2014 AD NPRM AD its recent final issuance are old news
The 2014 NPRM for the AD and its recent final issuance is old news, long ago addressed by service bulletins that operators had previously received. This appears to largely be an FAA administrative followup action. The one to five year compliance period further illustrates the low level risk status of the situation regarding the AD, recognizing that the theoretical condition is a very remote flight envelope corner case, combined with another necessary required failure, for this situation to even become an issue. Operators were already aware of all this via prior service bulletins, with any mods necessary likely completed or already planned.