Strut Forward Fairing Installation
Figure 401 (Sheet 4)
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F29995
A
747-400
MAINTENANCE MANUAL
6. BOLT
4. WASHER
NO. 4 FORWARD FAIRING OUTBOARD STRUT (OUTBOARD SIDE)
LEFT INBOARD STRUT
RIGHT OUTBOARD STRUT
Strut Forward Fairing Installation Figure 401 (Sheet 5)
F29985
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747-400 MAINTENANCE MANUAL
(b)
Remove the four bolts (15).
(c)
Remove the four bolts (6).
(d)
Remove the four bolts (13).
(e)
Remove the four bolts (13).
(f)
Remove the 34 bolts (14).
(g)
Remove the No. 3 forward fairing (10), (11), or (12).
S 004-026
(4) Do these steps to remove the inboard No. 4 forward fairing (17):
(a)
Remove the four bolts (6).
(b)
Remove the 64 bolts (7).
(c)
Remove the inboard No. 4 forward fairing (17).
S 004-027
(5) Do these steps to remove the outboard No. 4 forward fairing (18) or (19):
(a)
Remove the nine bolts (6).
(b)
Remove the 64 bolts (7).
(c)
Remove the outboard No.4 forward fairing (18) or (19).
TASK 54-62-04-404-028
3. Forward Fairing Installation (Fig. 401)____________________________
A. References
(1) WDM 20-20-00, Electrical Bonding and Grounding
B. Procedure
S 404-036
(1) Do these steps to install the forward fairing No. 1 (strakelet).
(a)
Put the No. 1 fairing (strakelet) in place and align the attach holes.
(b)
Bonding areas are the locations of the six (6) fastener bolts BACB30LR2-4.
(c)
Remove primer down to the black anti-static coating under the BACW10U-C81P washer (excluding countersink).
(d)
Apply BMS 10-21 Type 1 anti-static coating to the countersinks.
(e)
After assembly measure the resistance between the bolt and adjacent structure. Maximum resistance is 0.01 OHMS.
(f)
Shim the assembly as required (BACS40R laminate shim) to achieve flushness. Install shims with BMS 10-11 Type I.
(g)
Attach the cover panel assembly with fasteners (18 locations) and fill the countersinks with PRO SEAL 860 Class B (or equivalent), or BMS 5-95 to meet smoothness requirements.
(h)
After installation of the panel, do a check of the resistance of the conductive antistatic finish. Maximum resistance of 300,000 OHMS is allowed.
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MAINTENANCE MANUAL
S 404-029
(2) Do these steps to install the No. 2 forward fairing (1):
(a) Make sure a washer (4) is installed in 10 holes.
(b) Put the No. 2 forward fairing (1) in its position on the strut.
(c) Install the three bolts (9).
(d) Install the two bolts (8).
(e) Install the six bolts (6).
(f) Install the four bolts (3).
(g) Install the four bolts (5).
(h) Install the 11 bolts (2).
(i) Install the 66 bolts (7).
S 404-030
(3) Do these steps to install the No. 3 forward fairing (10), (11), or
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