G42699 G42722
505  Engine Attach Fittings 
Oct 20/92  Figure 1 (Sheet 1)  54-41-0 
Page 1 
BOEING PROPRIETARY - Copyright . - Unpublished Work - See title page for details. 

No. 2 Engine Mount Shown, No. 1 Opposite  500 
54-41-0  Engine Attach Fittings  Feb 20/87 
Page 2  Figure 1 (Sheet 2) 
BOEING PROPRIETARY - Copyright . - Unpublished Work - See title page for details. 

ENGINE ATTACH FITTINGS - INSPECTION/CHECK
1.  General
A.  This data consists of illustrations and wear limits charts, and procedures for inspection of forward engine mount support fittings. There will be no procedure given in the inspection for gaining access to, or removing and replacing the  component after inspection for wear. Refer to Component Removal/Installation for this information.
2.  Forward Engine Mount Support Fittings Inspection (Fig. 601)
A.  Remove engine per 71-00/401.
B.  Clean lower aft flange between vibration isolators, except under centerline fire detection bracket.
C.  Perform close visual inspection of all cleaned surfaces of lower aft flange, with special attention to edge radii on both sides of each thrust link lug.
D.  If cracks are found, replace fitting (Ref 54-41-11/401).
E.  If no cracks are found, install engine per 71-00/401, and repeat step C.
3.  Engine Attach Fittings Wear Limits (Fig. 601)

F59591 G42727
505  Engine Attach Fittings Wear Limits 
Oct 20/92  Figure 601 (Sheet 1)  54-41-0 
Page 601 
BOEING PROPRIETARY - Copyright . - Unpublished Work - See title page for details. 

No. 2 Engine Mount Shown, No. 1 Opposite  500 
54-41-0  Engine Attach Fittings Wear Limits  Feb 20/87 
Page 602  Figure 601 (Sheet 2) 
BOEING PROPRIETARY - Copyright . - Unpublished Work - See title page for details. 

500  Engine Attach Fittings Wear Limits 
Feb 20/87  Figure 601 (Sheet 3)  54-41-0 
Page 603 
BOEING PROPRIETARY - Copyright . - Unpublished Work - See title page for details. 

H26780
Engine Attach Fittings Wear Limits  500 
54-41-0  Figure 601 (Sheet 4)  May 01/03 
Page 604 
BOEING PROPRIETARY - Copyright . - Unpublished Work - See title page for details. 

500  Engine Attach Fittings Wear Limits 
May 20/82  Figure 601 (Sheet 5)  54-41-0 
Page 605 
BOEING PROPRIETARY - Copyright . - Unpublished Work - See title page for details. 

Engine Attach Fittings Wear Limits  500 
54-41-0  Figure 601 (Sheet 6)  Feb 20/86 
Page 606 
BOEING PROPRIETARY - Copyright . - Unpublished Work - See title page for details. 

FORWARD ENGINE MOUNT - REMOVAL/INSTALLATION
1.  Equipment and Materials
A.  Grease - MIL-G-23827 (AMM 20-30-21)
B.  Firewall Sealant -BMS 5-63 (AMM 20-30-11)
2.  Prepare for Removal
A.  Remove engine (AMM 71-00/401).
B.  Remove access panels 6301 (L.E.) (left side) or 6401 (L.E.) (right side).
3.  Remove Forward Engine Mount (Fig. 401)
A.  Break seals between firewall and forward engine mount.
B.  Remove detector support bracket from forward engine mount.
C.  Remove nuts, washers, and bolts securing forward ends of thrust links to forward engine mount.
D.  Remove cotter pin (outboard side), nut, washers, and bolt (2 locations) securing forward engine mount to wing. Tag each set of nut, washers, bushing (if removed), and bolt as an inboard set and an outboard set. Discard cotter pins.
E.  Remove forward engine mount.
F.  Remove swinging link by removing cotter pin, nut, washer, and bolt.
4.  Install Forward Engine Mount (Fig. 401)
A.  Check bolts and bolt holes for wear, and lower aft flange for cracks (AMM 54-41-0/601).
B.  Install the swinging link.
(1)  
Install the washer (2 locations) between the bushings (View C, Fig. 401).

(2)  
Install the bolt, washer, nut and new cotter pin.

(a)  
Install the nut finger-tight with the washer against the shoulder of the bolt. Make sure the washer and nut are not against the bushing face.

(b)  
Loosen the nut as needed to install the cotter pin.

C.  Place forward engine mount in position for insertion of attachment bolts.
　
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