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Airbus[4] and OCCAR delivery records state the first production A400M for Germany (MSN018) was handed over to the Luftwaffe on 18 December 2014, one day before it landed at its Wunstorf home base.
Wikipedia's A400M article says assembly of the first aircraft "began at the Seville plant of EADS Spain in early 2007", lists Germany's 53 as the largest national order, and gives the TP400-D6 powerplant and the aircraft's role between the C-130 and C-17.
The Bundeswehr's own A400M page says "The Airbus[4] A400M replaces the Transall C-160" and that the first was delivered on 18 December 2014, with its technical data.
Airbus states it handed over the first A400M to the Bundeswehr[3] on 18 December 2014.
OCCAR delivery documentation and Airbus[4] retrospectives confirm the first production A400M for Germany was delivered to the Luftwaffe on 18 December 2014, assembled at the Seville final assembly line.
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