Have you ever noticed that in seat numbers we have A B C D E F G H J K ( The I is missing ) I have noticed that there is no I in most of the airlines i have travelled in
I don't know about 13 being Unlucky.As For me.I passed my BAMAC Papers in Aviation,results were declared on Friday the 13th & I collected it after walking under a Ladder & a Cat crossed my path.
13 is still my Lucky number.
BTW. One of the Bays at BOM Airport ie #13 holds the Aircraft I do Mx on.