500 Fixed Fairing Installation
Nov 15/67 Figure 401 (Sheet 2) 71-11-21
Page 403
BOEING PROPRIETARY - Copyright . - Unpublished Work - See title page for details.
B. Position fixed fairings at six fixed fairing support brackets on engine. Check that hydraulic hose clearance exists between fan duct and fixed fairing.
C. Install fasteners as indicated in Fig. 401 noting that bolt orientations and type of fasteners differ at each location. Tighten each locknut to torque of 50 to 70 pound-inches.
D. Connect drain hose to left half of fixed fairing.
E. Ensure that separator block rub strip on engine control push-pull cables (approximately 7-1/2 inches below upper cable attachment brackets) is positioned to prevent direct contact between fixed fairing and push-pull cables.
5. Restore Airplane to Normal Configuration
A. Install the mid-fairing doors 5154, 5126 (left engine) or 5254, 5226 (right engine)
(Ref 12-31-91/201).
B. Install engine-to-wing forward fairing (Ref 54-51-11/401).
C. Install side removable cowl panels.
501
71-11-21 Page 404 BOEING PROPRIETARY - Copyright . - Unpublished Work - See title page for details. Feb 20/93
ENGINE NOSE COWL - REMOVAL/INSTALLATION
1. Prepare Engine Nose Cowl for Removal
A. Remove left and right removable cowl panels (Ref 71-11-11).
B. Remove engine-to-wing forward fairing (Ref Chapter 54, Engine-to-Wing Forward Fairing).
C. Remove engine fixed fairing (Ref 71-11-21).
2. Remove Engine Nose Cowl (Fig. 401)
A. Disconnect nose cowl thermal anti-icing duct at 5 o'clock position near duct penetration into nose cowl by backing off coupling nut and removing connecting ring from joint. Retain connecting ring for reinstallation.
B. Manually support nose cowl and remove 23 attach bolts and washers. Pull cowl forward to remove from engine. Ensure that nose cowl is clear of engine nose dome before lowering.
WARNING: NOSE COWL WEIGHS APPROXIMATELY 120 POUNDS.
3. Install Engine Nose Cowl (Fig. 401)
A. Check that locking torque value of Heli-coil screw-lock insert in engine flange is 6.5 to 60 pound-inches (Ref PW MM 70-00 Standard Practices). If torque value is not within the above limits replace bolt and/or Heli-coil screw-lock insert.
B. Using care to clear engine nose dome, manually position nose cowl against engine flange and install 23 attach bolts and washers.
WARNING: NOSE COWL WEIGHS APPROXIMATELY 120 POUNDS.
C. Tighten all attach bolts. Provide support for nose cowl as necessary during bolt tightening. (Tighten bolts in near opposite pairs.)
D. Connect nose cowl thermal anti-icing duct at 5 o'clock position near duct penetration into nose cowl by installing connecting ring in joint, and engaging and tightening coupling nut.
4. Restore Airplane to Normal Configuration
A. Install engine fixed fairing (Ref 71-11-21).
B. Install engine-to-wing forward fairing (Ref Chapter 54, Engine-to-Wing Forward Fairing).
C. Install left and right removable cowl panels (Ref 71-11-11).
540
Feb 01/95 BOEING PROPRIETARY - Copyright . - Unpublished Work - See title page for details. 71-11-31 Page 401
Nose Cowl Installation 540
71-11-31Page 402 Figure 401 BOEING PROPRIETARY - Copyright . - Unpublished Work - See title page for details. Jun 20/85
5. Restore Airplane to Normal Configuration
A. Install engine fixed fairing (Ref 71-11-21).
B. Install engine-to-wing forward fairing (Ref Chap 54).
C. Install left and right removable cowl panels (Ref 71-11-11).
76. Remove Engine Gravel Deflector Boom (Fig. 401)
A. Support deflector boom and remove four screws securing support strut to bottom of nose cowl at forward end of tube.
B. Remove eight screws securing boom to nose cowl at aft end of boom. Retain gasket seal.
C. Position seal around deflector air opening. Secure seal and cover opening by installing coverplate using existing screws.
7. Install Engine Gravel Deflector Boom
NOTE: Check to ensure boom is free of any internal obstructions prior to installation.
A. Remove screws from coverplate at aft end of nose cowl. Retain screws and gasket seal. Store coverplate for future use.
B. Position seal around deflector air opening. Secure seal by placing deflector boom in position to be installed on bottom of cowl.
C. Secure deflector boom to nose cowl by installing eight screws at aft end of tube and four screws at forward support strut.
5A5
Feb 20/85 BOEING PROPRIETARY - Copyright . - Unpublished Work - See title page for details. 71-11-31 Page 403
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