Originally Posted by georgetg

Ok slow, so now you are mixing in the concept of airframes, let me see if I understand:

Current DCI fleet 598
Current DCI block hour index = 1

Current mainline fleet 618
Current MBH to DBH ratio 1.19 to 1

Endgame DCI fleet 450
Endgame DCI block hour index = 1

Endgame mainline fleet?
Endgame mainline block-hour ratio to DCI block-hour ratio 1.56 to 1

Percentage reduction in DCI fleet 24.7%

If DCI flies a smaller fleet with no reduction in block hours, we haven't really "taken back flying to mainline." All we got is more large DCI jets producing the same number of block hours, generating more ASMs.

We will have modernized and upgauged the DCI fleet, increased DCI ASM production at a lower cost, with a smaller number of jets, but we will not have "reduced DCI flying."

If on the other hand the smaller DCI fleet results in the reduction of block hours at DCI, that will affect the DBH.

If DCI block hours are reduced by 24.7% after all 717 and 76-seaters are delivered, the ratio of 1.56 will result in a guarantee of 2% fewer mainline bloch hours than our current 1.19 ratio produces

Cheers
George