ACR LTT CARGO LOADED IMPROPERLY RESULTING AN AFT CG EXCEEDING LIMITS.

Narrative

UPON ROTATION IN AN UNUSUALLY HIGH ATTITUDE (AFT C.G. SITUATION); I REALIZED THAT ACFT CARGO WAS IMPROPERLY LOADED. THE CARGO IMBALANCE WAS DUE BECAUSE OF UNEDUCATED GND PERSONNEL (WITH REGARD TO ACFT LIMITATIONS); RELATIVELY INEXPERIENCED F/O; HIS FAILURE TO BE AWARE OF ACFT LIMITATIONS; THE CAPT'S COMPLACENCY WITH REGARD TO HIS FAILURE TO DOUBLE CHK WT AND BALANCE DATA (LOAD MANIFEST). THE COMPLACENCY IS PARTIALLY DUE TO CURRENT CONTRACTUAL DISPUTES WITH THE CARRIER; AND EXTREME BOREDOM FLYING THE SAME ROUTES AND BEING OVERWORKED THIS WEEK (FIFTH DAY IN A ROW). THE MOST IMPORTANT FACTOR CONTRIBUTING TO THIS SITUATION IS THE OPERATION OF 2 DIFFERENT ACFT WITH A COMMON TYPE RATING; E.G.; THIS FLT CREW ALMOST ALWAYS OPERATES AN LTT MODEL B; WHICH HAS A HIGHER GROSS WT; HIGHER LIMITATIONS FOR CARGO BIN WTS; ETC. THIS OCCURRENCE OF IMPROPER C.G.; AND EXCEEDING THE WT LIMITS OF THE CARGO BINS HAPPENED IN AN LTT MODEL A; WHICH HAS LOWER ASSOCIATED WT LIMITS. I BELIEVE CARGO BIN WT LIMITS SHOULD BE PLACARDED IN THE COCKPIT.