I brewed this up yesterday afternoon. A slightly higher initial centennial addition. I also clocked in around 1.042 OG. My AA% were a bit lower than yours, so I had to up it slightly to get the IBU back up. Despite some minor spills, everything seemed to go well. Turns out the fermentation was slightly more vigorous that expected. I went to my parents house for the day, and returned to find the top had popped itself off. I'm not sure how long it has been off. Somewhere between 0 and 15 hours. Hopefully it didn't get contaminated. It doesn't seem to be bubbling in the airlock anymore, but perhaps it needs time to re-establish pressure or something.
Unfortunately, the all the lights are out in my house, so I can't see the extent of any over flow. It doesn't seem to be bad.
Unfortunately, the all the lights are out in my house, so I can't see the extent of any over flow. It doesn't seem to be bad.