SUBTASK 30-11-31-420-001
(2) Assemble the telescoping duct seal.
(a) Put grease, D00013 on the inside diameter of the outer duct assembly.
(b) Put the retainer [9], back up rings [2], seal [8], ring [7], and cap nut [4] on the inner
telescoping duct [1].
NOTE: See (Figure 401) for the correct sequence.
(c) Tighten the cap nut [4] to 250.0 in-lb (28.2 N·m) to 370.0 in-lb (41.8 N·m).
(d) Put lockwire [3] on the cap nut [4] (Lockwire, Cotter Pins, and Lockrings - Installation,
TASK 20-10-44-400-801).
SUBTASK 30-11-31-420-008
(3) Install the o-ring [11], o-rings [12], or o-ring [13], as necessary, on the swivel joint of the inner
telescoping duct [1].
NOTE: You can use silicone compound, D00254, on the o-rings to make installation easier.
(4) Do this to install the inner telescoping duct [1]:
(a) Put the bearing [10] and bearing [14] on the ends of the inner telescoping duct [1].
(b) Put the inner telescoping duct [1] into position.
(c) Install the bolts [16] and washers [15].
NOTE: Do not tighten the bolts [16] until after the supply duct [6] is installed.
(5) Do this to install the supply duct [6]:
(a) Clean the mating surfaces of the supply duct [6] tab and the support assembly (SWPM
20-20-00).
1) Use a cotton wiper, G00034, made moist with alcohol, B00130.
2) Immediately dry the surfaces with a new cotton wiper.
(b) Apply a bead of sealant, A50231, along the top edge of the support assembly and the
bearings.
(c) Put the supply duct [6] into position.
(d) Install the bolts [17], bolts [18] and washers [15].
(e) Tighten the bolts [16], bolts [17] and bolts [18].
(f) Do a bonding check from the supply duct [6] tab to the support assembly.
1) Use an intrinsically safe approved bonding meter, COM-1550, to measure a
maximum of 0.00070 ohms (0.70 milliohms).
(g) Fillet seal the supply duct [6] tab with sealant, A50231.
(h) Position the clamps [5] so that there is a clearance of at least 0.2 in. (5.1 mm) from any
adjacent structure and install the clamps [5].
I. Wing Anti-Ice Telescoping Duct Seal Installation Test
SUBTASK 30-11-31-710-001
(1) Do this task: Wing Anti-Icing Duct - Leak Test, TASK 30-11-00-790-801.
J. Put the Airplane Back to Its Usual Condition
SUBTASK 30-11-31-410-008
(1) Install these panels per Leading Edge Access Panel Installation, TASK 57-41-02-400-801, as
needed:
737-600/700/800/900
AIRCRAFT MAINTENANCE MANUAL
30-11-31
Page 433
D633A101-ILF Jun 15/2019
ECCN 9E991 BOEING PROPRIETARY - Copyright © Unpublished Work - See title page for details
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