Bombardier's C-Series aircraft was one of 96 UK planes delivered last month, revealed aerospace trade organisation ADS Group, as it forecasts a record year for the industry.
The value of last month's deliveries amounted to £2.2bn, it said, as it called for a customs deal to keep the sector "on track".
Commercial aircraft deliveries in the first four months of 2018 match figures from 2017's record production year and put the aerospace sector on track to deliver more than 1,700 aircraft this year, well ahead of last year's record total of 1,498, which was worth £29bn to the UK companies including Bombardier.
ADS chief executive Paul Everitt said: "April's aircraft deliveries were worth up to £2bn to UK industry, but creating new burdens for business under a "maximum facilitation" customs arrangement could cost our four sectors up to a combined £2.3bn a year. It is vital for the UK and EU to reach an agreement on a customs deal that preserves friction-free cross-border trade and imposes no new burdens that could threaten future growth."
Since January Bombardier has delivered six aircraft.