55-30-02
ALL ú ú 01 Page 402 ú Jun 10/94
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
747-400
MAINTENANCE MANUAL
(2) Rivets - BACR15CE5D (or equivalent)
B. Consumable Materials
(1)
C00064 Alodine 1000 (clear)
(2)
A00247 Sealant, BMS 5-95
C. References
(1)
20-22-01/601, Electrical Bonding
(2)
51-21-04/701, Alodized Surfaces
(3)
51-31-01/201, Seals and Sealing
(4)
IPC 55-30-04 Fig. 1
D. Access
(1) Location Zone
327 Fin Tip
E. Procedure
S 434-006
(1)
Remove the cover from the closure rib and equipment.
S 214-007
(2)
Examine the rib splice between the leading edge and the fin tip.
(a) If there is damage, repair or replace the splice rib.
S 214-008
(3) Examine the nutplates and screws that attach the fin tip to the fin.
(a)
Replace the damaged nuts and screws.
(b)
Tighten the loose nutplates with new rivets.
S 424-009
(4)
Put the fin tip in the correct position.
S 434-021
(5)
Install the fasteners around the edge of the fin tip.
S 354-010
(6)
If you install a new fin tip, do the steps that follow:
(a) Cut the lower edge of the fin tip skin.
NOTE: Make sure you have the correct clearance between the
____ lower edge of the fin tip and the fin (View A-A, Fig. 401).
EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú
55-30-02
ALL ú ú 01 Page 403 ú Oct 10/95
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
747-400 MAINTENANCE MANUAL
(b) Break the sharp edges of the cut skin.
(c) Apply a layer of clear alodine (Ref 51-21-04/701).
S 434-028
(7) Install the fin tip.
S 224-012
(8) Do a resistance check between the fin leading edge and the forward
end of the fin tip.
NOTE:____ The maximum permitted resistance is 0.0005 ohm
(Ref 20-22-01/601).
S 224-025
(9) Do a resistance check between the fixed trailing edge and the aft end of the fin tip.
NOTE: The maximum permitted resistance is 0.0005 ohm
____ (Ref 20-22-01/601).
S 224-026
(10) Do a resistance check between the forward end of the diverter strip and the forward end of the fin tip.
NOTE: The maximum permitted resistance is 0.0005 ohm
____ (Ref 20-22-01/601).
S 224-027
(11) Do a resistance check between the aft end of the diverter strip and the aft end of the fin tip.
NOTE: The maximum permitted resistance is 0.0005 ohm
____ (Ref 20-22-01/601).
S 124-023
(12) If the resistance is more than 0.0005 ohm between the given surfaces, do the steps that follow:
(a) Use a wire brush made of stainless steel to clean the mating surfaces.
EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú
55-30-02
ALL ú ú 01 Page 404 ú Oct 10/95
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
747-400 MAINTENANCE MANUAL
(b) Do a resistance check again. S 224-014
(13) Make sure the fastener heads are smooth with the fin tip 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 224-015
(14) Do a resistance check between the diverter strips on the side of the fin and either the forward or the aft edge of the fin tip.
NOTE: The maximum permitted resistance is 0.010 ohm.
____
S 124-024
(15) If the resistance is more than 0.010 ohm, do the steps that follow:
(a)
Remove the fasteners.
(b)
Clean the mating surfaces of the fasteners and diverter strips.
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(24)
