Run dry - Not strictly so.
If I remember correctly from previous discussions on this topic…..in the event of an external [XMSN] oil leak, the oil system closes off external oil flow to the oil cooler thereby leaving the remaining un-cooled oil to lubricate the transmission.
As it’s FAR/JAR 29 certified, I guess the OEM was able to satisfy both AA’s that safe operation could be demonstrated for a minimum of 30-minutes.