OS B76W seat maps are interesting. If you just pull up a random seatmap during the availability check it shows this:
Code:
SM OS 0091 C 01SEP VIEBOS 76W
A D G K
C 1 . C + + 1 C
2 / / / . 2
3 . + + . 3
4 . A A . 4
5 . A A . 5
6 . A A . 6
A D G K
. AVAILABLE <> WING F GEN FACI K GALLEY E EXIT C COT
+ OCCUPIED - LAST OFF H HANDICAP Q QUIET G GROUPS P PET
/ RESTRICTED B BULKHEAD V PREF.SEAT X BLOCKED L LEGROOM U UMNR
() SMOKING D DEPORTEE UP UP-DECK Z NO FILM I INFANT R REAR
Y CHARGEABLE
But if I add my SEN number and book the seat (not saved the PNR yet) it shows this:
Code:
SM OS 0091/J/01SEPVIEBOS/V /S002/
SM OS 0091 J 01SEP VIEBOS 76W
A D G K
C 1 . C + + 1 C
2 V V V . 2
3 . + + . 3
4 . A A . 4
5 . A A . 5
6 . A A . 6
A D G K
. AVAILABLE <> WING F GEN FACI K GALLEY E EXIT C COT
+ OCCUPIED - LAST OFF H HANDICAP Q QUIET G GROUPS P PET
/ RESTRICTED B BULKHEAD V PREF.SEAT X BLOCKED L LEGROOM U UMNR
() SMOKING D DEPORTEE UP UP-DECK Z NO FILM I INFANT R REAR
Y
And I could pick them. So if you are SEN, I would call OS and ask to be assigned 2DG. Why 2A and 2DG are marked 'preferential' is a mystery to me. 2A is one of the seats where you are right next to the aisle?
https://www.aerolopa.com/os-763