ENGINE-TO-WING MIDFAIRING - REMOVAL/INSTALLATION
1. Equipment and Materials
A. Grease - MIL-G-23827
2. Prepare for Removal
A. Remove engine per Chapter 71, Power Plant - Removal/Installation.
B. Remove forward engine mount per 54-41-11, Forward Engine Mount - Removal/Installation.
C. Remove aft engine vibration isolator per Chapter 71, Aft Vibration Isolator -Removal/Installation.
3. Remove Engine-to-Wing Midfairing (See figure 401.)
A. Break compound seals and aerodynamic smoother as necessary.
B. Disconnect engine equipment line couplings.
C. Remove nuts, washers and bolts securing aft ends of thrust links to wing.
D. Remove thrust links.
E. Remove midfairing skate angle fasteners, leading edge fasteners and aft bulkhead fasteners.
F. Remove midfairing.
4. Install Engine-to-Wing Midfairing (See figure 401.)
A. Attach midfairing to wing by installing skate angle fasteners, leading edge fasteners and aft bulkhead fasteners.
B. Grease thrust link bolts and bolt holes.
C. Install nuts, washers and bolts securing aft ends of thrust links to wing. Tighten nuts to within 630 to 950 inch-pounds.
D. Connect engine equipment line couplings.
E. Install compound seals and aerodynamic smoother per Chapter 51, Seals and Sealing.
May 15/68 54-51-41 Page 401 BOEING PROPRIETARY - Copyright . - Unpublished Work - See title page for details.
5. Restore Airplane to Normal
A. Check that overall dimension across flanges of flap track bushings is 4.72 (± 0.02) inches. Adjust bushings (using a wrench on each bushing) as required.
B. Install aft engine vibration isolator per Chapter 71, Aft Vibrator – Removal/Installation.
C. Install forward engine mount per 54-41-11, Forward Engine Mount – Removal/Installation.
D. Install engine per Chapter 71, Power Plant – Removal/Installation.
Engine-to-Wing Midfairing Installation 500
54-51-41 Figure 401 May 15/71
Page 402
BOEING PROPRIETARY - Copyright . - Unpublished Work - See title page for details.
