Summary
This document proposes to revise an earlier proposed airworthiness directive (AD) for certain Cirrus Design Corporation (CDC) Model SR20 and SR22 airplanes. The earlier NPRM would have required you to measure and adjust the crew seat break-over bolts and to replace the crew seat recline locks on both crew seats. The earlier NPRM resulted from CDC discovering that the crew seats, under emergency landing dynamic loads, may fold forward at less than the 26 G required by the regulations. Since issuing the earlier NPRM, FAA received and evaluated new service information that increases the serial number effectivity of the earlier NPRM. The new proposed AD includes the additional serial numbers in the applicability section. Since the change imposes an additional burden over that proposed in the earlier NPRM, we are reopening the comment period to allow the public additional time to comment on the proposed AD.