Active duty troops have until June 6 to voluntarily identify themselves to the department, and troops in the National Guard and Reserve have until July 7.
The cases set the legal tone for thousands more military families and civilians suing over a 2021 jet fuel leak into a Navy drinking water system on Oahu.
The CH-53 Super Stallion crashed Feb. 6, 2024, during a night flight when it hit a mountain near Pine Valley, California, killing all five Marines aboard.
Cheryl Mason's shift from administration insider to department watchdog elicited concerns about her ability to be an independent voice on VA operations.
The incident, in which the pilots were safely recovered, marks the third time since December that an F/A-18 assigned to the carrier Truman has been lost.