what was the net change in airliner count during 2016?
table of contents item 2 . properties flight equipment and fleet renewal as of december 31 , 2016 , american operated a mainline fleet of 930 aircraft . in 2016 , we continued our extensive fleet renewal program , which has provided us with the youngest fleet of the major u.s . network carriers . during 2016 , american took delivery of 55 new mainline aircraft and retired 71 aircraft . we are supported by our wholly-owned and third-party regional carriers that fly under capacity purchase agreements operating as american eagle . as of december 31 , 2016 , american eagle operated 606 regional aircraft . during 2016 , we increased our regional fleet by 61 regional aircraft , we removed and placed in temporary storage one embraer erj 140 aircraft and retired 41 other regional aircraft . mainline as of december 31 , 2016 , american 2019s mainline fleet consisted of the following aircraft : average seating capacity average ( years ) owned leased total .

|  | Average Seating  Capacity | Average  Age  (Years) | Owned | Leased | Total |
| :--- | :--- | :--- | :--- | :--- | :--- |
| Airbus A319 | 128 | 12.8 | 19 | 106 | 125 |
| Airbus A320 | 150 | 15.5 | 10 | 41 | 51 |
| Airbus A321 | 178 | 4.9 | 153 | 46 | 199 |
| AirbusA330-200 | 258 | 5.0 | 15 | — | 15 |
| AirbusA330-300 | 291 | 16.4 | 4 | 5 | 9 |
| Boeing737-800 | 160 | 7.7 | 123 | 161 | 284 |
| Boeing757-200 | 179 | 17.9 | 39 | 12 | 51 |
| Boeing767-300ER | 211 | 19.5 | 28 | 3 | 31 |
| Boeing777-200ER | 263 | 16.0 | 44 | 3 | 47 |
| Boeing777-300ER | 310 | 2.8 | 18 | 2 | 20 |
| Boeing787-8 | 226 | 1.3 | 17 | — | 17 |
| Boeing787-9 | 285 | 0.2 | 4 | — | 4 |
| Embraer 190 | 99 | 9.2 | 20 | — | 20 |
| McDonnell DouglasMD-80 | 140 | 22.0 | 25 | 32 | 57 |
| Total |  | 10.3 | 519 | 411 | 930 |

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net_change = 55 - 71
answer = net_change