J. Remove bearings.
K. Remove telescoping duct door and seal from outer telescoping duct.
4. Remove Telescoping Duct at Slats 3 and 4 (Fig. 401)
A. Lower wing leading edge slats (Ref Chapter 27, Wing Leading Edge Slats).
B. Remove wing access panels as required to gain access to wing manifold on each side of telescoping duct to be removed (Ref Chapter 12, Wing Lower Surface Access Doors and Panels).
C. Remove forward engine Nacelle Fairing (Ref 54-51-11).
D. Remove applicable slat inner skin panel and outer telescoping duct access door.
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Feb 15/78 BOEING PROPRIETARY - Copyright . - Unpublished Work - See title page for details. 30-11-31 Page 401
E. Remove slat access panel on wing at each end of slat and remove spray duct retaining bolts (2 places) from each end of slat.
F. Withdraw spray duct to clear telescoping duct and spray duct bearing. Remove outer
telescoping duct.
G. Remove bearings.
H. Remove telescoping duct door and seal from outer telescoping duct.
I. Remove wing TAI supply duct connection and support clamps, as required to remove section of duct from inboard side of inner telescoping duct and remove duct section.
J. Remove duct mounting bolts and bearings on inboard side of inner telescoping duct.
K. Lower inner telescoping duct to clear structure and withdraw inner duct. If proper clearance to remove duct between leading edge angle details does not exist, modify leading edge angles (Ref 30-11-31, Approved Repairs).
L. Remove O-rings from inner duct tee.
5. Install Telescoping Duct Assembly at Slats 1, 2, 5 and 6 (Fig. 401)
A. Place bearings on each end of tee section of outer telescoping duct and insert assembly into support bracket inside slat. Insert slat spray duct from each end of slat.
B. Install spray duct retaining bolts (2 places) at each end of slat and access panel removed in step 3.H.
C. Install outer telescoping duct access door and slat inner skin doubler.
D. Install seal in end of outer telescoping duct and insert inner telescoping duct.
E. Install wing TAI supply duct O-rings on inner telescoping duct tee.
F. Position inner telescoping duct tee in wing leading edge and install duct bearings.
G. Position wing TAI supply duct section on each side of telescoping duct and install duct connection and support clamps.
CAUTION: TO PREVENT CHAFING, THE SLAT ACTUATOR DOWNLOCK HARNESS AND CLAMPS MUST BE POSITIONED AND INSTALLED TO AVOID INTERFERENCE WITH TELESCOPING DUCT (REF 27-81-21, REMOVAL/INSTALLATION).
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30-11-31 Page 402 BOEING PROPRIETARY - Copyright . - Unpublished Work - See title page for details. Feb 15/78
F88108 F88670 F88051
570 Wing Anti-Icing Telescoping Duct
Oct 20/86 Figure 401 (Sheet 1) 30-11-31
Page 403
BOEING PROPRIETARY - Copyright . - Unpublished Work - See title page for details.
Wing Anti-Icing Telescoping Duct 559
30-11-31 Figure 401 (Sheet 2) Jun 20/83
Page 404
BOEING PROPRIETARY - Copyright . - Unpublished Work - See title page for details.
570 Wing Anti-Icing Telescoping Duct Oct 20/86 Figure 401 (Sheet 3) 30-11-31 Page 404A/404B BOEING PROPRIETARY - Copyright . - Unpublished Work - See title page for details.
6. Install Telescoping Duct Assembly at Slats 3 and 4 (Fig. 401)
A. Install wing TAI supply duct O-rings on inner telescoping duct tee.
B. Position inner telescoping duct tee in wing leading edge and instal1 duct bearings.
C. Position wing TAI supply duct section on inboard side of telescoping duct and install duct connection and support clamps.
D. Install seal in end of outer telescoping duct and insert over inner telescoping duct. Torque cap nut to 250-370 pound-inches.
E. Place bearings on each end of tee section of outer telescoping duct and insert assembly into support bracket inside slat. Insert slat spray duct from each end of slat.
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