Three codes were spotted in the page source of the PAC’s Weekly Wrap-up: March 20, 2016 post.

[1] Line 277: 54414222564431232726283732391055335820
[2] Line 280: 4yby2stnqm4y7g
[3] Line 280: w6fcm2cey6f4

Code #1

Observations

When separating the string into pairs, the passcode pattern becomes evident (higher numbers represent digits and lower numbers represent letters):

54 41 42 22 56 44 31 23 27 26 28 37 32 39 10 55 33 58 20

Code #2

Observations

The string appears to already match the passcode pattern.

Code #3

Observations

The appropriate amount of numbers for a passcode are present but it does not match the passcode pattern.