https://www.google.com/amp/s/amp.cnn.com/cnn/2022/04/20/politics/ukraine-aircraft-spare-parts/index.html#scso=_8LFgYvGZF9m7qtsPi7CYgA421:137.06666564941406
Ukraine's Air Force has added about 20 more operational aircraft after influx of spare parts, senior US defense official says...
The US has committed to sending Ukraine 16 Mi-17 helicopters, but the administration has declined to get involved in a transfer of MiG-29s from another country to Ukraine via the United States...
Ukraine's Air Force has been part of its aerial defense network, which also includes S-300 surface-to-air missiles and portable anti-aircraft missiles. The combination of platforms has prevented Russia from establishing air superiority over Ukraine and controlling the skies.
Despite the constant bombardment from Russian missiles and artillery, as well as the strikes on military bases, Ukraine's Air Force has remained largely intact, though it has suffered some losses.
In early March, about two weeks into the war, the defense official said Ukraine has 56 fighter aircraft, which composed about 80% of its fixed-wing fighters. But the Ukrainians weren't using their aircraft much, flying only five to 10 missions per day, the official said.
Even now, with more operational aircraft, the Ukrainian Air Force is still flying a very limited number of daily sorties, another defense official said.