ú CAUTION:_______USE ONLY NONMAGNETIC BOLTS HEAT TREATED TO 160,000 PSI ALONG THE TOP, BOTTOM, AND FORWARD EDGES OF THE WINDOW. THIS IS BECAUSE THEY ARE CLOSE TO THE STANDBY COMPASS. THE BOLTS THAT ATTACH THE WINDOW RETAINING ANGLE AT THE AFT EDGE ARE NOT STANDARD. YOU MUST ONLY INSTALL BOLTS THAT ARE THE SAME AS THE ONES REMOVED AT THE AFT EDGE. YOU MUST TIGHTEN THE BOLTS TO THE SPECIFIED TORQUE OR YOU CAN CAUSE DAMAGE TO THE WINDOW.
(a)
Apply the corrosion preventive compound to the retaining bolt shanks immediately before the installation.
(b)
Install retaining bolts in the same position they were removed from (Refer to the IPC 56-11-11-01 for the new parts and their locations).
NOTE: Two thin electrical hex nuts hold the bolts in the top
____ and the lower aft corners. The second nut acts as a checknut (not on all airplanes).
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56-11-11
ALL ú ú B04.1 Page 409 ú Jul 12/02
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A 737-300/400/500MAINTENANCE MANUAL
(c) Install the aluminum spacer (14), the seal washer (15), and the aluminum washer (16) on the bolts in the top and the lower aft corners.
NOTE: The seal washer is made of silicone rubber.
____
(d)
Temporarily install the hex nut (18) and the self-locking nut (17) finger tight on the top and the lower aft retaining bolts.
(e)
Install the aluminum spacer (2), the O-rings (4) and the flat washers (5) on the applicable retaining bolts (3).
(f)
Install the wire clamps (7) where they were installed before the removal.
(g)
Temporarily install the self-locking hex head nuts (6 and 23) finger tight.
NOTE: The NAS679C(-)W nuts are low permeability (nonmagnetic).
____
S 434-029-B00
(5) Install all the retaining angle bolts (11).
NOTE: To install the retaining angle bolts that attach the
____ retaining angle and the doubler on the aft edge, open the adjacent sliding window. Install these bolts first before you tighten the bolts that are finger tight. This will permit you to move the bolt to align the window correctly and for the installation of the other bolts.
(a) Tighten all the retaining angle bolts slowly while you adjust the window in the frame.
NOTE: You must tighten the bolts in the range of 72 to 88
____ pound-inches. You must make sure to keep the minimum dimension between the the bolt ends and the window pane (Fig. 401, detail B and section C-C).
S 434-030-B00
(6) Tighten all the bolts in the corners.
S 434-031-B00
CAUTION: YOU MUST KEEP THE MINIMUM DIMENSION BETWEEN THE RETAINING ANGLE
_______ BOLTS AND THE WINDOW PANE. YOU CAN CAUSE A CRACK IN THE INNER PANE OF THE WINDOW IF YOU DO NOT KEEP THE CORRECT DIMENSION.
(7) Install all the window bolts (3 and 21).
(a) First tighten all the nuts finger tight.
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ALL ú ú B05 Page 410 ú Jul 12/00
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
737-300/400/500MAINTENANCE MANUAL
(b)
In bolt locations using nut plates that follow, snug down and then final torque in the sequence shown in (Fig. 402): 1) Tighten the 3/16 inch diameter nuts to 20-25 pound-inches
(Fig 401 detail A). 2) Tighten the lower 3/16 inch diameter nut to 20-25 pound-inches, 40 pound-inches maximum (Fig 401 detail C). 3) Tighten the 1/4 inch nuts to 50-70 pound inches (Fig 401 details A and D). 4) Tighten the upper 1/4 inch nut to 50-70 pound-inches (Fig 401 detail C).
(c)
When any bolt is to be installed by wrenching the head, such as when installing bolts into plate-nuts, clip-nuts, barrel-nuts, inserts, or tapped holes, the maximum installation torque for the 3/16 inch bolt shall be 20-25 pound-inches with a maximum torque of 40 pound-inches plus; and the torque for the 1/4 inch bolt shall be 50-70 pound-inches with a maximum torque of 70 pound-inches.
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