Bearfoil, are the warm meat cargo specimens willing to pay for the cost of FDR and CVR over satellite? It is not going to come free. Usual connect time for voice quality satellite communications is in the $3 (highly compressed) to $15 (analog) per minute range the last I knew. That adds some $9000 for a 10 hour flight or about $40 an ambulatory chunk of cargo. I suppose that modest increase in cost might get absorbed - on every flight. Figure it'd be more like $50 increase by the time the cargo paid for it as the airlines tack on their usual profit margins.
(I presumed the $15 connection as it would have the fidelity to give clearly understandable voice. I know Inmarsat-M quality and would hardly begin to recommend it for a CVR substitute. And I did not consider the added digital connection, probably a tenth or less of the price I estimated.)
{^_^}