Originally Posted by ATL7ER

YES you can. I have done that many times.

PWA 23.I

I. Personal Drop

1. A pilot may, via DBMS, submit one of the following requests to drop a rotation(s) or
reserve on-call day(s) that begins no earlier than the next day (see Section 23 E.):
a. PD, or
b. APD.
2. Next-day APD requests will be processed (before PD requests) each day, by category, in
seniority order among pilots who have submitted requests by 0700E on such day.
3. Next-day PD requests will be processed each day, by position, in seniority order among
pilots who have submitted requests by 0700E on such day.