I was wondering when an American Airline pilot turns off the autopilot when landing.
Whenever you want (and the Captain permits).
There are specific limitations for specific airplanes making specific type approach/landing, but that varies with the aircraft type. i.e. 737 CATII/III HUD approaches require autopilot disconnect not later than 1000' AFL (HUD is a manually flown approach).
My question is that if the rule is not abided by, what are the consequences?
If an AA
operating limitation is intentionally or unintentionally not complied with, consequenses can be anything up to and including termination of employment --yes, it has happened in the not so recent past. What the FAA does is up to them. If the pilot properly "self-reports" an unintentional deviation (and subsequent investigation confirms no intent) via the AASAP program neither AA
nor FAA can "punish"--there will probably be additional "training" followed by extra "checking."