IFALPA published a Safety Bulletin regarding the turn back procedures in the NAT airspace.
The latest edition of NAT Document 007 – North Atlantic Operations and Airspace Manual (v.2017-1) contains a subtle modification to the NAT contingency procedures in Chapter 13 – Special Procedures for In-Flight Contingencies. An IFALPA Safety Bulletin highlights these modifications.
We encourage you to take note of this important Safety Bulletin in case you operate within the NAT airspace.