not sure what fed ex manuals say but our company says the following about unsafe gear indications:
”It is unlikely that a low flypast of the control tower will add much to the information derived from the Cockpit indications. A low flypast should only be undertaken when there is good reason to believe that knowledge of the state of the landing gear, wheels, tyres etc. can be improved by such a manoeuvre.”
Not sure that some guy who’s not a pilot or an engineer with a pair of binoculars looking at the underside of my 130T jet in the dark moving at 150 knots is going to be able to add much useful information.
“They look like they’re down from here”. How that gonna change what you do?