TASK 53-12-12-400-801
3. Stringer Beam Link Installation
(Figure 401)
A. General
(1) This task includes the steps to install the S18A beam links found at STA 663.75, L/RBL 66, WL
199.
B. References
Reference Title
25-21-46-400-801 Sidewall Panel - Installation (P/B 401)
25-22-00-400-802 Passenger Seat - Installation (P/B 401)
29-11-81-400-801 EDP Supply Shutoff Valve Installation (P/B 401)
53-21-00-400-801 Passenger Cabin Floor Panel - Installation (P/B 401)
SRM 51-40-02-0G-0 Lockbolts and Hex-Drive Bolts
C. Consumable Materials
Reference Description Specification
A00247 Sealant - Pressure And Environmental -
Chromate Type
BMS5-95
B00065 Alcohol - Denatured, Ethyl (Ethanol) AMS 3002 (Supersedes
O-A-396)
G00034 Cotton Wiper - Process Cleaning Absorbent
Wiper (Cheesecloth, Gauze)
BMS15-5 Class A
D. Location Zones
Zone Area
133 Main Landing Gear Wheel Well, Body Station 663.75 to Body Station 727.00 - Left
134 Main Landing Gear Wheel Well, Body Station 663.75 to Body Station 727.00 - Right
230 Subzone - Passenger Compartment - Body Station 360.00 to 663.75
E. Prepare for the Installation
SUBTASK 53-12-12-100-001
(1) Do these steps if the aft fitting [13] was removed:
(a) Clean the mating surfaces of the fitting [13] and the spar frame [16] with a cotton wiper,
G00034, wet with alcohol, B00065.
(b) Dry the surfaces with a clean, dry cotton wiper, G00034 before the solvent dries.
F. Forward Link Installation
SUBTASK 53-12-12-420-001
(1) From the passenger compartment, put the link [1] in its position on the fittings.
(a) Install the bolt [2], bolt [3], washers [4], bushing [5], bushing [6], washers [7] and nuts [8]
that attach the link [1] to the fitting [14] and fitting [15].
(b) Torque the fasteners 400 ±100 in-lb (45 ±11 N·m)
1) May torque from the head side.
2) When torqued from the head side, use a torque setpoint of 500 in-lb (56 N·m).
G. Aft Link Installation
SUBTASK 53-12-12-420-002
(1) Do these steps to install the aft fitting [13]:
737-600/700/800/900
AIRCRAFT MAINTENANCE MANUAL
53-12-12
Page 405
D633A101-ILF Oct 15/2019
ECCN 9E991 BOEING PROPRIETARY - Copyright © Unpublished Work - See title page for details
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