Boeing will also stop issuing majority of supplier purchase orders on 737, 767 and 777 programmes affected by strike.
Agencies warn an extended strike could impact operations and finances, increasing the risk of a downgrade.
A potential strike could start on Friday and would be a big blow to new CEO brought on after plane door panel blew off.
The carrier cancels 24 return flights until the end of Tuesday as it carries out fleet-wide inspections.