I doubt the difference was enough to make or break an airline unless they depended heavily on these.
On the case where the bug was reported, it made a difference of $14,000 a week with the plane. If you had 7 of them you're talking about $100K/week which, while nothing to sneeze at, isn't going to drive an airline into bankruptcy unless they were very small. If $100K/week is the difference between making and breaking you, you were going to go at some point soon anyhow, as fuel prices still have a long way to go.
Maybe let me say something. He's my friend and we are in the same alliance. He also told me his situation and give me some data about this.
In his case, he is
depended heavily on these. He's located at jet age 2 S. America (SAEZ), TJSJ is only a point for tech. stop, so if we use that set of data from the case where the bug was reported, the number used to find out how much the bug effected should be $14000*4=$56000 each plane, or $56000*7=$392000 for 7 planes every week. The number should be bigger as he also use those DC-8 for some shorter routes. From the data I get from him, that's more-or-less the same number he's losing now.
Here let see something real. He gives me the weekly estimated financial overview of one of his Douglas DC-8-42, at the fuel price USD 137. This plane is flying 1 long-hual (SAEZ-via SVMI-KJFK)and 5 "short"-hual distanation of distanced from about 8XX-27XX. All routes are not adjusted when the data is recored. Except for one, all of them have a L/F of more than 85%, most of them are 90% or more. Here's the belance:
Sold tickets 579 007 USD
Line maintenance (A+B) -31 123 USD
Insurance -765 USD
Fuel cost -315 471 USD
Route fees -79 554 USD
Weekly leasing cost -31 076 USD
Total 121 017 USD
We can see that, the fuel costed him most of his income. In the reporting case, the bug make the fuel cost 60-70% higher. If we use these sets of data, we can find he lost about 126000 USD every week because of the bug. 7 planes means 126000*7=882000 USD a week. This is not a small number, that's about 1/5 of his income.
It maybe a wrong thing for leasing those gas guzzlers, however that's should not cost his life: if he can keep those income lost to bug, he is still making profit now even the fuel price is high. And he know how to handle the problem, he ordered 2 fuel-saving L1011-500. He should be able to order more and stay in the game until they arrive. The fuel price may kill him finally, but not now. The bug, not the fuel price, brings him into this trouble now.
He just told me that after he adjusted the route, he has profit of about 4xx xxx even the fuel price reached new high. But he has no cash, making his planes in a very bad condition(no repair can be done), not able to extend leasing or carring out any marketing.