Lead Technician reported a Maintenance Supervisor signed off aircraft discrepancies without actually doing the repair work.

Narrative

Aircraft X was in ZZZ for an RON (Remain Over Night). One of the cards assigned in the Bill of Work was Integrity Check Trimmable Horizontal Stabilizer Actuator (THSA) Ball Screw Shaft. During the inspection there were findings written up on Forms XXXXXX. Two of the items written up were 'Both THS actuator motors require replacement due to out of limit leaks'; and 'THSA lower claw stop rubber is deteriorated'. Both items were signed off by a supervisor; the leak as within limits; and the claw stop as 'cleaned rubber of discoloration; OK for service'. After these items were found to be signed off; they were written up again and repaired before the aircraft was returned to service.Signing off items by certain management individuals seems like it's becoming more commonplace; there is a lot of pressure that comes down from local upper management to the supervisors; to the point that it seems like it could be intimidation; the pressure then in turn comes down onto the crew chiefs and crew members. I have been in this station for a year now; and the pressure that I've seen come down on the crew members is dangerous; and can lead to larger problems. I feel that these items being signed off are in response to pressure from upper management due to extended out of service times.I feel that this has been going on for a long time; and will continue to happen unless there is outside influence to put an end to this.