No, it is not possible but the secofr or secadm can changed if you forget it.
It’s possible if you have TAA Productivity Tools from Jim Sloan, Inc. He’s a former IBMer with an incredible amount of commands you can add to your AS/400, like DSPPWD. Go to http://taatool.com/ for more info. We’ve used his tools for over 15 years and can’t function without them since we’ve got them in our programs as well. Basically, I consider him an extension of IBM… as he provides additional commands that you need to run your AS/400.
There are two general ways to view the password for a user.
First, hack the password store for a profile — this is not at all a trivial task and can generally be ignored as a possibility, especially when pass-phrases are allowed in place of passwords.
Second, a “password validation” program can be assigned through the QPWDVLDPGM system value (and potentially the registration facility). This program receives the password value and determines if it should be allowed. A common purpose is to have the program run tests such as dictionary tests. The program can accept or reject the password. A side-effect is that this program can also store the password for later retrieval.