VPod fitting
On QF aircraft, only Roller and Pratt powered aircraft are / were certified to carry a VPod. GE powered aircraft don't have the hard points fitted. Other airlines also have certification but not every one pays to certify on their fleets. BA is one that has certified them but don't know of others. In the '60, '70's and '80's this used to be very common on QF and BA aircraft (engines were not all that reliable in those eras). Now very rare to see.