There are no wear limits or special requirements for periodic inspection of the thrust reverser vibration isolators. The aircraft manufacturer considers it structurally and functionally acceptable to continue operating with worn thrust reverser hinge fitting vibration isolators, provided that the thrust reverser cowls can be closed and latched.
A recent review has reconfirmed that continued operation with the existing thrust reverser hinge fitting isolator configurations in a deteriorated state will not have significant adverse consequences. See FTD 737-FTD-78-02001 for more information on this subject.
