the sharp edges of the skin you cut.
(c)
Apply a layer of clear Alodine (Ref 51-21-04/701).
S 434-018
(7) Install the fasteners loosely, then tighten evenly.
NOTE: Tighten the bolts in a sequence which will not cause the
____ skin to buckle.
S 224-015
(8)
Do a check of the skin wave tolerances (Fig. 401) (SRM 51-70-00).
S 214-016
(9)
Make sure the fastener heads are smooth with the leading edge skin.
NOTE:____ The maximum distance below the surface is 0.010 inch.
The maximum distance above the surface is 0.002 inch. Do not
cut the fastener heads to get the correct flushness.
S 344-011
(10)
Fill the clearance between the tip and the horizontal stabilizer with sealant (Ref 51-31-01/201).
S 374-020
(11)
Apply a layer of conductive coating to the middle fairing if it is necessary (Ref 51-24-03/701).
S 224-021
(12)
Measure the resistance of the conductive coating (Ref 51-24-03/701).
S 374-023
(13)
Repair the external finish of the tip if it is necessary (Ref 51-24-11/701).
S 864-024
(14)
Remove the placard from the stabilizer manual control if you attached one.
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S 864-025
(15)
Connect the electrical power (Ref 24-22-00/201).
S 864-026
(16)
Close these circuit breakers and remove the DO-NOT-CLOSE tags:
(a) P7 Overhead Circuit Breaker Panel.
1) 7E7 STAB TRIM L S/O VALVE
2) 7E20 STAB TRIM R S/O VALVE
S 864-027
(17) Put the STAB TRIM NO. 2 and NO. 3 switches on the control stand to the ON position.
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HORIZONTAL STABILIZER-TO-FUSELAGE SEAL (FORWARD) - REMOVAL/INSTALLATION
_______________________________________________________________________
1. General_______
A. This procedure contains two tasks. The first task is the removal of the horizontal stabilizer-to-fuselage seal. The second task is the installation of the horizontal stabilizer-to-fuselage seal.
B. The horizontal stabilizer-to-fuselage seal has an upper seal, a leading edge seal, a lower seal, and a vertical seal. The upper seal extends from the front spar to the leading edge. The leading edge seal extends around the leading edge. The lower seal extends from the leading edge to the front spar. The vertical seal is at the outrigger No. 3. The upper seal, leading edge seal, and lower seal are bonded together with an adhesive to keep a smooth continuous seal.
C. You can remove and install the seals separately.
TASK 55-10-03-004-001
2. Remove the Seals (Fig. 401)________________
A. References
(1)
24-22-00/201, Manual Control
(2) 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 安定门 STABILIZERS(7)
