I just saw on trackaflight.com that PK721/PK 722 on 12/18/2003 is a 743. This flight is the one weekly flight from NY to KHI without a stop in Lahore or Islamabad, however it is always most definately operated by a 742 mixed passenger/freighter aircraft. I would think that with the one grounded 743 at LHR, PK wouldn't have the flexibility to put another 743 on the usual 74M route. Anybody know why the switch??