Trinity Map. Radar Factory 70%. Supplies flown from A65 to the Radar Factory, with multiple drops. About one third of the drops made at that damaged factory site, resulted in "Nothing was resupplied" message. Checked the building downtime and nothing appears not to have been affected.
The result was confirmed and duplicated by Snailman during this time. I was puzzled because I had not read that there was any time limit or supply limit for individuals resupplying, but

was wondering what had gone wrong? I even filmed and took a screenie of the supplies disappearing into the dust right next to a group of downed buildings.
Supply drops
The C-47, LVT(A)-2, SdKfz 251 and M-3 have the capability to drop supplies on a damaged field or strategic resource to shorten the downtime. These object supplies will repair all resupplyable objects in a one mile radius from the point where the supplies land.
My method included landing at the strat and rolling to 'apparent' concrete and ending flight. Although the concrete looks the same as that in Towns and at HQ, where I regularly land successfully,
I received "you have ditched" message. I then again flew from A65 runway to resupply. When I received 'nothing....' message on third supply, I began monitoring the placement of each box and also got confirmation from Snailman of him receiving the same message.