LONDON — Bombardier celebrated two major milestones on Wednesday as both its CSeries and Q400 aircraft passed 500 commitments.

The milestones were passed with a series of small order announcements, delivered by Bombardier’s President of Commercial aircraft Mike Arcamone.

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First up was an order for two Q400 Next-Gen turboprops from Thai low-cost carrier Nok Air. The two airplanes were converted from existing options the carrier purchased in November, 2013. Nok Air still has two remaining options, and six aircraft on order. The deal, worth $66 million US, pushes the commitments for the Q400 to 501. Bombardier sold one airplane, to Alaska Air Group, on Tuesday, taking the total to 499.

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Second was a set of two CSeries orders totaling up to 18 commitments. Thirteen CS300 jets were purchased for $553 million at list prices from an undisclosed existing carrier, split between seven firm and six options. The remaining five were signed for by an undisclosed African carrier, the CSeries first from the continent. Bombardier did not specify whether the letter of intent included solely -100s, -300s, or a mix of both. The deal is worth $365 million at list prices. The deal put the current commitment level for the jet at 513 frames.