Hi neil_1821
I guess you are now thinking of getting the ACL reconstructed...
I tore mine 6 years ago skiing, got it cleaned out and had it reconstructed a month after (I was studying at that time - so no problems with being off work as I was able to walk all the time
). Time to heal varies - I was lucky, about a month after the surgery I was able again to do almost everything - easy running, small jumps, driving a car... my doc restriced me from doing saltos on the trampolin for 6 months though (3 months initially, but seeing how crazy I am he extended that period
).
The healing-period varies a lot with the type of surgery you use - and your own fitness. I guess average would maybe be 2-3 months for fairly fully recovery? Ask a surgeon if you know one - or give your AME a call to give you a better clue.
A good page to check out and get ideas of different healing-processes is:
http://factotem.org/cgi-bin/kneebbs.pl
All the best,
Eli