I probably sound like a Ukranian salesman, but here we go. The maintenance cost is derailed, after calculating a week of 12,000 more in maintinence of the A-158 and a yearly difference of 200,000 for the C check, you get 776,000 more than the Embraer each year in maintenance. So divide 11,000,000 by that number and you get about 14.1, which is how many years it would take before the Embraer caught up. And fuel burn per passenger is almost identical.

That's only taking account for Mx costs. considering that you're comparing E190 (92pax) to An158 (85pax), thats quite a difference.

Let's do the math: if we have a schedule that consists in 3 flights a day of 1.3hr each leg (6 legs) and enough time for A check...

--E190 will carry at %80 LF 74pax per leg. That's 444pax a day. Also the E190 has 343 flyable days (if we deduct B & C cks), so it would carry 125,292 pax per year at that LF. If we set tkt price at $185 we get an annual ticket income of $28,174,020.

Let's deduct the Mx costs to that number: Yearly A ck --> $270,360

B ck --> $161,772

C ck --> $311,091

Total = $743,223

So $28,174,020 - $743,223 = $27,430,797

Commonality cost is another factor aswell, and currently I'm spending nearly $600,000/year per E-195,

Then

$27,430,797 - $600,000 = $26,830,797 total in fixed Mx costs.

Fuel consumption: considering that we're talking about six legs of 1.3hr each, we have 7.8hrs of flight time per day. And F/F in the E190 is 1,840kg/hr.

So,

1,840kg/hr * 7.8hr = 14,352kg of fuel used per day. Fuel price is $650 now in MT3 therefore I will be spending $9,328 per day in Jet A-1, That makes $3,199,504 during those 343 flyable days.

We have then, $26,830,797 - $3,199,504 =

**$23,631,393** of total revenue PRE staff, insurance and other costs not directly related to the airframe.

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--An158 at %80 LF carries 68pax. That's 408pax per day (in this schedule). The An158 has also 343 flyable days, so it would carry 139,994 pax per year. Ticket price set at $185 and we have an income of $ 25,889,640 per annum.

Substracting Mx costs: Yearly A ck --> $451,974

B ck --> $270,432

C ck --> $520,050

Total = $1,242,456

$25,889,640 - $1,242,456 = $24,647,184 after Mx costs.

For commonality, as I don't know the costs related to an An158 fleet, I will use the same costs as the previous calc: $600,000.

So, $24,647,184 - $600,000 = $24,047,184 in total Mx costs.

Fuel consumption: we're talking about the same segment here so 7.8hrs flight time per day. An158's F/F is 1,810kg/hr.

Then, 1,810kg/hr * 7.8hr = 14118kg fuel used per day. Again, Jet A-1 price is $650 so I will spend $9,176 per day on kerosene or $3,147,368 per annum (a 343-day one).

Doing maths: $24,047,184 - $3,147,368 =

**$20,899,816** of total revenue PRE staff, insurance etc, etc.

We know that the E190 is currently priced $11,606,410 higher than the An158. And the difference in revenues between both aircrafts is: $26,631,393 - $20,899,816 = $2,731,576. This means that the E190 will earn $2,731,576 MORE than the An158 in an year.

So we divide $11,606,410 / $2,731,576 per year =

**4.25 YEARS**.

That's the amount of time it takes to the E190 to balance the price with the An158. Going beyond that will make the E190 earn MORE than the An158.

I didn't take in consideration the engine commonality as I don't know the cost of the An158 engine.

Disclaimer: I know that the E190 carries more ppl than the An158, but as there was a comparison between them....