do we not already have reports from ATC interviews that gear was UP on approach ?
suggests that they did know, if so why not advise the crew, did they really want their runway damaged ?
Several years ago I was reading an Indonesian incident report where the aircraft had caused a near miss by turning in the wrong direction during a SID. ATC were asked if they had seen this on radar and if so why didn't they warn the pilot when it was obvious the aircraft was not following the SID?
The reply by the ATC was the pilot of the 737 concerned was a former senior military officer well known to ATC and who had a propensity for ignoring SID requirements. In that society senior military people have contacts and unpleasant things can occur to anyone that has the temerity to question them or cross them. In the case of this particular pilot ATC said it was safer for all concerned to let him do what he likes and simply adjust the flight paths of other aircraft to avoid conflict