>>> jeopardize my GC process ? I have an approved EAD, shall I start looking for a new job and join if I get it ? Since I last entered US on AP, I can't use H1 any more, I'll have to use EAD.
If u are sure about loosing ur job, u should definitely start looking around. Have a start date of after Feb 5th so that u pass the 180 days test. U can work on a contractor basis till then, if required, and then join on a permanent basis on Feb 5th.
>>> Also what happens if I loose my job before 180 days and my current employer revokes my 140 ? Does it hamper the ongoing GC process ?
If the employer revokes 140 before 180 days are over, u would be in trouble - ur 485 would be denied. Why do u think ur employer would revoke ur 140? They don't have to do so by law.
>>> I have an approved 140 through my previous employer and I believe it hasn't been revoked. Can I use it in any way for aiding my current processing ?
---> Technically, u can file 485 based on that as well (without the job letter). However, as u are pretty close to completing 180 days requirement, I would suggest u hang on to ur current processing without complicating ur case with further 485s.
---> Try to convince ur employer of not revoking ur 140 till Feb 5th and then join another job using AC-21.
goodluck!
-ab