Hi,
The BEA report provided by mm43:
Link
The solutions that stem from this evaluation are
· Extended duration of emission of the ULB attached to the flight recorders (90 days
instead of 30 days),
· Installation of low frequency ULB (between 8.5 and 9.5 kHz) attached to the plane,
· Regular transmission of basic aircraft parameters (via ACARS for example),
· Triggered transmission of flight data. On this point, additional work is deemed
necessary and the BEA will again consult members of the group to conduct a study.
And,
· Installation of deployable recorders.
And the 2nd Solution at page 10: