NOTE: Twenty hour cure time is for the usual conditions of
____ 77 |5°F (25 |1°C) and 50 |5% relative humidity. The cure time can be made faster with a heat gun. Do not use warm air that is more than 120°F [50°C]) on the sealant. You can also increase the temperature of the mating surfaces before the sealant is applied.
S 414-016-C00
(10) Close the fan cowl panel (Ref 71-11-02/201).
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71-11-08
ALL ú ú C01 Page 404 ú Jul 15/96
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
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CFM56 ENGINES
737-300/400/500/ /MAINTENANCE MANUAL ////////////////////////
ENGINE MOUNTS - DESCRIPTION AND OPERATION
_________________________________________
1. General
_______
A. The forward and aft engine mounts support the engine at three points. The forward mount consists of two attach points on the fan frame, and two thrust links that attach at the fan frame mid box structure and are secured at a point on the strut. The aft mount consists of one attach point on the turbine frame.
2. Forward Engine Mount (Fig. 1)
____________________
A. The forward engine mount provides suspension of the engine through two cone bolts attached to fan case fittings bolted to pads on the fan frame. On engines without forward mount vibration isolators, the left cone bolt mates with one end of a cross beam and the right cone bolt mates with a cross pin located in the other end of the cross beam. On engines with forward mount vibration isolators, the left and right cone bolts mate with vibration isolators located on each end of a cross beam. The cross beam is bolted to fittings on the strut and is secured to the cone bolts with tension nuts.
B. Engine thrust is transmitted through two thrust links attached at the forward ends to thrust link fittings bolted to the fan frame mid box structure at the 10 and 2 o'clock positions. The aft ends of the thrust links are attached to an evener bar which in turn is connected through bushings and a shoulder bolt to a thrust fitting attached to the underside of the strut. A failsafe fitting is provided in the event of a thrust link failure.
3. Aft Engine Mount (Fig. 1)
________________
A. The aft engine mount provides suspension of the engine through a single cone bolt which is part of an isolator assembly located on the underside of the strut. Two links connect a hanger fitting to lugs integral with the turbine frame. The hanger fitting is secured to the cone bolt by a silver plated tension nut.
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71-21-00
ALL ú ú C01 Page 1 ú Feb 25/86
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
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CFM56 ENGINES
737-300/400/500/ /MAINTENANCE MANUAL ////////////////////////
FORWARD MOUNT
THRUST LINKS STRUT
FAN DUCT COWL AND THRUST REVERSER
AFT MOUNT
FORWARD MOUNT THRUST LINK ASSEMBLY
SEE A
STRUT
WEDGE SURFACE
VERTICAL
DEFLECTOR
SUPPORT BRACKET
(2 LOCATIONS)
EVENER BAR
A
Engine Mount Location Figure 1
BARREL NUT (5 LOCATIONS)
FAIL-SAFE FITTING
THRUST
FITTING
WASHER (5 LOCATIONS)
BOLT (5 LOCATIONS)
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71-21-00
ALL ú ú C01 Page 2 ú Nov 15/91
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
////////////////////////A / /
CFM56 ENGINES
737-300/400/500/ /MAINTENANCE MANUAL ////////////////////////
ENGINE MOUNTS - INSPECTION/CHECK
________________________________
1. General
_______
A. This procedure has one task to examine the engine mounts for worn areas and damage.
B. It is necessary to remove the power plant (AMM 71-00-02/401) for this inspection.
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