There have been recent discussions about whether or not the cable tension should be checked at 600 hours after complying with a cable change, especially the wing cables on Learjet 45* aircraft and Learjet 60* aircraft.
Except for the C Inspection (1,200 HR), there are no requirements to check cable tensions. However, there are some who believe cable tensions should be checked at 600 hours after installation.
As the operator, if you would like to have the tensions checked at 600 hours after installation, or any other interval for that matter, do it, as long as the appropriate inspection requirements under FAR 91.409 f (1), (2), (3), or (4) are met and not exceeded beyond the allowable tolerances.
*Trademarks of Bombardier Inc. or its subsidiaries