Originally Posted by S80

Mapping should be:
AA | QR
First:
F | F
A | A

Business:
J | J
C | C
D | D
I | R
R | I
N/A | P (I believe this is Qatar's Loungeless Fares)
Prem Econ:
W | N/A (No Prem Econ Fare)
P | N/A (No Prem Econ Fare)

Econ:
Y | Y
H | B & H
K | K
M | M
L | L
V | V
G | G
S | N
N | S
Q | Q
O | O
B | ?
? | T & W