Just talked to a member of JAS Ops earlier today.
The plane stepped into the mud on the intersection out of Apron D and Txy D (now known as NP1). Apparently the lighting conditions then was "disputed". However, the pilot said that judging by the ligts, he thought he'd make the turn OK (off record). I really don't know what happened.
No other 744s had any problems with the turn that day, nor did anyone mention any lighting problem.
The aircraft was stuck for about 1hr because the pilot's request for "a jack and a pneumatic pump" was initially blocked by the airport owners.
No other info.
PK-KAR