Temporary = not permanent, a bit of kit for a course to a 10 tonner. The 1033 is an document that accounts for the items absence from your store because it's been issued. When you hand the kit back you should receive the 1033 in exchange (or at least see the storeman rip it up) although I understand that nowadays you strike it through and sign to show it's been returned.
Kit on long term issue should be signed for every three months.
MATERIEL HELD ON PERSONAL LOAN
30. The following is to apply:
a. Individual Loans. The loan issue of equipment to an individual, including personal equipment, should be limited by the approving authority to a specific period not exceeding 3 calendar months; this period may be extended when the individual is away from the permanent station on detached duty. The item(s) is to remain on unit charge during the loan period, and the individual acknowledges receipt in a personal loan book or on AF G1033.
In essence, 1033s should normally be used to record a loan for up to 3 months but that may be extended, all 1033s should have an expiry date.
The 1033 itself is not a temporary issue, as an 'Issue / receipt' voucher it covers the transit from one account to the next. When a receipted copy is returned from the issuer they close it off their account.
Temporary loan is when you hold it against the 1033 only. If you are not returning it, resigning for it or bringing it onto an account then you haven't gained a freebie, it's just that someones not doing their job.
I was once issued a laptop, printer and various other kit at a seminar. As I had parked in the space behind the MGS hut they happily watched me walking back and forth piling shiney new gear on the back set of my car.
Then as soon as I pulled up to the gate everyone rushes out all excited to ask if I may have any government property in my posession!
When I pulled out a 1033 they looked like they might cry.
It's also amusing when you're presented with a fresh 1033 to resign for a bit of kit you've never heard of, and on inspecting the original it becomes blatantly obvious that the CQ and his goons have forged a shit load of signatures to cover their arses for missing kit on the recent Techeval.