Forward Engine Mount
Figure 402/TASK 71-21-11-991-301
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(a) Clean the bolts (5), (20), washers (10), (25), (65), nuts (50), (60), and retainers (15), (70). Use a cloth moist with trichlorethylene (Material No. CP1008). Wipe the parts dry before the solvent becomes a gas.
(11) Mix the primer.
CAUTION : SS-4004 PRIMER IS CLASSIFIED AS A DANGEROUS MATERIAL WHICH
_______ CAN CAUSE INJURY OR ILLNESS IF IT IS NOT CORRECTLY USED. REFER TO THE MANUFACTURER'S SPECIFIC SAFETY AND HEALTH RECOMMENDATIONS BEFORE YOU USE THIS PRODUCT. CAREFULLY READ THE APPLICABLE "MATERIAL SAFETY DATA SHEET" AND OBEY ALL SAFETY AND HEALTH PRECAUTIONS.
(a) Mix the primer (General Electric, use with RTV-88) (Material No. CP2215) per the manufacturer's instructions.
(12) Apply the primer to the two sides of the retainers (15), (70), washer (25), the head of the bolt (20), and the nut (50).
NOTE : The minimum time for the primer to cure is one hour at 70
____
deg.F (21.1 deg.C).
(13) Put the retainers (70) between the links and the engine brackets (35) and (55).
(14) Attach the engine mount links to the engine brackets (35) and (55) with the bolts (20), washers (25) and nuts (50).
(15) Tightening method.
CAUTION : USE TWO WRENCHES WHEN YOU TORQUE THE BOLT AND NUT. THE NUT
_______ CAN TURN. IF THE NUT TURNS IT CAN DAMAGE THE LINK.
(a) TORQUE the bolts (20) to 260 lbf.in (2.93 m.daN).
(16) Put the retainers (15) on the links against the retainers (70) and make sure the bolt holes are aligned.
(17) If the bolt holes are not aligned, increase the torque on the bolts
(20) to align the bolt holes.
NOTE : Do not TORQUE the bolt (20) more than to 320 lbf.in (3.61
____
m.daN).
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(65) and nuts (60).
NOTE : Make sure that you put countersunk washers under the bolt
____
head.
(19) TORQUE the nuts (60) to between 24 and 27 lbf.in (0.27 and 0.30 m.daN).
(20) Apply sealant as follows
(Ref. Fig. 402/TASK 71-21-11-991-301)
(detail B):
CAUTION : RTV-88 SEALANT IS CLASSIFIED AS A DANGEROUS MATERIAL WHICH
_______ CAN CAUSE INJURY OR ILLNESS IF IT IS NOT CORRECTLY USED. REFER TO THE MANUFACTURER'S SPECIFIC SAFETY AND HEALTH RECOMMENDATIONS BEFORE YOU USE THIS PRODUCT. CAREFULLY READ THE APPLICABLE "MATERIAL SAFETY DATA SHEET" AND OBEY ALL SAFETY AND HEALTH PRECAUTIONS.
(a) Fill the space between to the two retainers (15) and (70) with sealant silicone sealant (RTV-88) (Material No. CP2541).
(b) Fill the space between the wings on the nut (50) and the forward mount link with sealant (CP2541).
(c) Apply a bead of sealant (CP2541) around the head of the bolt (20).
END SB RA32171-4
5. Close-up
________
Subtask 71-21-11-410-057
A. Install the engine (Ref. TASK 71-00-00-400-042).
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R TASK 71-21-11-000-045
R Removal of the Forward Engine Mount Bolts One at a Time
R 1. Reason for the Job
__________________
R Self Explanatory
R 2. Job Set-up Information
______________________
R A. Fixtures, Tools, Test and Support Equipment
R -------------------------------------------------------------------------------R REFERENCE QTY DESIGNATION R -------------------------------------------------------------------------------
R No specific warning notice R No specific access platform 1.5 m (4 ft. 11 in.) R 98D27803500001 1 TOOL-ZERO LOCKING, FLAP SLAT CTL LEVER
R B. Referenced Information
R -------------------------------------------------------------------------------R REFERENCE DESIGNATION R -------------------------------------------------------------------------------
R 71-13-00-010-040 Opening of the Fan Cowl Doors
R 78-30-00-481-041 Make the Thrust Reverser Unserviceable for
R Maintenance
R 78-36-00-010-040 Opening of the Thrust Reverser Doors
R 71-21-11-991-909 Fig. 403
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