TB 1-1520-238-20-109
NOTE
S Do not use alcohol or MEK to clean mount cavity drain.
S Do not pour solvents into mount cavity drain.
(a) If debris or plugged-up condition exists, clean cavity with compressed air
(paragraph 1.47).
NOTE
When checking for cracks, pay special attention to left forward
mount areas adjacent to where the two mounting bolts are
installed.
c. Check four elastomeric mounts for cracks. Use 10-power magnifier.
(1) If cracks are suspected, perform nondestructive inspection (TM
1-1520-264-23).
(2) If crack is found, replace mount.
(3) Submit a CAT I Deficiency Report to AMCOM, AMSAM-RD-AE-I-P-A.
d. Check four elastomeric mounts for distortion, corrosion, and dirt. Use 10-power
magnifier.
e. Check four elastomeric mounts for exposed bare metal on visible edge of rubber
sandwiched in mount.
(1) If bare metal is found, touch up bare metal (paragraph 1.49).
f. Install drain cavity debris shield on elastomeric mount.
(1) Install debris shield on elastomeric mount.
(a) Install two screws through retaining clip, debris shield, and mount.
(b) Apply petrolatum jelly to expose surface of shields. Use petrolatum
(item 138, App F).
g. Check outboard visible edge of rubber sandwiched in elastomeric mounts for
gaps and voids.
(1) Inspect rubber for gaps or voids of 0.2 INCH or greater. If gaps or voids
exceed limits, replace mount.
(2) Inspect rubber for gaps or voids totaling 0.5 INCH or greater. If gaps or
voids exceed limits, replace mount.
(3) Inspect rubber for gaps or voids more than 1/8 INCH deep below metal
edge. If gaps or voids exceed limits, replace mount.
h. Install fairings R545 and L545 (paragraph 2.2).
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