B737 CAPT DOES NOT FULLY COMPLY WITH ALL REQUIREMENTS OF MEL.

Narrative

CONTRACT MAINT WAS WORKING ON A BLEED AIR AND PRESSURIZATION MEL AT THE GATE WHEN WE WERE GIVEN THE AIRPLANE. THE FO AND I READ THROUGH THE MEL PAPERWORK GIVEN TO US WITH THE RELEASE AND WX. AFTER READING THE WRITE-UP AND DISCUSSING IT WITH THE FO; I FURTHER READ THE MEL/APPENDIX. AS A NEW CAPT; I STILL WANTED TO VERIFY AND CONFIRM ALL PROCS WITH DISPATCH AND MAINT. I FIRST WENT ONTO THE RAMP TO DISCUSS EVERYTHING WITH THE MECH AND VERIFY THE OUTFLOW VALVE POS VISUALLY. I THEN CALLED DISPATCH AND HAD MAINT PATCHED IN TO THE CONVERSATION. WE DISCUSSED THE 2 SEPARATE MEL'S IN DETAIL AND EVERYONE WAS COMFORTABLE WITH OUR COMPLIANCE. I WAS INFORMED TODAY BY COMPANY HEADQUARTERS THAT THE FAA IS LOOKING INTO THE FLT. THERE MAY HAVE BEEN AN ERROR IN THE APPLICATION OF THE MEL PROC. I FULLY BELIEVE ALL SWITCH POS; ALT RESTRS; RATES OF CLBS/DSCNTS AND OTHER SAFETY OF FLT ITEMS WERE FOLLOWED CORRECTLY. HEADQUARTERS SAID THE ERROR MAY HAVE BEEN IN THE PAX LOAD. THERE IS A NOTE ON A CHART IN THE APPENDIX THAT REFS PAX LOAD LIMITS OF 45 WHEN CHARTING VARIOUS CABIN AND CREW CABIN TEMPS. I MAY HAVE OVERLOOKED THIS REF BECAUSE IT IS NOT IN THE TEXT OUTLINE OF THE MEL APPENDIX. I THINK THE NOTE SHOULD BE INCORPORATED IN THE ACTUAL OUTLINE TEXT OF THE MEL AND THE OUTLINE TEXT OF THE APPENDIX; NOT JUST ON THE CHART. ALSO; I SHOULD HAVE SCRUTINIZED THE MEL APPENDIX CHARTS MORE.